443 results on '"development"'
Search Results
2. A Developmental Study of Semantic Elaboration and Interpretation in Recognition Memory.
- Author
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Perlmutter, Marion
- Abstract
Two experiments examined semantic elaboration and interpretation in recognition memory of 4-year-olds and college students. Subjects were presented pictures of color-specific and non-color-specific items, and then tested for their recognition of the chroma of the items. (Author/MP)
- Published
- 1980
3. The Development of Communication: When a Bad Model Makes a Good Teacher.
- Author
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Sonnenschein, Susan and Whitehurst, Grover J.
- Abstract
Five experiments were conducted to find out what 6-year-old children learn about communication by switching listener and speaker roles with competent and incompetent adults and peers. (Author/MP)
- Published
- 1980
4. Object play and problem solving in infancy: Insights into tool use.
- Author
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Rat-Fischer, Lauriane, Plunkett, Kim, von Bayern, Auguste M.P., and Kacelnik, Alex
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PROBLEM solving , *MOTHER-infant relationship , *ADULTS - Abstract
• Complexity of play predicts infants' capacity to solve means-end problems. • This link does not depend on whether the problem involves the use of tools. • We compared tool and non-tool means-end problem-solving of similar difficulty. Tool use is primarily, but not exclusively, present in species with otherwise advanced cognitive traits. However, the interaction between such traits and conspecific inter-individual variation in the presence, complexity, or intensity of tool use is far from being established. We addressed this matter among human infants, seeking factors that relate to differences in tool use. We examined, both correlationally and experimentally, whether the propensity to engage in object combinations predicts performance in means–end problem-solving tasks involving or not involving the use of a tool. We tested 71 infants aged 15, 18, 21, and 24 months, dividing them into two subgroups: one exposed to an adult demonstrating object–object combinations (i.e., "prompting" infants to combine objects together) and another with comparable social exposure but where the adult demonstrated single-object manipulations. We found a correlation between the combined level of spontaneous and prompted object combinations and problem-solving performance regardless of the involvement of tools in the problem. However, we did not find differences in tool-use performance between the two demonstration subgroups. The correlational analysis suggests that complexity of play, as measured by the frequency of combining objects, is linked to infants' problem-solving skills rather than being specifically associated with tool use, as previously suggested in the literature. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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5. The development of self-initiated visuo-spatial working memory.
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Gorohovsky, Neta, Koor, Tamar, and Magen, Hagit
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SHORT-term memory , *TASK performance , *MEMORIZATION , *MEMORY , *EVERYDAY life - Abstract
• In everyday life children often construct their own memory representations. • We studied this aspect of memory in two visuo-spatial working memory tasks. • Children 7–10-years-old constructed spatially structured memory representations. • Children's memory performance was enhanced when memory was self-initiated. • Children possess metacognitive knowledge on the role of spatial structure in VSWM. Studies on the development of visuo-spatial working memory (VSWM) have focused almost exclusively on memory tasks in which children had no control over the content of the representations they memorized. In contrast, in everyday life children often select the items that they encode in memory. In the current study, we used two modified span tasks to explore the development of this aspect of memory, termed self-initiated (SI) VSWM, in children aged 7 to 10 years. In Experiment 1 participants memorized sequences of spatial locations, whereas in Experiment 2 participants memorized sequences of pictures of real-world objects and the spatial locations of the targets were irrelevant for task performance. In both experiments, participants either selected the targets they memorized themselves or memorized randomly selected targets that were provided to them. Previous studies in adults have shown that efficient processing in the SI condition in both tasks entails the construction of spatially structured representations. The results of the two experiments revealed that children constructed spatially structured representations with short paths between successive locations in the spatial sequences, fewer path crossings, and more linear shapes compared with the provided representations. Self-initiation benefited overall performance, especially in Experiment 1 where the memory task was more demanding. This study shows that 7- to 10-year-old children have access to the metacognitive knowledge on the spatial structure of VSWM and strategically impose structure during encoding to benefit memory performance. More generally, SI VSWM highlights an important aspect of behavior, demonstrating how children shape their environment to facilitate functioning. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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6. Mathematics anxiety and math achievement in primary school children: Testing different theoretical accounts.
- Author
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Möhring, Wenke, Moll, Léonie, and Szubielska, Magdalena
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MATH anxiety , *MENTAL rotation , *PERFORMANCE anxiety , *COGNITIVE development , *SCHOOL children , *CHILD development - Abstract
• High math-anxious children performed lower in an arithmetic task. • They used fewer mental strategies to solve arithmetic problems. • Mental rotation was only indirectly but not directly related to math anxiety. • Findings corroborate the disruption as well as the reduced competency account. Some students suffer from math anxiety and experience negative emotions in mathematics education. Children's math anxiety is negatively related to their math achievement, suggesting that math anxiety puts their math learning at risk. Several theoretical accounts have been proposed that help to explain this association between math anxiety and achievement. In the current study, we aimed to test predictions of two prominent theories, namely the disruption account and the reduced competency account, using a comprehensive and unifying approach. A sample of 6- to 8-year-olds (N = 163) answered a math anxiety questionnaire, solved a spatial task (mental rotation), and solved several arithmetic problems. After each arithmetic problem, they were asked how they solved the problem. Strategies were then classified into counting and higher-level mental strategies (including decomposition and retrieval), with higher-level strategies loading strongly on working memory resources. Analyses revealed a negative, albeit small, association between children's math anxiety and accuracy in solving arithmetic problems. In line with the disruption account, children's frequency of using higher-level mental strategies mediated this relation between math anxiety and arithmetic performance. Moreover, our results support the reduced competency account given that arithmetic performance was related to math anxiety, whereas mental rotation was only indirectly related to math anxiety. Overall, our findings corroborate both accounts, lending further support to the notion that these accounts might not be mutually exclusive. Our findings imply that interventions might be most effective when focusing on emotion regulation strategies and improving mathematical and spatial performance. [ABSTRACT FROM AUTHOR]
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- 2024
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7. Relieved or disappointed? Children's understanding of how others feel at the cessation of events.
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Johnston, Matthew, McCormack, Teresa, Lorimer, Sara, Corbett, Bethany, Beck, Sarah R., Hoerl, Christoph, and Feeney, Aidan
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EMOTIONAL state , *SOCIAL perception , *DISAPPOINTMENT , *EMOTIONS , *ADULTS , *SMOKING cessation - Abstract
• People's emotions are influenced not just by present events but also by how events have unfolded in the past and how they are likely to unfold in the future. • Importantly, emotions are shaped not only by thoughts about past or future events but also by the experience of events moving from the present and into the past. • Using single-character vignettes, we found that from age 4, children understand that the cessation of events can impact others' emotions and recognize that people feel differently following the cessation of positive, negative, and neutral events. • Results also indicate that the majority of 4-year-olds judge others as feeling happier at the end of negative events (an earlier understanding of relief than shown in previous research). However, 6-year-olds were less likely than adults to judge others as feeling sad at the end of positive events. People's emotional states are influenced not just by events occurring in the present but also by how events have unfolded in the past and how they are likely to unfold in the future. To what extent do young children understand the ways in which past events can affect current emotions even if they are no longer ongoing? In the current study, we explored children's ability to understand how others feel at the cessation of events—as events change from being present to being past. We asked 97 4- to 6-year-olds (40.2% female) and 35 adults (54.3% female) to judge how characters felt once particular types of events had ended relative to how they felt during these events. We found that from age 4, children judged (as adults do) that the character would feel positive at the cessation of negative events—what we refer to as temporal relief. This understanding of relief occurs earlier than has been shown in previous research. However, children were less likely than adults to judge others as feeling sad at the cessation of positive events—what we refer to as temporal disappointment. Overall, our findings suggest that children not only understand that the cessation of events can affect others' emotions but also recognize that people feel differently following the cessation of positive, negative, and neutral events. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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8. The impact of strategies on young children's saving for the future.
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Kamber, Ege, Maguire, Madi K., Tehrani, Edyta K., Mazachowsky, Tessa R., and Mahy, Caitlin E.V.
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ANALYSIS of covariance , *BUDGET , *CHILD development , *BOARD games , *PARENTS , *PRESCHOOL children , *PSYCHOLOGICAL distance - Abstract
• Children's saving improves with age during the preschool years. • Preschoolers make more optimal saving decisions with age. • Preschoolers' saving behavior was unaffected by saving strategies. • Parent-reported saving and children's saving behavior were positively correlated. The ability to save resources for future use, or saving, begins to emerge around 3 years of age, but children show low rates of saving during the preschool years. Thus, several strategies have been used to improve preschoolers' saving, such as providing a prompt, budgeting, increasing psychological distance, and simulating the future. The current study investigated (a) the development of saving in early childhood, (b) the impact of several saving strategies on children's saving (i.e., budgeting, tracking expenses, and psychological distance), and (c) whether the effectiveness of the strategies changed with age. Here, 3- to 5-year-old Canadian children (N = 254) completed the Saving Board Game, and their parents completed the saving subscale of the Children's Future Thinking Questionnaire. In the Saving Board Game, children were randomly assigned to one of the five strategies: (a) control, (b) budgeting, (c) tracking, (d) adult perspective, or (e) child perspective. An analysis of covariance with age, strategy, and response option order (as a covariate) showed a main effect of age, with 5-year-olds saving more than 3-year-olds. There was no effect of strategy or an interaction between strategy and age on children's token saving. Parent-reported child saving was positively correlated with children's Saving Board Game performance only in the control condition. We consider why these strategies failed to increase children's saving. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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9. The costs and benefits of kindness for kids.
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Curry, Oliver Scott, San Miguel, Chloe, and Tunç, Mehmet Necip
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YOUNG adults , *PROSOCIAL behavior , *CHILD development , *ADULTS , *KINDNESS - Abstract
• Children think kindness is about helping others; adults think kindness is also about paying a cost to help others. • Acts that help others in need were viewed as the kindest. • Children and teens say they are kinder than adults think they are. What do children think makes an act kind? Which kind acts are children likely to perform? Previous research with adults suggests that the kindness of acts depends largely on the benefit provided and to a lesser extent on the cost incurred, and that adults are more likely to perform low-cost, high-benefit kind acts. In the current study, children (9–12 years, n = 945) and teens (13–17 years, n = 939) rated the benefit, cost, kindness, and likelihood of performing 173 acts of kindness, and adults (18+ years, n = 891) rated how beneficial, costly, kind, and likely the acts would be for young people to perform. Among children and teens, benefit but not cost predicted the kindness of acts, and benefit positively predicted, but cost negatively predicted, performance (for "kindness quotients" of 61% and 65%, respectively). Among adults, benefit and cost predicted the kindness of acts, and cost, but not benefit, negatively predicted performance (for a kindness quotient of 59%). The results for children and teens are similar to those from previous research with adults; however, adults are more sensitive to cost when rating kindness, are less sensitive to benefit when rating performance by young people, and are less likely to think young people will perform acts of kindness overall. In practical terms, the results suggest that recommending cost-effective acts may be the best way to encourage children to be kinder. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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10. Attentional blink in infants under 7 months.
- Author
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Lee, Suetping, Tsurumi, Shuma, Kanazawa, So, and Yamaguchi, Masami K.
- Subjects
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ATTENTIONAL blink , *INFANTS , *AGE groups , *SHORT-term memory , *ADULTS - Abstract
• Attentional blink in infants under 7 months was examined. • Attentional blink was not observed in 5–6-month-old infants. • Infants under 180 days could not identify a single face target at 100 ms presentation speed but those over 180 days of age could. • Our study demonstrated that the capacity of the working memory would develop at half a year old. Attentional blink manifests in infants at 7 months of age, indicating that the working memory capacity of 7-month-olds is comparable to that of adults. However, attentional blink in infants under 7 months is not well understood. In this study, we conducted two experiments to investigate attentional blink in 5- and 6-month-old infants. The results of Experiment 1 demonstrated that attentional blinks were not observed with either a short lag (200 ms) or a long lag (800 ms). This suggests that 5- and 6-month-olds are unable to consolidate both targets regardless of the temporal distance between the two. We then split the infants into two groups by their age and conducted Experiment 2 with infants aged younger and older than 180 days to compare their consolidating ability to observe whether they could recognize a single item at 100-ms speed by presenting the same visual stream that was used in Experiment 1 except that one target was eliminated. The results showed that infants over 180 days of age could identify a single target in the visual stream at 100-ms presentation speed, whereas infants under 180 days could not. The findings of the current study indicate that the limitation of working memory capacity in infants under 7 months of age is a possible reason for the lack of attentional blink. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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11. Academic cheating in early childhood: Role of age, gender, personality, and self-efficacy.
- Author
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Yee, Shawn, Xu, Amy, Batool, Kanza, Duan, Tz-Yu, Cameron, Catherine Ann, and Lee, Kang
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STUDENT cheating , *FIVE-factor model of personality , *SELF-efficacy , *ETHNICITY , *PERSONALITY , *SOCIALIZATION , *GENDER - Abstract
• Factors influencing children's academic cheating are poorly understood. • Children were given unmonitored academic tests to measure actual cheating behaviors. • Older children cheated less than younger children. • Girls cheated less than boys. • Personality (Big Five) and self-efficacy did not predict children's cheating. • Personality and self-efficacy may need further development to be predictive of cheating. The current study investigated the association of children's age, gender, ethnicity, Big Five personality traits, and self-efficacy with their academic cheating behaviors. Academic cheating is a rampant problem that has been documented in adolescents and adults for nearly a century, but our understanding of the early development and factors influencing academic cheating is still weak. Using Zoom, the current study recruited children aged 4 to 12 years (N = 388), measured their cheating behaviors through six tasks simulating academic testing scenarios, and assessed their Big Five personality traits and self-efficacy through a modified Berkeley Puppet Interview paradigm, as well as age and gender. We found that children cheated significantly less with increased age and that boys cheated significantly more than girls. However, neither Big Five personality traits nor self-efficacy were significantly correlated with children's cheating. These findings suggest that academic cheating is a developing issue from early to middle childhood and that factors such as gender socialization may play a role in such development. Personal characteristics such as personality traits and self-efficacy may undergo additional development before their associations with cheating become robust, as reported in the adult literature. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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12. Child development and the role of visual experience in the use of spatial and non-spatial features in haptic object perception.
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Overvliet, Krista E., Postma, Albert, and Röder, Brigitte
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LOW vision , *RECOGNITION (Psychology) , *CHILD development , *SPACE perception , *ADULTS - Abstract
Previous work has suggested a different developmental timeline and role of visual experience for the use of spatial and non-spatial features in haptic object recognition. To investigate this conjecture, we used a haptic ambiguous odd-one-out task in which one object needed to be selected as being different from two other objects. The odd-one-out could be selected based on four characteristics: size, shape (spatial), texture, and weight (non-spatial). We tested sighted children from 4 to 12 years of age; congenitally blind, late blind, and adult participants with low vision; and normally sighted adults. Given the protracted developmental time course for spatial perception, we expected a shift from a preference for non-spatial features toward spatial features during typical development. Due to the dominant influence of vision for spatial perception, we expected congenitally blind adults to show a similar preference for non-spatial features as the youngest children. The results confirmed our first hypothesis; the 4-year-olds demonstrated a lower dominance for spatial features for object classification compared with older children and sighted adults. In contrast, our second hypothesis was not confirmed; congenitally blind adults' preferred categorization criteria were indistinguishable from those of sighted controls. These findings suggest an early development, but late maturation, of spatial processing in haptic object recognition independent of visual experience. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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13. Developmental changes in the visual, haptic, and bimodal perception of geometric angles.
- Author
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Holmes, Corinne A., Cooney, Sarah M., Dempsey, Paula, and Newell, Fiona N.
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ANGLES , *AGE groups , *GEOMETRIC shapes , *VISUAL learning , *SPATIAL ability , *FORM perception , *LOW vision - Abstract
• We measured spatial precision in vision and haptics for the perception of angles in children and adults. • A novel task was developed to capture children's ability to learn spatial angles through retracing using vision only, haptics only or bimodal inputs. • Accuracy in angle perception improved across childhood in all modalities. • Better performance for vision relative to haptics emerged during later development. • Performance in adults suggested that vision provided greater precision for angle perception, even across modalities. Geometrical knowledge is typically taught to children through a combination of vision and repetitive drawing (i.e. haptics), yet our understanding of how different spatial senses contribute to geometric perception during childhood is poor. Studies of line orientation suggest a dominant role of vision affecting the calibration of haptics during development; however, the associated multisensory interactions underpinning angle perception are unknown. Here we examined visual, haptic, and bimodal perception of angles across three age groups of children: 6 to 8 years, 8 to 10 years, and 10 to 12 years, with age categories also representing their class (grade) in primary school. All participants first learned an angular shape, presented dynamically, in one of three sensory tracing conditions: visual only, haptic only, or bimodal exploration. At test, which was visual only, participants selected a target angle from four possible alternatives with distractor angle sizes varying relative to the target angle size. We found a clear improvement in accuracy of angle perception with development for all learning modalities. Angle perception in the youngest group was equally poor (but above chance) for all modalities; however, for the two older child groups, visual learning was better than haptics. Haptic perception did not improve to the level of vision with age (even in a comparison adult group), and we found no specific benefit for bimodal learning over visual learning in any age group, including adults. Our results support a developmental increment in both spatial accuracy and precision in all modalities, which was greater in vision than in haptics, and are consistent with previous accounts of cross-sensory calibration in the perception of geometric forms. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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14. The structure of metacognition in middle childhood: Evidence for a unitary metacognition-for-memory factor.
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van Loon, Mariëtte, Orth, Ulrich, and Roebers, Claudia
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METACOGNITION , *CONFIRMATORY factor analysis , *AGE groups , *TASK performance , *FACTOR structure , *COMPUTER programming education - Abstract
• Eight- and ten-year-old's monitoring and control processes were investigated. • Kanji recognition, text comprehension, and secret code learning tasks were completed. • CFA showed that monitoring and control loaded on one latent factor. • Factor loadings were similar for the two age groups. • A metacognition-for-memory factor appears generalizable in middle childhood. It has been debated whether children's metacognitive monitoring and control processes rely on a general resource or whether metacognitive processes are task specific. Moreover, findings about the extent to which metacognitive processes are related to first-order task performance are mixed. The current study aimed to uncover the relationships among children's monitoring (discrimination between correct and incorrect responses), control (accurate withdrawal of wrong answers), and performance across three memory-based learning tasks: Kanji learning, text comprehension, and secret code learning. All tasks consisted of a study phase, a test phase, monitoring (confidence judgments), and control (maintaining/withdrawing responses). Participants were 325 children (151 second graders [ M age = 8.12 years] and 174 fourth graders [ M age = 10.20 years]). Confirmatory factor analyses showed that a model in which monitoring and control loaded on a joint factor and performance on a separate factor provided the best fit to the data. Fourth graders had better monitoring and control accuracy than second graders. However, the factor structure of metacognition was similar for both age groups, contradictory to the assumption that metacognition generalizes across tasks as children grow older. After accounting for task-specific processes, monitoring and control skills for language-based memory tasks appear to be generalizable in middle childhood. In sum, children's monitoring and control for three separate memory tasks appear to reflect a unitary metacognition-for-memory factor related to, but distinguishable from, performance. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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15. Prior visual experience increases children's use of effective haptic exploration strategies in audio-tactile sound–shape correspondences.
- Author
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Cao, Shibo, Kelly, Julia, Nyugen, Cuong, Chow, Hiu Mei, Leonardo, Brianna, Sabov, Aleksandra, and Ciaramitaro, Vivian M.
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SOUNDS , *SENSES , *HYPOTHESIS - Abstract
• Prior visual experience of 2-D abstract shapes presented on a screen enhanced how 6-8 year olds explored complementary 3-D objects via touch, haptic exploration, to extract shape features to match to sounds. • After visual experience of 2-D abstract shapes, 6-8 years-old children used more effective and efficient haptic exploration strategies to extract features of complementary shapes to match to sounds in early trials. • After prior visual experience of 2-D abstract shapes, 6-8 years-old children use fewer ineffective haptic exploration strategies to extract features of complementary shapes to match to sounds in later trials. Sound–shape correspondence refers to the preferential mapping of information across the senses, such as associating a nonsense word like bouba with rounded abstract shapes and kiki with spiky abstract shapes. Here we focused on audio-tactile (AT) sound–shape correspondences between nonsense words and abstract shapes that are felt but not seen. Despite previous research indicating a role for visual experience in establishing AT associations, it remains unclear how visual experience facilitates AT correspondences. Here we investigated one hypothesis: seeing the abstract shapes improve haptic exploration by (a) increasing effective haptic strategies and/or (b) decreasing ineffective haptic strategies. We analyzed five haptic strategies in video-recordings of 6- to 8-year-old children obtained in a previous study. We found the dominant strategy used to explore shapes differed based on visual experience. Effective strategies, which provide information about shape, were dominant in participants with prior visual experience, whereas ineffective strategies, which do not provide information about shape, were dominant in participants without prior visual experience. With prior visual experience, poking—an effective and efficient strategy—was dominant, whereas without prior visual experience, uncategorizable and ineffective strategies were dominant. These findings suggest that prior visual experience of abstract shapes in 6- to 8-year-olds can increase the effectiveness and efficiency of haptic exploration, potentially explaining why prior visual experience can increase the strength of AT sound–shape correspondences. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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16. Children's expectations about the stability of others' knowledge and preference states.
- Author
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Kurupınar, Mahmut, Serbest, Oya, Yılmaz, Duygu, and Soley, Gaye
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AGE groups , *EXPECTATION (Psychology) , *CHILDREN'S literature - Abstract
• We examined 4–-6 year-olds' stability attributions to others' knowledge and preference states. • With age, children expected knowledge to be more enduring. • Children attributed more stability across space compared to across time. • 6-year-olds attributed more stability when known/liked items were familiar. It is a crucial ability to predict others' psychological states across time and contexts. Focusing on cultural inventions such as songs and stories, we contrasted children's attributions of stability with others' knowledge and preference states across time and space and whether these attributions change as a function of children's familiarity with the known/liked items. Children (91 4-year-olds and 97 6-year-olds) were introduced to characters who knew or liked a song, a story, a game and a dance that were either novel or familiar. Children were asked whether the characters would still know/like these when they move to another city or when they grow up to be an adult. Both age groups expected these attributes to be more durable in the moving scenario compared with the growing-up scenario, but this trend became more robust with age. Whereas overall children did not judge knowledge as more durable than preferences, children found knowledge to be more enduring with age. The 6-year-olds' stability attributions also increased when known/liked items were familiar. These results suggest that, across the preschool years, children become more nuanced in their predictions about the future forms of knowledge and preference states. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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17. Phonetic matching of auditory and visual speech develops during childhood: evidence from sine-wave speech.
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Baart, Martijn, Bortfeld, Heather, and Vroomen, Jean
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Humans ,Lipreading ,Speech ,Child Development ,Cues ,Speech Perception ,Phonetics ,Child ,Child ,Preschool ,Audiovisual speech ,Cross-modal correspondence ,Development ,Phonetic cues ,Sine-wave speech ,Temporal cues ,Experimental Psychology ,Psychology ,Cognitive Sciences - Abstract
The correspondence between auditory speech and lip-read information can be detected based on a combination of temporal and phonetic cross-modal cues. Here, we determined the point in developmental time at which children start to effectively use phonetic information to match a speech sound with one of two articulating faces. We presented 4- to 11-year-olds (N=77) with three-syllabic sine-wave speech replicas of two pseudo-words that were perceived as non-speech and asked them to match the sounds with the corresponding lip-read video. At first, children had no phonetic knowledge about the sounds, and matching was thus based on the temporal cues that are fully retained in sine-wave speech. Next, we trained all children to perceive the phonetic identity of the sine-wave speech and repeated the audiovisual (AV) matching task. Only at around 6.5 years of age did the benefit of having phonetic knowledge about the stimuli become apparent, thereby indicating that AV matching based on phonetic cues presumably develops more slowly than AV matching based on temporal cues.
- Published
- 2015
18. Brain bases of morphological awareness and longitudinal word reading outcomes.
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Marks, Rebecca A., Eggleston, Rachel, and Kovelman, Ioulia
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SCHOOL children , *CHILDREN'S language , *NEURAL development , *FINANCIAL literacy - Abstract
• 75 children (ages 5–11) completed an auditory morphology task during fNIRS imaging. • Brain activations for morphological awareness predicted word reading 1.5 years later. • Stronger superior temporal activation was associated with greater reading gains. • Brain mechanisms for spoken language explain differences in reading over time. Children's spoken language skills are essential to the development of the "reading brain," or the neurocognitive systems that underlie successful literacy. Morphological awareness, or sensitivity to the smallest units of meaning, is a language skill that facilitates fluent recognition of meaning in print. Yet despite the growing evidence that morphology is integral to literacy success, associations among morphological awareness, literacy acquisition, and brain development remain largely unexplored. To address this gap, we conducted a longitudinal investigation with 75 elementary school children (5–11 years of age) who completed an auditory morphological awareness neuroimaging task at Time 1 as well as literacy assessments at both Time 1 and Time 2 (1.5 years later). Findings reveal longitudinal brain–behavior associations between morphological processing at Time 1 and reading outcomes at Time 2. First, activation in superior temporal brain regions involved in word segmentation was associated with both future reading skill and steeper reading gains over time. Second, a wider array of brain regions across the language network were associated with polymorphemic word reading as compared with broader word reading skill (reading both simple and complex words). Together, these findings reinforce the importance of word segmentation skills in learning to read and highlight the importance of considering complex word reading skills in building comprehensive neurocognitive models of literacy. This study fills a gap in our knowledge of how processing meaningful units in speech may help to explain differences in children's reading development over time and informs ongoing theoretical questions about the role of morphology in learning to read. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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19. Multisensory and biomechanical influences on postural control in children.
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Cheung, Theodore C.K. and Schmuckler, Mark A.
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INDIVIDUAL differences , *BODY size , *POSTURE , *MOTOR ability - Abstract
• Older children (6 to 11 years old) showed a multisensory integration advantage compared to their younger counterparts (3 to 6 years old). • The relation between anthropometric parameters (e.g., height, leg length, weight) and posture revealed a shifting pattern across development. For younger children, these parameters were positively related to postural stability. This relation likely arises due to body size being an indexed of general motor skill and experience. • For older children, body size parameters were non-significantly related to postural stability. This non-significant relation between body size and posture for older children can be seen as a developmental transition from childlike to adultlike balance control. Children's ability to maintain balance requires effective integration of multisensory and biomechanical information. The current project examined the interaction between such sensory inputs, manipulating visual input (presence vs. absence), haptic (somatosensory) input (presence vs. absence of contact with a stable or unstable finger support surface), and biomechanical (sensorimotor) input (varying stance widths). Analyses of mean velocity of the center of pressure and the percentage stability gain highlighted the role of varying multisensory inputs in postural control. Developmentally, older children (6–11 years) showed a multisensory integration advantage compared with their younger counterparts (3–5.9 years), with the impact of varying sensory inputs more closely akin to that seen in adults. Subsequent analyses of the impact of anthropometric individual difference parameters (e.g., height, leg length, weight, areas of base of support) revealed a shifting pattern across development. For younger children, these parameters were positively related to postural stability across experimental conditions (i.e., increasing body size was related to increasing postural control). This pattern transitioned for older children, who showed a nonsignificant relation between body size and balance. Interestingly, because adults show a negative relation between anthropometric factors and stability (i.e., increasing body size is related to decreasing postural control), this shift for the older children can be seen as a developmental transition from child-like to adult-like balance control. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
20. Development of numerical estimation in Chinese preschool children
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Xu, Xiaohui, Chen, Chuansheng, Pan, Maoming, and Li, Na
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Clinical Research ,Pediatric ,Child Development ,Child ,Preschool ,China ,Concept Formation ,Female ,Humans ,Male ,Mathematics ,Numerical estimation ,Number line ,Development ,Preschooler ,Kindergartener ,Psychology ,Cognitive Sciences ,Experimental Psychology - Abstract
Although much is known about the development of mental representations of numbers, it is not clear how early children begin to represent numbers on a linear scale. The current study aimed to examine the development of numerical estimation of Chinese preschoolers. In total, 160 children of three age groups (51 3- and 4-year-olds, 50 5-year-olds, and 59 6-year-olds) were administered the numerical estimation task on three types of number lines (Arabic numbers, dots, and objects). All three age groups took the test on the 0-10 number lines, and the oldest group also took it on the 0-100 and 0-1000 Arabic number lines. Results showed that (a) linear representation of numbers increased with age, (b) representation of numbers was consistent across the three types of tasks, (c) Chinese participants generally showed earlier onset of various landmarks of attaining linear representations (e.g., linearity of various number ranges, accuracy, intercepts) than did their Western counterparts, as reported in previous studies, and (d) the estimates of older Chinese preschoolers on the 0-100 and 0-1000 symbolic number lines fitted the two-linear and linear models better than alternative models such as the one-cycle, two-cycle, and logarithmic models. These results extend the small but accumulating literature on the earlier development of number cognition among Chinese preschoolers compared with their Western counterparts, suggesting the importance of cultural factors in the development of early number cognition.
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- 2013
21. Rapid identification of the face in infants.
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Tsurumi, Shuma, Kanazawa, So, Yamaguchi, Masami K., and Kawahara, Jun-Ichiro
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INFANT development , *FACE perception in infants , *INFANT psychology , *FACE , *INFANTS - Abstract
• Infants above 7 months identify the face during rapid visual stream at 100 ms/item. • Infants above 7 months fail to identify the inverted face during a visual stream. • 7- to 8-month-olds could process the face selectively among nontargets in 100 ms. • Infants below 7 months showed no ability to detect the rapidly presented face. • Rapid serial visual presentation is available in preverbal infants. Our visual system can rapidly process stimuli relevant to our current behavioral goal within various irrelevant stimuli in natural scenes. This ability to detect and identify target stimuli during nontarget stimuli has been mainly studied in adults, so that the development of this high-level visual function has been unknown among infants, although it has been shown that 15-month-olds' temporal thresholds of face visibility are close to those of adults. However, we demonstrate here that infants younger than 15 months can identify a target face among nontarget but meaningful scene images. In the current study, we investigated infants' ability to detect and identify a face in a rapid serial visual presentation. Experiment 1 examined whether 5- to 8-month-olds could discriminate the difference in the presentation duration of visual streams (100 vs. 11 ms). Results showed that 7- and 8-month-olds successfully discriminated between the presentation durations. In Experiment 2, we examined whether 5- to 8-month-olds could detect the face presented for 100 ms and found that 7- and 8-month-olds could detect the face embedded in rapid serial visual streams. To further clarify the face processing at this age of infants, we tested whether infants could identify upright and inverted faces in rapid visual streams in Experiments 3a and 3b. The results showed that 7- and 8-month-olds identified upright faces, but not inverted faces, during the visual stream, which reflected face inversion effects. Overall, we suggest that the temporal speed of face processing at 7 and 8 months of age would be comparable to that of adults. [ABSTRACT FROM AUTHOR]
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- 2019
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22. The role of affective touch in modulating emotion processing among preschool children.
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Della Longa, Letizia, Carnevali, Laura, and Farroni, Teresa
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PRESCHOOL children , *FACIAL expression & emotions (Psychology) , *EMOTION recognition , *AFFECT (Psychology) , *INTEROCEPTION , *EMOTIONS , *SELF-expression - Abstract
• The ability to recognize emotion expressions gradually develops in preschool age. • Affective touch activates interoceptive and socio-emotional brain circuits. • Affective touch modulates processing of emotion facial expressions in preschoolers. • Tactile experiences have potentially consequences on socio-emotional development. Recognizing emotional expressions is a prerequisite for understanding others' feelings and intentions, a key component of social interactions that develops throughout childhood. In multisensory social environments, touch may be crucial for emotion processing, linking external sensory information with internal affective states. The current study investigated whether affective touch facilitates recognition of emotional expressions throughout childhood. Preschool children (N = 121 3- to 6-year-olds) were presented with different tactile stimulations followed by an emotion-matching task. Results revealed that affective touch fosters the recognition of negative emotions and increases the speed of association of positive emotions, highlighting the centrality of tactile experiences for socioemotional understanding. The current research opens new perspectives on how to support emotional recognition with potential consequences for the development of social functioning. [ABSTRACT FROM AUTHOR]
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- 2023
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23. Effects of working memory updating on children's arithmetic performance and strategy use: A study in computational estimation.
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Hammerstein, Svenja, Poloczek, Sebastian, Lösche, Patrick, Lemaire, Patrick, and Büttner, Gerhard
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SHORT-term memory , *CHILDREN , *ARITHMETIC - Abstract
• Children with more efficient updating showed higher levels of strategy flexibility. • They selected the better strategy on each problem more often. • They tended to execute strategies faster, especially on larger problems. • Updating moderated problem-related differences in younger children. The current study investigated how children's working memory updating processes influence arithmetic performance and strategy use. Large samples of third and fourth graders were asked to find estimates of two-digit addition problems (e.g., 42 + 76). On each problem, children could choose between the rounding-down strategy (i.e., rounding both operands down to the closest decades) or the rounding-up strategy (i.e., rounding both operands up to the closest decades). Four tasks were used to assess updating. Analyses of strategy use revealed that children with more efficient updating showed higher levels of (a) strategy flexibility (i.e., they were less likely to use a single strategy on all or nearly all problems within a test block), (b) strategy adaptivity (i.e., they selected the better strategy overall more often and were more adaptive specifically on homogeneous and rounding-up problems), and (c) strategy performance (i.e., they tended to execute strategies more quickly, especially on homogeneous and larger problems). Finally, updating exerted a more important role for problem type effects in younger children than in older children. These findings have important implications for further understanding how working memory updating processes influence children's arithmetic performance and age-related differences therein. [ABSTRACT FROM AUTHOR]
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- 2019
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24. Developmental changes in the perception of audiotactile simultaneity.
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Stanley, Brendan M., Chen, Yi-Chuan, Lewis, Terri L., Maurer, Daphne, and Shore, David I.
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NEURAL transmission , *SENSORY perception , *SENSE organs , *BURST noise , *WHITE noise - Abstract
• Young children are more likely than adults to misjudge audiotactile simultaneity. • Precision reaches adult levels around 9–11 years of age. • Children, like adults, perceive simultaneity when touch precedes audition. • Audio- and visuo-tactile simultaneity perception develops later than audiovisual. We charted the developmental trajectory of the perception of audiotactile simultaneity by testing three groups of children (aged 7, 9, and 11 years) and one group of adults. A white noise burst and a tap to the index finger were presented at 1 of 13 stimulus onset asynchronies (SOAs), and the participants were asked to report whether the two stimuli were simultaneous. Compared with adults, 7-year-olds made significantly more simultaneous responses at 9 of the 13 SOAs, whereas 9-year-olds differed from adults at only 2 SOAs. The precision of simultaneity perception was lower, and response errors were higher, in younger children than in adults. The 11-year-olds were adult-like on all measures, thereby demonstrating that judgments about simultaneity for audiotactile stimuli are mature by 11 years. This developmental pattern is similar to that for simultaneity perception for visuotactile stimuli but later than that for audiovisual stimuli. The longer developmental trajectories of the perception of simultaneity between touch and vision and between touch and audition may arise from the need to coordinate and recalibrate between different reference frames and different neural transmission times in each sensory system during body growth; in addition, the ubiquity of audiovisual experience in everyday life may accelerate the development of that modality pairing. [ABSTRACT FROM AUTHOR]
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- 2019
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25. Contextual recruitment of cognitive control in preadolescent children and young adults.
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Surrey, Caroline, Kretschmer-Trendowicz, Anett, Altgassen, Mareike, and Fischer, Rico
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YOUNG adults , *ADAPTABILITY (Personality) , *GEOMETRIC congruences , *CHILDREN - Abstract
• Children aged 9–12 years were able to demonstrate contextual control recruitment. • Adjusting control resources in a trial-by-trial manner turned out to challenge children. • Young adults showed reliable adjustments of control for divers contextual requirements. The ability to use contextual cues to adjust cognitive control according to situational demands is a hallmark of flexible and adaptive behavior. We investigated the development of three different types of contextual control recruitment in children (9- and 12-year-olds) and young adults. First, we implemented a list-wide proportion congruence manipulation in which conflict trials were frequently/infrequently presented within a list of trials. Second, we implemented a location-specific proportion congruence manipulation in which conflict trials were frequently/infrequently presented at one of two locations. Both types of contextual control recruitment are based on the formation of high-level associations between context features (lists and locations) and the respective cognitive control set. Contextual recruitment of control is observed in reduced interference at contexts with high conflict frequencies. Finally, we investigated a trial-by-trial, conflict-triggered recruitment of cognitive control. Here, the experience of a conflict in the previous trial is expected to reduce subsequent conflict. In all three forms of control recruitment, distinct contextual cues reveal information about the required extent of cognitive control. Young adults showed reliable adjustments of control for all types of contextual cues. Children were able to demonstrate contextual control recruitment based on stable context–control associations (lists and locations). However, using single conflict signals turned out to challenge children in that they were able to adapt control resources only for error reduction, not for reaction times. Altogether, the results indicated that children can learn and use high-level associations between context and control sets. Implications regarding proactive and reactive mechanisms of cognitive control are discussed. [ABSTRACT FROM AUTHOR]
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- 2019
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26. Children's recognition of emotion expressed by own-race versus other-race faces.
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Segal, Shira C., Reyes, B. Nicole, Gobin, Keisha C., and Moulson, Margaret C.
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SADNESS , *EMOTION recognition , *CHILDREN - Abstract
Highlights • South Asian Canadians exhibit an own-race bias in emotion recognition. • White Canadians show similar recognition accuracy for White and South Asian faces. • Emotion recognition improves throughout childhood, and from childhood to adulthood. Abstract Adults are less accurate at recognizing emotions expressed by individuals from a different cultural background. However, the research with children is less clear; whereas some studies suggest better emotion recognition for own-race and own-culture faces, others have found no such relationship. The current study examined the influence of race on emotion recognition in children and adults who share a cultural background (i.e., Canadian). Based on previous studies, we hypothesized that participants would demonstrate better emotion recognition for own-race faces. We also hypothesized that emotion recognition would improve across the lifespan (from childhood to adulthood) and as a function of emotion, such that recognition would be better for happy faces than for the other emotions. Children (n = 69; ages 6–10 years; 41 female) and adults (n = 82; mean age = 19.94 years; 72 female) of Western European or South Asian descent were asked to complete a five-alternative forced-choice emotion recognition task (anger, fear, happiness, sadness, and neutral) in which expressions were displayed by White and South Asian faces. As predicted, adults performed better than older children, who performed better than younger children, and participants performed best on happy faces. South Asian participants, but not White participants, performed better when judging own-race faces compared with other-race faces. This finding only partially supports an own-race bias in emotion recognition and may reflect the tendency in the literature to conflate culture and race. More studies are needed to understand cross-race emotion recognition when individuals share the same culture. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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27. The computational basis of following advice in adolescents.
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Rodriguez Buritica, Julia M., Heekeren, Hauke R., and van den Bos, Wouter
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PEER pressure , *ADULT-child relationships , *TEENAGERS - Abstract
Highlights • Adolescents are more easily influenced than children and adults. • Adolescents rely more strongly on their own experience and explore more. • Computational models reveal intricate interaction between advice and experience. Abstract Advice taking helps one to quickly acquire knowledge and make decisions. This age-comparative study (in children [8- to 10-year-olds], adolescents [13- to 15-year-olds], and adults [18- to 22-year-olds]) investigated developmental differences in how advice, experience, and exploration influence learning. The results showed that adolescents were initially easily swayed to follow peer advice but also switched more rapidly to exploring alternatives like children. Whereas adults stayed with the advice over the task, adolescents put more weight on their own experience compared with adults. A social learning model showed that although social influence most strongly affects adolescents' initial expectations (i.e., their priors), adolescents showed higher exploration and discovered the other good option in the current task. Thus, our model resolved the apparently conflicting findings of adolescents being more and less sensitive to peer influence and provides novel insights into the dynamic interaction between social and individual learning. [ABSTRACT FROM AUTHOR]
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- 2019
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28. Emotion effects on memory from childhood through adulthood: Consistent enhancement and adult gender differences.
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Stenson, Anaïs F., Leventon, Jacqueline S., and Bauer, Patricia J.
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EMOTIONS , *GENDER differences (Psychology) , *CHILD development , *STIMULUS & response (Psychology) , *TASK performance - Abstract
Highlights • Emotion enhances recognition memory in children, adolescents, and adults. • For females, emotion consistently enhanced memory in participants aged 8–30 years. • For males aged 8–30, emotional memory enhancement diminished with age. • Gender differences in emotion effects on memory may emerge in adulthood. Abstract Emotion typically enhances memory. This "canonical" emotional memory enhancement (EME) effect has been extensively studied in adults, but its developmental trajectory is unclear. The handful of developmental studies that have manipulated emotion at encoding and then tested subsequent memory have yielded mixed results. To identify whether development change in EME occurs across middle childhood, adolescence, and early adulthood, we examined EME in 206 8- to 30-year-olds, using the same stimuli, paradigm, and analyses for all participants. At encoding, participants saw negative, neutral, and positive pictures while completing an incidental task. Two weeks later, participants completed a recognition memory test. We calculated negative–neutral and positive–neutral memory difference scores for each participant and then tested whether EME was predicted by age or gender. Negative pictures were remembered better than neutral pictures; the magnitude of this difference diminished in older male participants but not in older female ones. Positive pictures were also remembered better than neutral pictures, but this EME effect was small and did not change significantly with age or by gender. We also examined whether subjective ratings of stimulus emotion changed with age or between genders, and we report small differences. These results suggest that emotion effects on recognition memory are apparent by middle childhood and remain consistent across adolescence and early adulthood for girls and women, whereas emotion elicitation and EME effects diminish slightly with age for boys and men. These findings enrich both the EME literature specifically and what is known about emotion–cognition interactions across middle childhood, adolescence, and early adulthood more generally. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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29. Developmental evidence for a link between the inherence bias in explanation and psychological essentialism.
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Sutherland, Shelbie L. and Cimpian, Andrei
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DEVELOPMENTAL psychology , *PREJUDICES , *PSYCHOLOGICAL essentialism , *EXPLANATION , *SOCIAL psychology - Abstract
Highlights • The assumption that categories have deeper "essences" is pervasive. • What are the developmental origins of this essentialist assumption? • We propose that an inherence bias in children's explanations promotes essentialism. • Three experiments provided correlational and experimental evidence for this link. • Thus, essentialist beliefs may develop partly as a byproduct of explanatory biases. Abstract The assumption that natural and social categories have deeper "essences" is a fundamental feature of the conceptual system, with wide-ranging consequences for behavior. What are the developmental origins of this assumption? We propose that essentialism emerges in part from a bias in the process of generating explanations that leads reasoners to overuse inherent or intrinsic features. Consistent with this proposal, the inherence bias in 4-year-olds' explanations predicted the strength of their essentialist beliefs (Study 1; N = 64), and manipulations of the inherence bias in 4- to 7-year-olds (Studies 2 and 3; N = 112 each) led to subsequent changes in the essentialist beliefs of children who attended to the manipulation. These findings contribute to our understanding of the origins of essentialism. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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30. Here is a hint! How children integrate reliable recommendations in their memory decisions.
- Author
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Selmeczy, Diana and Ghetti, Simona
- Subjects
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CHILD psychology , *MEMORY , *DECISION making , *PROMPTS (Psychology) , *ADAPTABILITY (Personality) - Abstract
Highlights • Five to 9-year-old children adaptively bias recognition decisions to reliable memory cues. • Metamemory monitoring correlates with accuracy improvements following cues in 9-year-olds. • Invalid memory cues do not eliminate metamemory monitoring in children. Abstract Children's own memory is not the only reliable source of information about past events. Others may possess relevant knowledge, and children must learn to appropriately consider it in combination with their own memories. In the current study, we investigated 5-, 7-, and 9-year-olds' (N = 72) ability to incorporate probabilistically reliable (70% accurate) hints into their memory decisions. Results revealed that children across ages were appropriately sensitive to these cues without following them blindly and indiscriminately. Furthermore, individual differences in metamemory monitoring predicted overall accuracy improvements after receiving cues in 9-year-olds but not in 5- and 7-year-olds, revealing a developmental role of metamemory for discerning when cues are most informative or needed. Although 5-year-olds increased overall confidence in their memory after receiving invalid cues, they still preserved the capacity to monitor their memory in the face of inaccurate information. Overall, children were sensitive to reliable recommendations, but developing metacognitive mechanisms predicted judicious benefits from cues. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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31. Quantifying facial expression signal and intensity use during development.
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Rodger, Helen, Lao, Junpeng, and Caldara, Roberto
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FACIAL expression , *CHILD development , *EMOTION recognition in children , *PSYCHOPHYSICS , *SELF-expression - Abstract
Behavioral studies investigating facial expression recognition during development have applied various methods to establish by which age emotional expressions can be recognized. Most commonly, these methods employ static images of expressions at their highest intensity (apex) or morphed expressions of different intensities, but they have not previously been compared. Our aim was to (a) quantify the intensity and signal use for recognition of six emotional expressions from early childhood to adulthood and (b) compare both measures and assess their functional relationship to better understand the use of different measures across development. Using a psychophysical approach, we isolated the quantity of signal necessary to recognize an emotional expression at full intensity and the quantity of expression intensity (using neutral expression image morphs of varying intensities) necessary for each observer to recognize the six basic emotions while maintaining performance at 75%. Both measures revealed that fear and happiness were the most difficult and easiest expressions to recognize across age groups, respectively, a pattern already stable during early childhood. The quantity of signal and intensity needed to recognize sad, angry, disgust, and surprise expressions decreased with age. Using a Bayesian update procedure, we then reconstructed the response profiles for both measures. This analysis revealed that intensity and signal processing are similar only during adulthood and, therefore, cannot be straightforwardly compared during development. Altogether, our findings offer novel methodological and theoretical insights and tools for the investigation of the developing affective system. [ABSTRACT FROM AUTHOR]
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- 2018
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32. Age differences in intertemporal choice among children, adolescents, and adults.
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Ikink, Iris, van Duijvenvoorde, Anna C.K., Huizenga, Hilde, Roelofs, Karin, and Figner, Bernd
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AGE differences , *INTERTEMPORAL choice , *YOUNG adults , *TEENAGERS , *AGE groups , *REWARD (Psychology) - Abstract
• Children and adolescents made overall less patient intertemporal choices than young adults. • Each age group (incl. children) took into account delay and amount information. • Sensitivity to amount differences showed a further monotonic increase with age group. • Sensitivity to delays did not differ across children, adolescents, and young adults. • More patient choices with age thus seem driven by changes in amount sensitivity. When choosing between sooner–smaller and later–larger rewards (i.e., intertemporal choices), adults typically prefer later–larger rewards more often than children. Intertemporal choice preferences have been implicated in various impulsivity-related psychopathologies, making it important to understand the underlying mechanisms not only in terms of how reward magnitude and delay affect choice but also in terms of how these mechanisms develop across age. We administered an intertemporal choice paradigm to 60 children (8–11 years), 79 adolescents (14–16 years), and 60 young adults (18–23 years). The paradigm systematically varied amounts and delays of the available rewards, allowing us to identify mechanisms underlying age-related differences in patience. Compared with young adults, both children and adolescents made fewer later–larger choices. In terms of underlying mechanisms, variation in delays, absolute reward magnitudes, and relative amount differences affected choice in each age group, indicating that children showed sensitivity to the same choice-relevant factors as young adults. Sensitivity to both absolute reward magnitude and relative amount differences showed a further monotonic age-related increase, whereas no change in delay sensitivity occurred. Lastly, adolescents and young adults weakly displayed a present bias (i.e., overvaluing immediate vs. future rewards; nonsignificant and trend, respectively), whereas children showed a nonsignificant but opposite pattern, possibly indicating that specifically dealing with future rewards changed with age. These findings shed light on the underlying mechanisms that contribute to the development of patience. By decomposing overt choices, our results suggest that the age-related increase in patience may be driven specifically by stronger sensitivity to amount differences with age. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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33. The effect of response-to-stimulus interval on children's implicit sequence learning.
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Witt, Arnaud, Poulin-Charronnat, Bénédicte, Bard, Patrick, and Vinter, Annie
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IMPLICIT learning , *INCIDENTAL learning , *LEARNING , *TIME perspective - Abstract
• Children's sequence learning is influenced by response-to-stimulus interval. • Tolerance to a larger range of response-to-stimulus intervals appears with age. • Conscious awareness of the sequence emerges with age. • Conscious awareness of the sequence benefits from longer response-to-stimulus interval. The current study examined, for the first time in a developmental perspective, the effect of response-to-stimulus interval (RSI) in incidental sequence learning (SL). Children aged 4, 7, and 10 years performed a serial reaction time (SRT) task in which the RSI was systematically manipulated (0, 250, 500, or 750 ms). SL (difference in reaction times between fixed and random blocks) was not observed for the youngest children whatever the RSI condition, whereas the 7-year-olds learned the sequence only in the 250-ms RSI condition and the 10-year-olds exhibited SL in all temporal conditions except the 500-ms RSI condition. Finally, the results suggest that conscious awareness of the sequence emerges only in older children faced with the 500- and 750-ms RSI conditions. The discussion questions the robustness of implicit learning processes in the light of individual and contextual factors. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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34. Examining the role of attentional allocation in working memory precision with pupillometry in children and adults.
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Galeano-Keiner, Elena M., Pakzad, Sarvenaz, Brod, Garvin, and Bunge, Silvia A.
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SHORT-term memory , *PUPILLOMETRY , *YOUNG adults , *PUPILLARY reflex , *VISUOMOTOR coordination , *MNEMONICS - Abstract
• One key aspect of working memory development is increased mnemonic precision. • Pupillometry can index attentional allocation throughout a working memory trial. • Across trials, higher precision was linked to lower pupil dilation. • This intraindividual pupil-behavior relation was stronger for adults than children. • Improved precision in adulthood may reflect more efficient attentional allocation. Working memory (WM) precision, or the fidelity with which items can be remembered, is an important aspect of WM capacity that increases over childhood. Why individuals are more or less precise from moment to moment and why WM becomes more stable with age are not yet fully understood. Here, we examined the role of attentional allocation in visual WM precision in children aged 8 to 13 years and young adults aged 18 to 27 years, as measured by fluctuations in pupil dilation during stimulus encoding and maintenance. Using mixed models, we examined intraindividual links between change in pupil diameter and WM precision across trials and the role of developmental differences in these associations. Through probabilistic modeling of error distributions and the inclusion of a visuomotor control task, we isolated mnemonic precision from other cognitive processes. We found an age-related increase in mnemonic precision that was independent of guessing behavior, serial position effects, fatigue or loss of motivation across the experiment, and visuomotor processes. Trial-by-trial analyses showed that trials with smaller changes in pupil diameter during encoding and maintenance predicted more precise responses than trials with larger changes in pupil diameter within individuals. At encoding, this relationship was stronger for older participants. Furthermore, the pupil–performance coupling grew across the delay period—particularly or exclusively for adults. These results suggest a functional link between pupil fluctuations and WM precision that grows over development; visual details may be stored more faithfully when attention is allocated efficiently to a sequence of objects at encoding and throughout a delay period. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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35. Put your hands up! Gesturing improves preschoolers’ executive function.
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Rhoads, Candace L., Miller, Patricia H., and Jaeger, Gina O.
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GESTURE , *PSYCHOLOGY of preschool children , *EXECUTIVE function , *TASKS , *CONTROL groups - Abstract
This study addressed the causal direction of a previously reported relation between preschoolers’ gesturing and their executive functioning on the Dimensional Change Card Sort (DCCS) sorting–switch task. Gesturing the relevant dimension for sorting was induced in a Gesture group through instructions, imitation, and prompts. In contrast, the Control group was instructed to “think hard” when sorting. Preschoolers ( N = 50) performed two DCCS tasks: (a) sort by size and then spatial orientation of two objects and (b) sort by shape and then proximity of the two objects. An examination of performance over trials permitted a fine-grained depiction of patterns of younger and older children in the Gesture and Control conditions. After the relevant dimension was switched, the Gesture group had more accurate sorts than the Control group, particularly among younger children on the second task. Moreover, the amount of gesturing predicted the number of correct sorts among younger children on the second task. The overall association between gesturing and sorting was not reflected at the level of individual trials, perhaps indicating covert gestural representation on some trials or the triggering of a relevant verbal representation by the gesturing. The delayed benefit of gesturing, until the second task, in the younger children may indicate a utilization deficiency. Results are discussed in terms of theories of gesturing and thought. The findings open up a new avenue of research and theorizing about the possible role of gesturing in emerging executive function. [ABSTRACT FROM AUTHOR]
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- 2018
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36. Developmental changes in the perception of visuotactile simultaneity.
- Author
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Chen, Yi-Chuan, Lewis, Terri L., Shore, David I., Spence, Charles, and Maurer, Daphne
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CHILD development , *CHILD psychology , *SENSORY perception , *STIMULUS & response (Psychology) , *ADULTS - Abstract
A simultaneity judgment (SJ) task was used to measure the developmental trajectory of visuotactile simultaneity perception in children (aged 7, 9, 11, and 13 years) and adults. Participants were presented with a visual flash in the center of a computer monitor and a tap on their right index finger (located 20° below the flash) with 13 possible stimulus onset asynchronies (SOAs). Participants reported whether the flash and tap were presented at the same time. Compared with the adult group, children aged 7 and 9 years made more simultaneous responses when the tap led by more than 300 ms and when the flash led by more than 200 ms, whereas they made fewer simultaneous responses at the 0 ms SOA. Model fitting demonstrated that the window of visuotactile simultaneity became narrower with development and reached adult-like levels between 9 and 11 years of age. Response errors decreased continuously until 11 years of age. The point of subjective simultaneity (PSS) was located on the tactile-leading side in all participants tested, indicating that 7-year olds (the youngest age tested) are adult-like on this measure. In summary, the perception of visuotactile simultaneity is not fully mature until 11 years of age. The protracted development of visuotactile simultaneity perception may be related to the need for crossmodal recalibration as the body grows and to the developmental improvements in the ability to optimally integrate visual and tactile signals. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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37. Task switching costs in preschool children and adults.
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Peng, Anna, Kirkham, Natasha Z., and Mareschal, Denis
- Subjects
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PSYCHOLOGY of preschool children , *TASK performance , *STIMULUS & response (Psychology) , *NEUROPLASTICITY , *EXECUTIVE function - Abstract
Past research investigating cognitive flexibility has shown that preschool children make many perseverative errors in tasks that require switching between different sets of rules. However, this inflexibility might not necessarily hold with easier tasks. The current study investigated the developmental differences in cognitive flexibility using a task-switching procedure that compared reaction times and accuracy in 4- and 6-year-olds with those in adults. The experiment involved simple target detection tasks and was intentionally designed in a way that the stimulus and response conflicts were minimal together with a long preparation window. Global mixing costs (performance costs when multiple tasks are relevant in a context), and local switch costs (performance costs due to switching to an alternative task) are typically thought to engage endogenous control processes. If this is the case, we should observe developmental differences with both of these costs. Our results show, however, that when the accuracy was good, there were no age differences in cognitive flexibility (i.e., the ability to manage multiple tasks and to switch between tasks) between children and adults. Even though preschool children had slower reaction times and were less accurate, the mixing and switch costs associated with task switching were not reliably larger for preschool children. Preschool children did, however, show more commission errors and greater response repetition effects than adults, which may reflect differences in inhibitory control. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
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38. Equivalent auditory distraction in children and adults.
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Röer, Jan P., Bell, Raoul, Körner, Ulrike, and Buchner, Axel
- Subjects
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SHORT-term memory in children , *SELECTIVITY (Psychology) , *AUDITORY perception in children , *PSYCHOLOGY of adults , *CHILD development - Abstract
There is an ongoing debate about whether children have more problems ignoring auditory distractors than adults. This is an important empirical question with direct implications for theories making predictions about the development of selective attention. In two experiments, the disruptive effect of to-be-ignored speech on short-term memory performance of third graders, fourth graders, fifth graders, younger adults, and older adults was examined. Three auditory conditions were compared: (a) steady state sequences in which the same distractor was repeated, (b) changing state sequences in which different distractors were presented, and (c) auditory deviant sequences in which a deviant distractor was presented in a sequence of repeated distractors. According to the attentional resource view, children should exhibit larger disruption by changing and deviant sounds due to their poorer attentional control abilities compared with adults. The duplex-mechanism account proposes that the auditory deviant effect is under attentional control, whereas the changing state effect is not, and thus predicts that children should be more susceptible to auditory deviants than adults but equally disrupted by changing state sequences. According to the renewed view of age-related distraction, there should be no age differences in cross-modal auditory distraction because some of the irrelevant auditory information can be filtered out early in the processing stream. Children and adults were equally disrupted by changing and deviant speech sounds regardless of whether task difficulty was equated between age groups or not. These results are consistent with the renewed view of age-related distraction. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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39. Measuring on the go: Response to Morra, Panesi, Traverso, and Usai.
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Podjarny, Gal, Kamawar, Deepthi, and Andrews, Katherine
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BIOLOGICAL nomenclature , *COGNITIVE ability , *DECISION making , *PRESCHOOL children , *EXECUTIVE function - Abstract
Morra, Panesi, Traverso, and Usai’s ( Journal of Experimental Child Psychology , 2017, Vol. 167, pp. 246–258) effort to clarify theoretical models and nomenclature confusion surrounding young children's executive functions development is laudable and important. In this article, we address some of the points these authors raised regarding our previous article ( Journal of Experimental Child Psychology, 2017, Vol. 159, pp. 199–218). Although we agree that the Multidimensional Card Selection Task makes working memory demands, it goes beyond working memory to measure concurrent cognitive flexibility in preschoolers. Using this task will allow researchers to fine-tune our models of cognitive flexibility and executive functions development. [ABSTRACT FROM AUTHOR]
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- 2018
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40. Charting the development of cognitive mapping.
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Nazareth, Alina, Weisberg, Steven M., Margulis, Katherine, and Newcombe, Nora S.
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NAVIGATION , *SPATIAL ability in children , *ABILITY in children , *PSYCHOLOGY of learning , *CHILDREN'S psychic ability - Abstract
Developmental research beginning in the 1970s has suggested that children’s ability to form cognitive maps reaches adult levels during early adolescence. However, this research has used a variety of testing procedures, often in real-world environments, which have been difficult to share widely across labs and to use to probe components of mapping, individual differences in success, and possible mechanisms of development and reasons for individual variation. In this study, we charted the development of cognitive mapping using a virtual navigation paradigm, Silcton, that allows for testing samples of substantial size in a uniform way and in which adults show marked individual differences in the formation of accurate route representations and/or in route integration. The current study tested children aged between 8 and 16 years. In terms of components of normative development, children’s performance reached adult levels of proficiency at around age 12, but route representation progressed significantly more quickly than route integration. In terms of individual differences, by age 12 children could be grouped into the same three categories evident in adults: imprecise navigators (who form only imprecise ideas of routes), non-integrators (who represent routes more accurately but are imprecise in relating two routes), and integrators (who relate the two routes and, thus, form cognitive maps). Thus, individual differences likely originate during childhood. In terms of correlates, perspective-taking skills predicted navigation performance better than mental rotation skills, in accord with the view that perspective taking operates on extrinsic spatial representations, whereas mental rotation taps intrinsic spatial representations. [ABSTRACT FROM AUTHOR]
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- 2018
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41. Haptic two-dimensional shape identification in children, adolescents, and young adults.
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Overvliet, Krista E. and Krampe, Ralf Th.
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AGE groups , *PARTICIPANT observation , *DRAWING , *PRESCHOOL children , *SHORT-term memory - Abstract
We investigated the influence of image mediation (the process that translates tactile information into a visual image) on the development of haptic two-dimensional (2D) shape identification in 78 participants from five different age groups: preschoolers (4–5 years), first graders (6–7 years), fifth graders (10–11 years), young adolescents (12–13 years), and young adults (18–28 years). Participants attempted to haptically recognize everyday objects (three-dimensional [3D] haptic condition) and tangible line drawings (2D haptic condition) and to recognize objects presented through a serial visual “peek hole” version of the haptic line drawing task (2D visual condition). All groups were excellent at 3D haptic identification. However, preschoolers and first graders scored low in both visual and haptic line drawing tasks. From fifth grade onward, participants were reliably better at the visual peek hole task compared with the haptic line drawing task, which improved only gradually in young adolescent and adult age groups. We argue that both the spatial reference frame and working memory capacity constrain image mediation and children’s increasing abilities to correctly haptically identify 2D shapes. [ABSTRACT FROM AUTHOR]
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- 2018
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42. Young children are more willing to accept group decisions in which they have had a voice.
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Grocke, Patricia, Rossano, Federico, and Tomasello, Michael
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DECISION making in children , *CHILD development , *EQUALITY , *FAIRNESS , *PARTICIPATION - Abstract
People accept an unequal distribution of resources if they judge that the decision-making process was fair. In this study, 3- and 5-year-old children played an allocation game with two puppets. The puppets decided against a fair distribution in all conditions, but they allowed children to have various degrees of participation in the decision-making process. Children of both ages protested less when they were first asked to agree with the puppets’ decision compared with when there was no agreement. When ignored, the younger children protested less than the older children—perhaps because they did not expect to have a say in the process—whereas they protested more when they were given an opportunity to voice their opinion—perhaps because their stated opinion was ignored. These results suggest that during the preschool years, children begin to expect to be asked for their opinion in a decision, and they accept disadvantageous decisions if they feel that they have had a voice in the decision-making process. [ABSTRACT FROM AUTHOR]
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- 2018
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43. The interplay between sharing behavior and beliefs about others in children during dictator games.
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Santamaría-García, Hernando, González-Gadea, María Luz, Di Tella, Rafael, Ibáñez, Agustín, and Sigman, Mariano
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BELIEF & doubt , *DECISION making in children , *GAME theory , *SHARING , *CHILD psychology - Abstract
Previous studies in adults demonstrated that beliefs and sharing decisions in social scenarios are closely related. However, to date, little is known about the development of this relationship in children. By using a modified dictator game, we assessed sharing behavior and beliefs about others in children between 3 and 12 years old. We performed four studies ( N = 376) aimed to assess whether decisions were related to beliefs (Studies 1 and 2) and whether information about the recipient’s forced sharing behavior would shape decisions and beliefs (Studies 3 and 4). Results of Studies 1 and 2 showed that beliefs about others’ generosity were related to children’s sharing behavior. In Studies 3 and 4, we found that only children older than 9 years shared more pieces of candy when they knew that the recipient would be forced to share (cooperative context) than when they knew that the recipient would be forced not to share (noncooperative context). Besides, children older than 6 years did not modify their beliefs about others’ generosity according to these social contexts. These results suggest that normative or preconceived beliefs about the functioning of the social world may guide social behavior in children. [ABSTRACT FROM AUTHOR]
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- 2018
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44. Semantic content outweighs low-level saliency in determining children’s and adults’ fixation of movies.
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Rider, Andrew T., Coutrot, Antoine, Pellicano, Elizabeth, Dakin, Steven C., and Mareschal, Isabelle
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- *
EYE movements , *ATTENTION , *VIDEO excerpts , *AGE groups , *CHILD development - Abstract
To make sense of the visual world, we need to move our eyes to focus regions of interest on the high-resolution fovea. Eye movements, therefore, give us a way to infer mechanisms of visual processing and attention allocation. Here, we examined age-related differences in visual processing by recording eye movements from 37 children (aged 6–14 years) and 10 adults while viewing three 5-min dynamic video clips taken from child-friendly movies. The data were analyzed in two complementary ways: (a) gaze based and (b) content based. First, similarity of scanpaths within and across age groups was examined using three different measures of variance (dispersion, clusters, and distance from center). Second, content-based models of fixation were compared to determine which of these provided the best account of our dynamic data. We found that the variance in eye movements decreased as a function of age, suggesting common attentional orienting. Comparison of the different models revealed that a model that relies on faces generally performed better than the other models tested, even for the youngest age group (<10 years). However, the best predictor of a given participant’s eye movements was the average of all other participants’ eye movements both within the same age group and in different age groups. These findings have implications for understanding how children attend to visual information and highlight similarities in viewing strategies across development. [ABSTRACT FROM AUTHOR]
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- 2018
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45. Not just a sum of its parts: How tasks of the theory of mind scale relate to executive function across time.
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Doenyas, Ceymi, Yavuz, H. Melis, and Selcuk, Bilge
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EXECUTIVE function , *THOUGHT & thinking , *PRESCHOOL children , *BELIEF & doubt , *EMOTIONS - Abstract
There is a well-established relationship between theory of mind (ToM) and executive function (EF) during the preschool years. However, less is known about the concurrent and longitudinal relations between EF and specific tasks tapping different aspects of ToM. The current study investigated the ToM-EF relationship across 1 year in 3- to 5-year-old Turkish children using the ToM battery of Wellman and Liu (2004), which measures understanding of diverse desires (DD), diverse beliefs (DB), knowledge access (KA), contents false belief (CFB), explicit false belief (EFB), and hidden emotion (HE). This battery has not yet been used in its entirety to test the predictive relations between ToM and EF. We used peg-tapping and day–night tasks to measure EF. Our sample comprised 150 Turkish preschool children (69 girls) aged 36–60 months at Time 1 (T1) and 49–73 months at Time 2 (T2). Using the ToM composite with all six tasks, when child’s age, receptive language, and T1 ability level (EF or ToM) were controlled, T1 EF significantly predicted T2 ToM, whereas T1 ToM did not predict T2 EF. Among DD, DB, KA, false belief understanding (FBU: the composite score of CFB and EFB), and HE, only KA and FBU were significantly associated with EF at T1 and T2. Further regression analyses showed that KA did not have a predictive relationship with EF. Instead, FBU drove the predictive EF–ToM relationship across time. Thus, in Turkish children, earlier EF predicts later ToM, but especially the FBU component, in this well-validated battery. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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46. Vocabulary knowledge mediates the link between socioeconomic status and word learning in grade school.
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Maguire, Mandy J., Schneider, Julie M., Middleton, Anna E., Ralph, Yvonne, Lopez, Michael, Ackerman, Robert A., and Abel, Alyson D.
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VOCABULARY , *SOCIAL status , *ELEMENTARY schools , *PRESCHOOL children , *READING comprehension - Abstract
The relationship between children’s slow vocabulary growth and the family’s low socioeconomic status (SES) has been well documented. However, previous studies have often focused on infants or preschoolers and primarily used static measures of vocabulary at multiple time points. To date, there is no research investigating whether SES predicts a child’s word learning abilities in grade school and, if so, what mediates this relationship. In this study, 68 children aged 8–15 years performed a written word learning from context task that required using the surrounding text to identify the meaning of an unknown word. Results revealed that vocabulary knowledge significantly mediated the relationship between SES (as measured by maternal education) and word learning. This was true despite the fact that the words in the linguistic context surrounding the target word are typically acquired well before 8 years of age. When controlling for vocabulary, word learning from written context was not predicted by differences in reading comprehension, decoding, or working memory. These findings reveal that differences in vocabulary growth between grade school children from low and higher SES homes are likely related to differences in the process of word learning more than knowledge of surrounding words or reading skills. Specifically, children from lower SES homes are not as effective at using known vocabulary to build a robust semantic representation of incoming text to identify the meaning of an unknown word. [ABSTRACT FROM AUTHOR]
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- 2018
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47. Children’s agenda-based regulation: The effects of prior performance and reward on elementary school children’s study choices.
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Lipowski, Stacy, Ariel, Robert, Tauber, Sarah K., and Dunlosky, John
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SCHOOL children , *CHOICE (Psychology) in children , *OBJECTIVISM (Philosophy) , *LEARNING readiness , *CHILDHOOD attitudes , *ATTITUDE (Psychology) - Abstract
The main goal of the current experiments was to examine the influence of monitoring and reward on elementary school children’s study decisions. First and third graders studied names for 10 animals (e.g., “The elephant’s name is Suzy”) and then were given a cued recall test on which they were shown the animal and needed to recall the name. Next, they were given an opportunity to restudy the animal–name pairs, and some of these pairs were slated to earn a reward (a sticker) if correctly recalled. In Experiment 1, both groups of children were (a) more likely to restudy previously unrecalled pairs than previously recalled pairs and (b) more likely to restudy pairs that were slated to receive a reward. In Experiment 2, we further explored children’s use of reward using a forced-choice selection task. Namely, during selection, pairs were presented in dyads where one pair was slated for a reward and the other pair was not, and the children could choose only one pair from each dyad for restudy. Both first and third graders chose to restudy pairs slated for a reward. Thus, even young elementary school children consider both rewards and performance monitoring when regulating their learning. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
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48. Developmental changes in feature detection across time: Evidence from the attentional blink.
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Russo, Natalie, Kates, Wendy R., and Wyble, Brad
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- *
ATTENTIONAL blink , *COGNITIVE development , *LEARNING readiness , *COGNITIVE learning , *PERCEPTUAL motor learning - Abstract
The ability to select targets from an ongoing stream of visual information is critical to the successful management of visual attention. The attentional blink (AB), a phenomenon elicited using rapid serial visual presentation, allows for the assessment of the limits of the temporal visual system, and is reflected in a decrease in accuracy in the detection of the second of two targets when it occurs within 200–500 ms of a first target. Evidence regarding the development of the AB is mixed and appears to be dependent on the task demands. Here we present data examining the AB across middle childhood, early adolescence, and adulthood using a feature binding task. Participants were asked to detect and report the identity of two purple letters presented in a stream of black letters at a rate of 135 ms/item. On this feature binding task, the depth of the AB was invariant across development but AB recovery occurred earlier with increasing age. Furthermore, the error data suggested important developments in temporal binding that were reflected both in a decrease in the number of swaps (where participants reverse the order of the targets but identify them correctly) and in the spread of temporal binding errors with age. These findings suggest that the characteristics of the AB and its development are task dependent and also suggest that the development of binding abilities in visual search tasks mirrors the time course of multisensory binding effects, perhaps suggesting a common mechanism. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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49. The contribution of spatial ability to mathematics achievement in middle childhood.
- Author
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Gilligan, Katie A., Flouri, Eirini, and Farran, Emily K.
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SPATIAL ability , *MATHEMATICS , *ACADEMIC achievement , *STEM education , *PRIMARY schools - Abstract
Strong spatial skills are associated with success in science, technology, engineering, and mathematics (STEM) domains. Although there is convincing evidence that spatial skills are a reliable predictor of mathematical achievement in preschool children and in university students, there is a lack of research exploring associations between spatial and mathematics achievement during the primary school years. To address this question, this study explored associations between mathematics and spatial skills in children aged 5 and 7 years. The study sample included 12,099 children who participated in both Wave 3 (mean age = 5; 02 [years; months]) and Wave 4 (mean age = 7; 03) of the Millennium Cohort Study. Measures included a standardised assessment of mathematics and the Pattern Construction subscale of the British Ability Scales II to assess intrinsic–dynamic spatial skills. Spatial skills at 5 and 7 years of age explained a significant 8.8% of the variation in mathematics achievement at 7 years, above that explained by other predictors of mathematics, including gender, socioeconomic status, ethnicity, and language skills. This percentage increased to 22.6% without adjustment for language skills. This study expands previous findings by using a large-scale longitudinal sample of primary school children, a population that has been largely omitted from previous research exploring associations between spatial ability and mathematics achievement. The finding that early and concurrent spatial skills contribute to mathematics achievement at 7 years of age highlights the potential of spatial skills as a novel target in the design of mathematics interventions for children in this age range. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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50. Development of between-trial response strategy adjustments in a continuous action control task: A cross-sectional study.
- Author
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Verbruggen, Frederick and McLaren, Rossy
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COGNITIVE development , *CHILD psychology , *HUMAN research subjects , *STIMULUS satiation , *CONDITIONED response - Abstract
Response strategies are constantly adjusted in ever-changing environments. According to many researchers, this involves executive control. This study examined how children (aged 4–11 years) and young adults (aged 18–21 years) adjusted response strategies in a continuous action control task. Participants needed to move a stimulus to a target location, but on a minority of the trials (change trials) the target location changed. When this happened, participants needed to change their movement. We examined how performance was influenced by the properties of the previous trial. We found that no-change performance was impaired, but change performance was improved, when a change signal was presented on the previous trial. Extra analyses revealed that the between-trial effects on no-change trials were not influenced by the repetition of the previous stimulus. Combined, these findings provide support for the idea that response strategies were adjusted on a trial-by-trial basis. Importantly, we observed large age-related differences in overall change and no-change latencies but observed no differences in response strategy adjustments. This is consistent with findings obtained with other paradigms and suggests that adjustment mechanisms mature at a faster rate than other “executive” action control mechanisms. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
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