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This paper analyzes the functions of non-lexical backchannels in the Spoken Turkish Corpus and the differences in their use in naturally formed combinatory groups of gender and age (young-middle aged-elderly). Adopting a cyclic approach in the analysis of the 2231 non-lexical backchannels from the study corpus, two main and 16 sub-functions, eight of which are unique to this study and exhibit original dimensions have been identified. Results reveal that groups with female speakers and young speakers tend to use backchannels more for ‘approving the other speaker’, whereas groups with male speakers, middle-aged and elderly speakers tend to use backchannels more for ‘continuation of the conversation’. Despite these statistical tendencies, the findings suggest that when people have more in common and more interest in the given conversational topic, they use multifunctional non-lexical backchannels to construct meaning more cooperatively, regardless of gender and age-related variables.

Taxonomy lays the foundations for the study of biodiversity and its conservation. Procrustean geometric morphometrics (GMM) is a most common technique for the taxonomic assessment of phenotypic population differences. To measure biological variation and detect evolutionarily significant units, GMM is often used on its own, although it is much more powerful with an integrative approach, in combination with molecular, ecological and behavioural data, as well as with meristic morphological traits. GMM is particularly effective in taxonomic research, when applied to 2D images, which are fast and low cost to obtain. Yet, taxonomists who may want to explore the usefulness of GMM are rarely experts in multivariate statistical analyses of size and shape differences. In these twin papers, I aim to provide a detailed step-by-step guideline to taxonomic analysis employing Procrustean GMM in user-friendly software (with tips for R users). In the first part (A) of the study, I will focus on preliminary analyses (mainly, measurement error, outliers and statistical power), which are fundamental for accuracy, but often neglected. I will also use this first paper, and its appendix (Appendix A), to informally introduce, and discuss, general topics in GMM and statistics, that are relevant to taxonomic applications. In the second part (B) of the work, I will move on to the main taxonomic analyses. Thus, I will show how to compare size and shape among groups, but I will also explore allometry and briefly examine differences in variance, as a potential clue to population bottlenecks in peripheral isolates. A large sample of North American marmot mandibles provides the example data (available online, for readers to replicate the study and practice with analyses). However, as this sample is larger than in previous studies and mostly unpublished, it also offers a chance to further explore the patterns of interspecific morphological variation in a group, that has been prominent in mammalian sociobiology, and whose evolutionary divergence is complex and only partially understood.

There is a research gap in understanding people's perceived risks and their commute mode shifts after the major shift in anti-pandemic policies. Our study aims to reveal the relationship between commuters' perceived risks and their commuting mode transfers in the specific context of canceling anti-pandemic policies. We conducted an online sample survey of residents in 6 neighborhoods after one month the lifting of anti-pandemic policies in Kunming, China.Measured perceived risk data suggested that a perceived risk score of 23 ∼ 30 accounted for 62 % of the respondents, who were defined as the high-perceived risk group; while the perceived risk score of 14 ∼ 22 accounted for 36 % of the respondents, who were defined as the middle-perceived risk group; only 2 % of respondents with a perceived risk score of 6 ∼ 14. Commuting mode transfer statistics showed that 22.2 % of the respondents switched from other commuting modes to private cars, of which 56.1 % came from public transportation. Conversely, out of 81 car commuters, only 3 respondents moved to other commuting modes.We used nonparametric tests to find that there were group differences in commuting mode shifts. Specifically, the proportion of commuters with high-perceived risk levels shifted from other travel modes to private cars was 11% larger than that of commuters with middle-perceived risk levels. Public commuters were more likely to switch to car commuting than active commuters. The nonparametric test results also showed that single variables such as car ownership, commute distance, age, and marital status was significantly correlated with the distribution of the shifting in commuting mode. Furthermore, we employed a binary logistic regression model to reveal that commuters with higher perceived risk levels, longer commuting distances, or car ownership were more likely to switch from other travel modes to private cars than other commuters.The conclusion of this study is that the lifting of COVID-19 pandemic prevention and control policies increases the perceived risk level of commuters, which pushes them to switch to private car commuting. It is necessary to pre-estimating people's perceived risk level, and pre-judging changes in daily commute behaviors before deciding to cancel the anti-pandemic policies.

In second language and foreign language learning, demotivation in learning is a common occurrence. Almost all previous studies on learners' demotivation focused on traditional classroom learning environment rather than blended learning setting. This paper investigates learner perceptions of demotivating factors for Chinese EFL college students in blended learning context. 272 college sophomores with varied majors from a university in Mid-East China took part in a questionnaire survey. The questionnaire, consisted of 34 4-point Likert type items about learners' demotivation in a blended EFL learning environment, was adapted from Kikuchi's demotivation questionnaire and Xie's LPDS (Learner Perceptions of Demotivator Scale). An exploratory factor analysis was performed to explore the factor structure of the questionnaire items. Then mean scores of items loading on each factor were calculated and independent samples t-test analysis was adopted to examine the differences of demotivating factors between different groups of participants. Five demotivating factors from the questionnaire were extracted. The findings reveal a newly discovered factor: learners' lack of self-discipline in online learning. The paper indicates that there is no significant difference of these five demotivating factors between male and female learners, and between rural and urban learners. Whereas less motivated learners perceive four among the five factors to be more demotivating than more motivated learners. [ABSTRACT FROM AUTHOR]

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Lifelong learning has become imperative in today’s rapidly changing world, where people must constantly improve their knowledge and skills to contribute to life and work fully. Since the success of an organization in a knowledge-based economy is highly dependent on competent and committed employees, their professional development should be encouraged and supported at all levels. Managers need to participate in lifelong learning activities. Considering that the willingness to learn is an essential prerequisite for learner engagement and success, this study investigated managers’ motivation for lifelong learning. An online survey was conducted among Croatian managers to answer the research questions. They generally rated their motivation to participate in lifelong learning as very high. According to the results, the studied groups of managers were quite similar in their self-reported motivation levels, except for educational background. The study also found several important motivators for lifelong learning, such as increasing knowledge and skills, improving job performance, and satisfying the need to stay current. Some other potential motivators were not considered important, including gaining social recognition and job insecurity. An exploratory factor analysis revealed three underlying dimensions of motivation: job satisfaction and compensation, competence development, and recognition and respect. In addition, some significant group differences in the factors were found. Given the limited literature on this topic, this study contributes to a better understanding managers’ motivation for lifelong learning.

This paper explores whether a diversity and inclusion strategy focused on using modern intelligence tests can assist public safety organizations in hiring a talented diverse workforce. Doing so may offer strategies for mitigating the issues of systematic racism with which these occupations have historically struggled. Past meta-analytic research shows that traditional forms of intelligence tests, which are often used in this sector, have not consistently demonstrated predictive validity but have negatively impacted Black candidates. As an alternative, we examine a modern intelligence test that consists of novel unfamiliar cognitive problems that test takers must solve without relying on their prior experience. Across six studies of varying public safety jobs (e.g., police, firefighter) in different organizations, we found a pattern of results that supports the criterion-related validity of the modern intelligence test. In addition to consistently predicting job performance and training success, the modern intelligence test also substantially mitigated the observed Black–White group differences. The implications of these findings are discussed in terms of how to alter the legacy of I/O psychology and human resource fields when it comes to our impact on facilitating employment opportunities for Black citizens, particularly in public safety positions. [ABSTRACT FROM AUTHOR]

Research shows negative correlations between media exposure of body images in the context of hegemonic beauty ideals and body satisfaction. The present study deals with the underlying mechanisms and the effects of different exposure contents. In the online experimental study, a sample consisting of 226 individuals (82.3% female, 17.7% male) received a three-minute exposure to Instagram images of women and men in the context of either hegemonic beauty ideals in the experimental group or body diversity in the control group. A conducted Mixed ANOVA with repeated measures showed significant group differences, including an increase in body dissatisfaction in the experimental group and a reduction in the control group after exposure. Statistically significant detrimental effects of exposure to images in the experimental group on women’s state mood as well as descriptive similar tendencies on men’s state mood were found. Moderating effects of the tendency to make upward social comparisons and the internalization of the gender-specific beauty ideal on the relationship between exposure content and the change scores of body dissatisfaction were found. Furthermore, a mediation model was calculated to investigate the effect of exposure content on post-measurement of body dissatisfaction, using the constructs “comparison processes regarding sexual attractiveness” and “assessment of one’s own sexual attractiveness” as mediators. The model did not yield significant mediation, although significant relationships were found between the model components. Exploratory analyses were conducted on the influence of the assessment of one’s own sexual attractiveness on related social comparisons and the intensity of engagement with Instagram content as a predictor of body dissatisfaction. The results highlight the relevance for psychoeducational purposes of addressing a critical engagement with depicted beauty ideals in social media. Moreover, the study proposes body diversity as an alternative content that can have a positive impact on body satisfaction, which can be actively sought during the individual Instagram user experience. [ABSTRACT FROM AUTHOR]

IntroductionDuring COVID-19, the mental health of Chinese university students has been a pressing concern. But the internal mechanism of perceived campus outdoor environment and learning engagement affecting college students’ mental health during the COVID-19 pandemic has not been fully discussed.MethodsThe current study used cross-sectional data from 45 Chinese universities to explore the relationship among perceptions of campus outdoor environments, learning engagement, and college student mental health, and focused on differences among college students in different grades.ResultsOur study revealed the mental health problems of Chinese college students during the COVID-19 pandemic were more severe. The mental health of postgraduates was generally poor, and their risk of depression was higher than that of undergraduates. More importantly, for postgraduates, the direct impact of the perceived campus outdoor environment on their mental health was stronger. For undergraduates, the indirect impact of learning engagement on the effect of the perceived campus outdoor environment on their mental health was stronger.ConclusionThe results of the study have implications for campus planners, landscape architects, and university planners to pay particular attention to the needs of postgraduates for campus outdoor environments, which is of great significance to improve the overall mental health of students during the COVID-19 pandemic.

Contrary to the common notion that personality and intelligence are unrelated constructs, numerous correlational studies have demonstrated substantial associations between the two domains. Moreover, samples of intellectually gifted individuals have been found to differ from the general population in specific aspects of their personalities. However, most studies so far have relied on the Five-Factor Model of Personality (FFM), while none have investigated this phenomenon using the HEXACO personality framework. We recruited 617 adult members of the international high-IQ society MENSA and compared them to 3 reference samples (combined N = 112,637) regarding their personalities as measured by the HEXACO-60 personality inventory. We found that gifted persons scored higher in Honesty-Humility and Conscientiousness but lower in Emotionality compared to reference samples. Interestingly, gifted individuals scored only slightly higher in Openness to Experience, and no consistent differences emerged for Agreeableness. We demonstrate that some known personality differences between gifted and non-gifted persons translate from the FFM to the HEXACO model, while others do not. Our results indicate that within the HEXACO factor structure differences in sociability are more pronounced, while intellect-related differences are comparatively weak. [ABSTRACT FROM AUTHOR]

Establishing how collective behaviour emerges is central to our understanding of animal societies. Previous research has highlighted how universal interaction rules shape collective behaviour, and that individual differences can drive group functioning. Groups themselves may also differ considerably in their collective behaviour, but little is known about the consistency of such group variation, especially across different ecological contexts that may alter individuals' behavioural responses. Here, we test if randomly composed groups of sticklebacks differ consistently from one another in both their structure and movement dynamics across an open environment, an environment with food, and an environment with food and shelter. Based on high-resolution tracking data of the free-swimming shoals, we found large context-associated changes in the average behaviour of the groups. But despite these changes and limited social familiarity among group members, substantial and predictable behavioural differences between the groups persisted both within and across the different contexts (group-level repeatability): some groups moved consistently faster, more cohesively, showed stronger alignment and/or clearer leadership than other groups. These results suggest that among-group heterogeneity could be a widespread feature in animal societies. Future work that considers group-level variation in collective behaviour may help understand the selective pressures that shape how animal collectives form and function.

Air pollution has posed serious threats to human health. Based on the microdata of a large tertiary hospital in Shandong Province from 2016 to 2021, combined with the macro data such as air quality monitoring data, meteorological data, and city-level regional socio-economic data, this paper empirically tests the impact of air pollution instrumented by thermal inversions on the cardiovascular health of patients with type 2 diabetes mellitus (T2DM) and its group differences. The results show that: (1) Air pollution has a negative impact on the cardiovascular health of patients with T2DM, that is, the cardiovascular health of patients with T2DM will decline in regions with high air pollution; (2) The impact of air pollution on cardiovascular health in T2DM patients is heterogeneous, with males and older patients bearing greater air pollution health losses; (3) From the perspective of the external environment, the negative effects of environmental pollution on patients' health were significantly reduced in areas with higher environmental regulation intensity and better public health conditions, indicating the necessity of strengthening environmental governance and increasing public health expenditure.

This paper explores whether a diversity and inclusion strategy focused on using modern intelligence tests can assist public safety organizations in hiring a talented diverse workforce. Doing so may offer strategies for mitigating the issues of systematic racism with which these occupations have historically struggled. Past meta-analytic research shows that traditional forms of intelligence tests, which are often used in this sector, have not consistently demonstrated predictive validity but have negatively impacted Black candidates. As an alternative, we examine a modern intelligence test that consists of novel unfamiliar cognitive problems that test takers must solve without relying on their prior experience. Across six studies of varying public safety jobs (e.g., police, firefighter) in different organizations, we found a pattern of results that supports the criterion-related validity of the modern intelligence test. In addition to consistently predicting job performance and training success, the modern intelligence test also substantially mitigated the observed Black–White group differences. The implications of these findings are discussed in terms of how to alter the legacy of I/O psychology and human resource fields when it comes to our impact on facilitating employment opportunities for Black citizens, particularly in public safety positions.

Objective: This manuscript evaluates and tests the group differences in migrant workers' urban integration from the perspectives of individual characteristics and migration characteristics, so as to provide theoretical support and practical guidance for the government to issue more effective assistance policies. Methods: Multilevel comprehensive evaluation method and Entropy method are used to calculate the urban integration level of migrant workers, and one-way ANOVA and optimal scaling regression are used to test the group differences in migrant workers' urban integration. Results: Based on the questionnaire data of 854 migrant workers in China, the scale of migrant workers' urban integration has good reliability and validity. The overall level of migrant workers' urban integration is 49.61% and there exist group differences in migrant workers' urban integration. The impact of education level, income level, and migration time on migrant workers' urban integration is significantly positive, whereas the impact of migration distance on migrant workers' urban integration is significantly negative. The urban integration level of migrant workers who have family members accompanying them is higher than that of migrant workers who have no family members accompanying them. Gender, age, and marriage have no significant impact on migrant workers' urban integration. Strengths and Limitations of This Study: This study aims to measure and test the group differences in migrant workers' urban integration using ANOVA and optimal scaling regression. However, the shortcomings of this study are the selection of the "migrant workers' urban integration" scale and the representativeness of the sample used in this study. Conclusion: There are group differences in migrant workers' urban integration with different education levels, income levels, migration distances, migration times, and statuses of family members accompanying. In the policy of promoting migrant workers' urban integration, we should accurately count the characteristics of migrant workers and give more attention to migrant workers with low education levels, low-income levels, long migration distances, short migration times, and no family accompany. [ABSTRACT FROM AUTHOR]

Although the importance of lakes for providing cultural ecosystem services (CES) is widely recognized, the integration of associated values and benefits in decision making is still underdeveloped. Therefore, this study aimed at collecting and analyzing people's perceptions related to various CES of mountain lakes using an online questionnaire. We thereby distinguished societal values in terms of CES from individual experiences that contribute to subjective well-being and elicited perceived pressures reducing the quality of nature-based experiences. Based on 526 responses, our results indicate that bequest, symbolic, aesthetic, and spiritual values are perceived as most important, while representation and entertainment were less important. Accordingly, experiences such as connection to nature, relaxation, and freedom had the highest values. In terms of pressures, crowdedness was mentioned most often, followed by noisiness and garbage. These pressures mostly affected experiences such as connection to nature, freedom, relaxation, peace, and memories, with negative effects also on CES, mainly on aesthetic value, sense of place, existence value, and symbolic value. In general, the perceptions were highly consistent across different socio-cultural groups. Nevertheless, some differences emerged between groups with different cultural backgrounds with respect to CES and pressures, while differences in experiences were mostly related to gender. Our findings advance the understanding of CES related to mountain lakes and provide useful insights for research as well as decision and policy making, emphasizing the high intrinsic value expressed by the respondents as well as the variety of CES and experiences associated with mountain lakes. Moreover, the identified pressures provide a valuable basis for consideration in tourism management, the protection of natural resources, and sustainable development because they advance our understanding of how infrastructure development and socioeconomic changes may aggravate impacts on societal values and individual experiences. [ABSTRACT FROM AUTHOR]

ObjectiveThis manuscript evaluates and tests the group differences in migrant workers’ urban integration from the perspectives of individual characteristics and migration characteristics, so as to provide theoretical support and practical guidance for the government to issue more effective assistance policies.MethodsMultilevel comprehensive evaluation method and Entropy method are used to calculate the urban integration level of migrant workers, and one-way ANOVA and optimal scaling regression are used to test the group differences in migrant workers’ urban integration.ResultsBased on the questionnaire data of 854 migrant workers in China, the scale of migrant workers’ urban integration has good reliability and validity. The overall level of migrant workers’ urban integration is 49.61% and there exist group differences in migrant workers’ urban integration. The impact of education level, income level, and migration time on migrant workers’ urban integration is significantly positive, whereas the impact of migration distance on migrant workers’ urban integration is significantly negative. The urban integration level of migrant workers who have family members accompanying them is higher than that of migrant workers who have no family members accompanying them. Gender, age, and marriage have no significant impact on migrant workers’ urban integration.Strengths and Limitations of This StudyThis study aims to measure and test the group differences in migrant workers’ urban integration using ANOVA and optimal scaling regression. However, the shortcomings of this study are the selection of the “migrant workers’ urban integration” scale and the representativeness of the sample used in this study.ConclusionThere are group differences in migrant workers’ urban integration with different education levels, income levels, migration distances, migration times, and statuses of family members accompanying. In the policy of promoting migrant workers’ urban integration, we should accurately count the characteristics of migrant workers and give more attention to migrant workers with low education levels, low-income levels, long migration distances, short migration times, and no family accompany.

This study aimed to investigate the neuropsycholinguistic functioning of children with Developmental Dyslexia (DD) and Attention-Deficit/Hyperactivity Disorder - inattentive subtype (ADHD-I) in a reading task. The psycholinguistic profile of both groups was assessed using a battery of neuropsychological and linguistic tests and compared to typical readers. Participants were submitted to a silent reading task with lexical manipulation of the text. Eye movements were recorded and compared aiming to find cognitive processes involved in reading that could help differentiate groups. The study examined whether word-frequency and word-length effects distinguish between groups. Participants included 19 typical readers, 21 children diagnosed with ADHD-I and 19 children with DD. All participants were attending 4th grade and had a mean age of 9.08 years. Children with DD and ADHDI exhibited significant different cognitive and linguistic profiles on almost all measures evaluated when compared to typical readers. The effects of word length and word frequency interaction also differed significantly in the 3 experimental groups. The results support the multiple cognitive deficits theory. While the shared deficits support the evidence of a phonological disorder present in both conditions, the specific ones corroborate the hypothesis of an oculomotor dysfunction in DD and a visuo-spatial attention dysfunction in ADHD. [ABSTRACT FROM AUTHOR]

Contrary to the common notion that personality and intelligence are unrelated constructs, numerous correlational studies have demonstrated substantial associations between the two domains. Moreover, samples of intellectually gifted individuals have been found to differ from the general population in specific aspects of their personalities. However, most studies so far have relied on the Five-Factor Model of Personality (FFM), while none have investigated this phenomenon using the HEXACO personality framework. We recruited 617 adult members of the international high-IQ society MENSA and compared them to 3 reference samples (combined N = 112,637) regarding their personalities as measured by the HEXACO-60 personality inventory. We found that gifted persons scored higher in Honesty-Humility and Conscientiousness but lower in Emotionality compared to reference samples. Interestingly, gifted individuals scored only slightly higher in Openness to Experience, and no consistent differences emerged for Agreeableness. We demonstrate that some known personality differences between gifted and non-gifted persons translate from the FFM to the HEXACO model, while others do not. Our results indicate that within the HEXACO factor structure differences in sociability are more pronounced, while intellect-related differences are comparatively weak.

Why do students pick various courses? Interdisciplinary research has highlighted the role of structural constraints, normative expectations, and individual motivation as the joint influences of agency and structure in the service of life goals. Here, we examined undergraduates’ reasons for course choices for their most difficult and most important courses. We compared the reasons for non-major vs. major courses, for freshman vs. juniors, and across different disciplines. College students selected courses that fulfilled their major or breadth requirements, particularly in their freshman year. STEM courses were taken more for career development reasons than other disciplines, particularly humanities courses; social sciences courses were taken more for interest than STEM courses; and humanities courses were taken more for intellectual broadening than STEM courses.

Although the importance of lakes for providing cultural ecosystem services (CES) is widely recognized, the integration of associated values and benefits in decision making is still underdeveloped. Therefore, this study aimed at collecting and analyzing people's perceptions related to various CES of mountain lakes using an online questionnaire. We thereby distinguished societal values in terms of CES from individual experiences that contribute to subjective well-being and elicited perceived pressures reducing the quality of nature-based experiences. Based on 526 responses, our results indicate that bequest, symbolic, aesthetic, and spiritual values are perceived as most important, while representation and entertainment were less important. Accordingly, experiences such as connection to nature, relaxation, and freedom had the highest values. In terms of pressures, crowdedness was mentioned most often, followed by noisiness and garbage. These pressures mostly affected experiences such as connection to nature, freedom, relaxation, peace, and memories, with negative effects also on CES, mainly on aesthetic value, sense of place, existence value, and symbolic value. In general, the perceptions were highly consistent across different socio-cultural groups. Nevertheless, some differences emerged between groups with different cultural backgrounds with respect to CES and pressures, while differences in experiences were mostly related to gender. Our findings advance the understanding of CES related to mountain lakes and provide useful insights for research as well as decision and policy making, emphasizing the high intrinsic value expressed by the respondents as well as the variety of CES and experiences associated with mountain lakes. Moreover, the identified pressures provide a valuable basis for consideration in tourism management, the protection of natural resources, and sustainable development because they advance our understanding of how infrastructure development and socioeconomic changes may aggravate impacts on societal values and individual experiences.

Orientation: Practitioners and researchers often assume that the psychometric instruments they use are invariant and that they therefore measure similar constructs in a comparable manner across men and women respondents. This assumption is, however, rarely tested, leading to an undetected bias in research findings or an adverse impact because of the presence of non-invariance. Research purpose: After presenting essential information about measurement invariance (MI) and arguing for the testing thereof, this research aims to reveal the prevalence of MI across several frequently used psychometric instruments credulously used based on the assumption the revenant constructs are measured equivalently across gender exists. Motivation for the study: Firstly, this study aims to increase awareness regarding MI, a property that can be tested statistically. Secondly, the research aims to make practitioners aware of the presence of bias in psychometric instruments, specifically to identify instruments that could be included in investigations which attempt to understand gender matters in the workplace. Research approach/design and method: Cross-sectional survey data, pertaining to seven standard instruments, related to innovative work behaviour, were analysed. Pairwise, multigroup confirmatory factor analyses with robust maximum likelihood estimation were used to examine configural, metric, intercept and strict invariance, as well as the equivalence of the latent means. Main findings: The findings were binary, with four of the instruments showing MI at an equal latent means level, whilst three instruments were non-invariant at the configural level. Measurement invariance was either accepted completely or rejected completely. Practical/managerial implications: The serratedness of findings, even when using well-recognised and frequently used psychometric instruments, exposes the prevalence of non-invariance in some instruments, thereby necessitating the standard testing for MI. These findings also specify the instruments that are MI (in terms of gender), which allow other researchers and practitioners to use these instruments with more confidence when measuring and comparing men and women respondents in their studies. Contribution/value-add: This research demonstrates the ease with which MI testing can be performed and alerts researchers to do MI testing when conducting cross-group studies, as the prevalence of measurement non-invariance is high.

Orientation: Practitioners and researchers often assume that the psychometric instruments they use are invariant and that they therefore measure similar constructs in a comparable manner across men and women respondents. This assumption is, however, rarely tested, leading to an undetected bias in research findings or an adverse impact because of the presence of non-invariance. Research purpose: After presenting essential information about measurement invariance (MI) and arguing for the testing thereof, this research aims to reveal the prevalence of MI across several frequently used psychometric instruments credulously used based on the assumption the revenant constructs are measured equivalently across gender exists. Motivation for the study: Firstly, this study aims to increase awareness regarding MI, a property that can be tested statistically. Secondly, the research aims to make practitioners aware of the presence of bias in psychometric instruments, specifically to identify instruments that could be included in investigations which attempt to understand gender matters in the workplace. Research approach/design and method: Cross-sectional survey data, pertaining to seven standard instruments, related to innovative work behaviour, were analysed. Pairwise, multigroup confirmatory factor analyses with robust maximum likelihood estimation were used to examine configural, metric, intercept and strict invariance, as well as the equivalence of the latent means. Main findings: The findings were binary, with four of the instruments showing MI at an equal latent means level, whilst three instruments were non-invariant at the configural level. Measurement invariance was either accepted completely or rejected completely. Practical/managerial implications: The serratedness of findings, even when using well-recognised and frequently used psychometric instruments, exposes the prevalence of non-invariance in some instruments, thereby necessitating the standard testing for MI. These findings also specify the instruments that are MI (in terms of gender), which allow other researchers and practitioners to use these instruments with more confidence when measuring and comparing men and women respondents in their studies. Contribution/value-add: This research demonstrates the ease with which MI testing can be performed and alerts researchers to do MI testing when conducting cross-group studies, as the prevalence of measurement non-invariance is high. [ABSTRACT FROM AUTHOR]

Background: Ethnic differences in the timing of human tooth development are unclear. Aim: To describe similarities and differences in the timing of tooth formation in two groups of Sudanese children and young adults. Subjects and methods: The sample consisted of healthy individuals from Khartoum, Sudan, aged 2–23 years. The Northern group was of Arab origin (848 males, 802 females) and the Western group was of African origin (846 males, 402 females). Each mandibular left permanent tooth from first incisor to third molar was assessed from dental radiographs into one of 15 development stages. Mean ages at entry for 306 tooth stages were calculated using probit regression in males/females in each group and compared using a t-test. Results: Mean ages were not significantly different in most tooth stage comparisons between ethnic groups for both males (61/75) and females (56/76), despite a tendency of earlier mean ages in the Western group. Mean ages for most tooth stage comparisons between males and females (137/155) were not significantly different within ethnic groups suggesting low sexual dimorphism. Conclusion: The mean ages of most mandibular tooth formation stages were generally not significantly different between ethnic groups or between males and females in this study.

Static networks have been shown to foster cooperation for specific cost–benefit ratios and numbers of connections across a series of interactions. At the same time, psychopathic traits have been discovered to predict defective behaviours in game theory scenarios. This experiment combines these two aspects to investigate how group cooperation can emerge when changing group compositions based on psychopathic traits. We implemented a modified version of the Prisoner’s Dilemma game which has been demonstrated theoretically and empirically to sustain a constant level of cooperation over rounds. A sample of 190 undergraduate students played in small groups where the percentage of psychopathic traits in each group was manipulated. Groups entirely composed of low psychopathic individuals were compared with communities with 50% high and 50% low psychopathic players, to observe the behavioural differences at the group level. Results showed a significant divergence of the mean cooperation of the two conditions, regardless of the small range of participants’ psychopathy scores. Groups with a large density of high psychopathic subjects cooperated significantly less than groups entirely composed of low psychopathic players, confirming our hypothesis that psychopathic traits affect not only individuals’ decisions but also the group behaviour. This experiment highlights how differences in group composition with respect to psychopathic traits can have a significant impact on group dynamics, and it emphasizes the importance of individual characteristics when investigating group behaviours.

In second language and foreign language learning, demotivation in learning is a common occurrence. Almost all previous studies on learners' demotivation focused on traditional classroom learning environment rather than blended learning setting. This paper investigates learner perceptions of demotivating factors for Chinese EFL college students in blended learning context. 272 college sophomores with varied majors from a university in Mid-East China took part in a questionnaire survey. The questionnaire, consisted of 34 4-point Likert type items about learners' demotivation in a blended EFL learning environment, was adapted from Kikuchi's demotivation questionnaire and Xie's LPDS (Learner Perceptions of Demotivator Scale). An exploratory factor analysis was performed to explore the factor structure of the questionnaire items. Then mean scores of items loading on each factor were calculated and independent samples t-test analysis was adopted to examine the differences of demotivating factors between different groups of participants. Five demotivating factors from the questionnaire were extracted. The findings reveal a newly discovered factor: learners' lack of self-discipline in online learning. The paper indicates that there is no significant difference of these five demotivating factors between male and female learners, and between rural and urban learners. Whereas less motivated learners perceive four among the five factors to be more demotivating than more motivated learners., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Zhou, Zhan and Jawing.)