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Language skills play an important role in mathematics development. Students (7 to 10 years of age) learning school mathematics either in the same language used at home (first-language learners; n = 103) or in a different language (second-language learners; n = 57) participated in the study. Relations among cognitive skills (i.e., receptive vocabulary, working memory, quantitative skills), domain-specific language skills (i.e., mathematical vocabulary, mathematical orthography), word-problem solving, arithmetic fluency, and word reading were investigated. Second-language learners had lower scores on measures with strong language components (i.e., receptive vocabulary, subitizing, and word-problem solving) than first-language learners, whereas they performed equally well on other tasks. Mathematical vocabulary and receptive vocabulary contributed to word-problem solving success for first-language learners, whereas only receptive vocabulary in the language of instruction related to mathematical outcomes for second-language learners. Mathematical vocabulary was related to arithmetic fluency for both groups, but mathematical orthography was not. For both groups, students’ word reading was predicted by receptive vocabulary, but not by quantitative skills, highlighting the domain-specific nature of these skills. These findings have implications for supporting mathematical learning in second-language students.

International audience; Objective: Dysfunction of social cognition is well-recognized as one of amyotrophic lateral sclerosis (ALS) cognitive impairments. Previous studies have mostly associated social cognition subcomponents, including Theory of Mind (ToM), with executive dysfunction using highlydemanding tasks. In the present study, we investigate dysfunction of affective ToM in a sample of ALS patients without dementia and evaluate any possible associations both with executive and non-executive dysfunction. Methods: We included 42 ALS patients and 30 healthy controls (HC) and administered the Edinburgh Cognitive and Behavioural Amyotrophic Lateral Sclerosis Screen (ECAS). Affective ToM was examined based on the ECAS judgment of preference task; total score and type of errors ("favourite", "unclassified") were recorded for all participants. Results: A significant proportion of ALS patients (31%) were impaired on ToM task, scoring significantly lower compared to HC. Impairments in ToM task were more frequent (45%) in patients with cognitive impairment compared to those with intact cognition (15%). ALS patients showed significantly more errors on ToM task compared to HC. A significant association was found between ToM score and ECAS language and visuospatial abilities but not fluency, executive or memory function. Conclusion: Dysfunction of affective ToM appears prevalent in ALS patients without dementia, and associates with language and visuospatial abilities. These associations align with motor and extra-motor symptoms due to the degeneration across corresponding networks. Impaired ToM should be considered in clinical settings, since it might contribute to patients' social life, as well as the burden of their caregivers and relatives.

International audience; In recent years, many psycho-educational technologies were studied to address the school-related difficulties encountered by students with autism spectrum disorder (ASD). However, most of them remain individual-centered and do not consider the social environment. To fill this gap, this study reports on the user-centered design of a web-based support tool, which aims to support communication and coordination between parents, school staff, and health professionals of middle and high school students with ASD, in the context of elaborating, implementing, and following an Individualized Education Plan (IEP). The study followed a two-step design process: 1) a need analysis for identifying information domains deemed important by the stakeholders; 2) through a participative iterative design process, a panel of professionals and parents provided ideas and feedback on the design, which was integrated into subsequent prototype versions of the "ToGather" app.; Ces dernières années, de nombreuses technologies psycho-éducatives ont été étudiées pour répondre aux difficultés scolaires rencontrées par les élèves avec trouble du spectre autistique (TSA). Cependant, la plupart d'entre elles restent centrées sur l'individu et ne prennent pas en compte l'environnement social. Pour combler cette lacune, cette étude porte sur la conception centrée-utilisateur d'un outil en ligne, qui vise à soutenir la communication et la coordination entre les parents, le personnel scolaire et les professionnels médico-sociaux des élèves de collège et de lycée atteints de TSA, dans le contexte de l'élaboration, de la mise en œuvre et du suivi d'un projet personnalisé de scolarisation (PPS). L'étude a suivi un processus de conception en deux étapes : 1) une analyse des besoins pour identifier les domaines d'information jugés importants par les parties prenantes ; 2) par le biais d'un processus de conception participatif et itératif, un panel de professionnels et de parents a fourni des idées et des commentaires sur la conception, qui ont été intégrés dans les versions prototypes ultérieures de l'application "ToGather".

International audience; Everyday movements are guided by objects’ positions relative to other items in the scene (allocentric information) as well as by objects’ positions relative to oneself (egocentric information). Allocentric information can guide movements to the remembered positions of hidden objects, but is it also used when the object remains visible? To stimulate the use of allocentric information, the position of the participant’s finger controlled the velocity of a cursor that they used to intercept moving targets, so there was no one-to-one mapping between egocentric positions of the hand and cursor. We evaluated whether participants relied on allocentric information by shifting all task-relevant items simultaneously leaving their allocentric relationships unchanged. If participants rely on allocentric information they should not respond to this perturbation. However, they did. They responded in accordance with their responses to each item shifting independently, supporting the idea that fast guidance of ongoing movements primarily relies on egocentric information.

Previous studies have shown that self-generated stimuli in auditory, visual, and somatosensory domains are attenuated, producing decreased behavioral and neural responses compared with the same stimuli that are externally generated. Yet, whether such attenuation also occurs for higher-level cognitive functions beyond sensorimotor processing remains unknown. In this study, we assessed whether cognitive functions such as numerosity estimations are subject to attenuation in 56 healthy participants (32 women). We designed a task allowing the controlled comparison of numerosity estimations for self-generated (active condition) and externally generated (passive condition) words. Our behavioral results showed a larger underestimation of self-generated compared with externally generated words, suggesting that numerosity estimations for self-generated words are attenuated. Moreover, the linear relationship between the reported and actual number of words was stronger for self-generated words, although the ability to track errors about numerosity estimations was similar across conditions. Neuroimaging results revealed that numerosity underestimation involved increased functional connectivity between the right intraparietal sulcus and an extended network (bilateral supplementary motor area, left inferior parietal lobule, and left superior temporal gyrus) when estimating the number of self-generated versus externally generated words. We interpret our results in light of two models of attenuation and discuss their perceptual versus cognitive origins.SIGNIFICANCE STATEMENTWe perceive sensory events as less intense when they are self-generated compared with when they are externally generated. This phenomenon, called attenuation, enables us to distinguish sensory events from self and external origins. Here, we designed a novel fMRI paradigm to assess whether cognitive processes such as numerosity estimations are also subject to attenuation. When asking participants to estimate the number of words they had generated or passively heard, we found bigger underestimation in the former case, providing behavioral evidence of attenuation. Attenuation was associated with increased functional connectivity of the intraparietal sulcus, a region involved in numerosity processing. Together, our results indicate that the attenuation of self-generated stimuli is not limited to sensory consequences but is also impact cognitive processes such as numerosity estimations.

Though we know little more about deja vu today than we did back in the days of Arnaud over a century ago, we have learned a great deal about other forms of misattribution. This is hard-won knowledg...

Data availability all datasets used in this study are available on the web at the following addresses (see also the manuscript):- https://www.usgs.gov/volcanoes/kilauea/monitoring- https://www.usgs.gov/observatories/hawaiian-volcano-observatory- https://pnsn.org/seismograms- https://www.pnsn.org/tremor- http://www.fdsn.org/networks/detail/Y4_2014.; International audience; Data visualization, and to a lesser extent data sonification, are classic tools to the scientific community. However, these two approaches are very rarely combined, although they are highly complementary: our visual system is good at recognizing spatial patterns, whereas our auditory system is better tuned for temporal patterns. In this article, data representation methods are proposed that combine visualization, sonification, and spatial audio techniques, in order to optimize the user’s perception of spatial and temporal patterns in a single display, to increase the feeling of immersion, and to take advantage of multimodal integration mechanisms. Three seismic data sets are used to illustrate the methods, covering different physical phenomena, time scales, spatial distributions, and spatio-temporal dynamics. The methods are adapted to the specificities of each data set, and to the amount of information that the designer wants to display. This leads to further developments, namely the use of audification with two time scales, the switch from pure audification to time-modulated noise, and the switch from pure audification to sonic icons. First user feedback from live demonstrations indicates that the methods presented in this article seem to enhance the perception of spatio-temporal patterns, which is a key parameter to the understanding of seismically active systems, and a step towards apprehending the processes that drive this activity.

International audience; Future thinking (FT) is the cognitive ability that enables humans to mentally imagine and pre-experience future events. Despite a sharp increase in basic research on future thinking in the last decade, we note the lack of transfer to Human Factors and Ergonomics (HF&E), although the field is increasingly concerned by future artefacts and although theory building on future-oriented HF&E has begun (e.g. prospective ergonomics). This article gives an overview of key findings regarding future thinking, namely i) underlying cognitive mechanisms, ii) functions and obstacles, iii) common descriptors of future thinking, iv) recommendations as to the possible improvement of future thinking during user research and, v) methods for the assessment of future thinking abilities. This synthesis can support HF&E practitioners in fine-tuning their future-oriented methods.

Perceiving art is known to elicit motor cortex activation in an observer's brain. This motor activation has often been attributed to a covert approach response associated with the emotional valence of an art piece (emotional reaction hypothesis). However, recent accounts have proposed that aesthetic experiences could be grounded in the motor simulation of actions required to produce an art piece and of the sensorimotor states embedded in its subject (embodied aesthetic hypothesis). Here, we aimed to test these two hypotheses by assessing whether motor facilitation during artwork perception mirrors emotional or motor simulation processes. To this aim, we capitalized on single pulse transcranial magnetic stimulation revealing a two-stage motor coding of emotional body postures: an early, non-specific activation related to emotion processing and a later action-specific activation reflecting motor simulation. We asked art-naive individuals to rate how much they liked a series of pointillist and brushstroke canvases; photographs of artistic gardens served as control natural stimuli. After an early (150 ms) or a later (300 ms) post-stimulus delay, motor evoked potentials were recorded from wrist-extensor and finger muscles that were more involved in brushstroke- and pointillist-like painting, respectively. Results showed that observing the two canvas styles did not elicit differential motor activation in the early time window for either muscle, not supporting the emotional reaction hypothesis. However, in support of the embodied aesthetic hypothesis, we found in the later time window greater motor activation responses to brushstroke than pointillist canvases for the wrist-extensor, but not for the finger muscle. Furthermore, this muscle-selective facilitation was associated with lower liking ratings of brushstroke canvases and with greater empathy dispositions. These findings support the claim that simulation of the painter's movements is crucial for aesthetic experience, by documenting a link between motor simulation, dispositional empathy, and subjective appreciation in artwork perception.

In the present research, we provide empirical evidence for the process of symbolic integration of number associations, focusing on the development of simple addition (e.g., 5 + 3 = 8), subtraction (e.g., 5 - 3 = 2), and multiplication (e.g., 5 × 3 = 15). Canadian children were assessed twice, in Grade 2 and Grade 3 (N = 244; 55% girls). All families were English-speaking, and parent education levels ranged from high school to postgraduate, with a median of community college. In Grade 2, children completed general cognitive tasks (i.e., receptive vocabulary, working memory, nonverbal reasoning, and inhibitory control). In both grades, children completed single-digit addition and complementary subtraction problems. In Grade 3, they completed single-digit multiplication problems and measures of applied mathematics, specifically, word-problem solving, algebra, and measurement. We found that addition and subtraction were reciprocally related (controlling for cognitive skills). Subtraction fluency predicted multiplication in Grade 3, whereas addition fluency did not. In Grade 3, both subtraction and multiplication fluency were predictors of applied mathematics, with multiplication partially mediating the relation between subtraction and applied mathematics performance. These findings support the view that learning arithmetic associations is a hierarchical process. As students practice each new skill, individual differences reflect the integration of the novel component into the developing associative network. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Optimally collecting information and controlling behaviour require that we constantly scan our visual environment through eye movements. How the dynamic interaction between short-lived retinal images and extra-retinal signals of eye motion results in our subjective experience of visual stability remains a major issue in Cognitive Neuroscience. The present study aimed to assess and determine the nature of the contribution of the posterior parietal cortex (PPC) to the saccadic remapping mechanisms which contribute to such perceptual visual constancy. Perceptual responses in transsaccadic visual localization tasks were measured in a patient presenting with a PPC lesion and manifesting optic ataxia in the left hemifield with no neglect. Two perceptual localization tasks, each with versus without an intervening saccade, were used: the saccadic suppression of displacement (SSD) task (Ostendorf, Liebermann, & Ploner, 2010) and the peri-saccadic flash localization (LOC) task (Zimmerman & Lappe, 2010). Compared to a group of age-matched healthy subjects, the patient showed a specific pattern of perceptual deficits in the ataxic (left) hemifield. First, a significant impairment occurred in the stationary eye conditions, attesting for an alteration of visuo-spatial encoding. Second, in the saccade conditions, an additional perceptual deficit (an error of ~5° along the saccade direction) was observed in both tasks and mainly in conditions where extra-retinal signals are thought to be critically involved, revealing a constant underestimation by extra-retinal signals of the saccade size, despite preserved saccade accuracy. These findings highlight a crucial role of the PPC in saccadic remapping processes underlying perceptual visual constancy and provide empirical evidence for models such as Ziesche and Hamker's (2014).

Breast cancer patients have frequent complaints of sleep disturbances. Sleep plays a major role in cognitive functioning, especially in executive functions, such as planning or flexibility, and also in memory consolidation. These cognitive functions are among the most frequently impaired in breast cancer. However, the influence of sleep on cognitive performance in patients treated for breast cancer has been little investigated. In addition, the physio-pathological mechanisms associated with sleep disturbances in breast cancer patients are not clear for now. The objective of this non-exhaustive review is to describe sleep alterations encountered in breast cancer, their potential mechanisms and to link these alterations with cognitive difficulties of patients. The studies conducted until now revealed the existence of a sleep complaint, with mainly insomnia symptoms, in breast cancer patients. These results are in accordance with those of studies using actigraphy after chemotherapy. Polysomnography (PSG) studies also suggest alterations in sleep architecture, but these studies are scarce and suffer from several limitations. Sleep alterations have mainly been studied in the context of chemotherapy. However, sleep alterations are little studied in case of other treatments, such as hormonal therapy, or even in the absence of treatment. Recent studies have highlighted the potential role of sleep–wake cycle alterations and sleep apnea in breast cancer occurrence and survival; however, this association still needs to be more deeply evaluated. Finally, the links between objective sleep alterations and cognition are still little explored. A better understanding of sleep disorders in breast cancer will allow adapting the treatment in order to improve patients’ quality of life., Les patientes atteintes d’un cancer du sein se plaignent fréquemment d’une altération de leur sommeil. Ce dernier joue un rôle crucial dans le fonctionnement cognitif, notamment dans les fonctions exécutives telles que la planification ou la flexibilité, ou encore dans la consolidation des souvenirs en mémoire à long terme. Ces fonctions cognitives sont fréquemment altérées dans le cancer du sein. Cependant, l’influence du sommeil sur les performances cognitives reste peu documentée dans cette pathologie. En outre, les mécanismes physiopathologiques associés aux troubles du sommeil dans le cancer du sein sont, actuellement, mal compris. L’objectif de cette mise au point est de faire un état de l’art des altérations du sommeil rencontrées dans le cancer du sein, de décrire les potentiels mécanismes impliqués et de mettre en lien ces altérations avec les troubles cognitifs. Les études réalisées jusqu’ici auprès de patientes atteintes d’un cancer du sein révèlent l’existence d’une plainte de sommeil, avec principalement des symptômes évocateurs d’insomnie. Ces résultats sont en accord avec les données obtenues en actimétrie après chimiothérapie. Les études en polysomnographie (PSG) suggèrent également des altérations de l’architecture du sommeil, mais ces études sont encore peu nombreuses et souffrent de plusieurs limites. Les altérations du sommeil ont été majoritairement décrites chez des patientes traitées par chimiothérapie. En revanche, elles sont peu étudiées dans le cadre d’autres traitements, tels que l’hormonothérapie, ou même en dehors des traitements. Des études récentes mettent en avant les effets potentiellement carcinogènes des altérations du rythme activité–repos et des apnées, mais la causalité de ces effets doit être confirmée. Enfin, les liens existant entre les altérations du sommeil et la cognition sont encore peu explorés, notamment à l’aide de mesures objectives du sommeil. Une meilleure compréhension des troubles du sommeil dans le cancer du sein permettra d’adapter la prise en charge afin d’améliorer, à terme, la qualité de vie des patientes.

In this study we aim to observe if intentions are conveyed by a relevant conversational context in a chatbot interface and if it influences decision-making. We created two conditions using the alternate counter-offer version of the ultimatum game in 2 negotiation settings: face-to-face and through a chatbot. There are two inter-locutors: the proposer and the respondent. The proposer must share 10 units with the respondent. If the respondent accepts the units are shared while everyone loses if the respondent refuses. 92 participants took part in this study: 62 in the chat-bot condition and 30 in the face-to-face condition. Participants faced three player profiles: stochastic, selfish, and rational. Results show that participants decrease the value of the offer more easily in the chatbot condition with the selfish profile. We conclude that the intentions are correctly conveyed by the profiles even in a chatbot-like negotiation despite the absence of non-verbal behaviors.

Exceptionality effect is the widely cited phenomenon that people experience stronger regret for negative outcomes that are a result of more exceptional circumstances, compared to routine. We hypothesize that the exceptionality-routine attribution asymmetry would extend to attributions of freedom and responsibility. In Experiment 1 (N = 338), we found that people attributed more free will to an exceptional behavior compared to a routine one, when the exception was due to self-choice rather than external circumstances. In Experiment 2 (N = 561), we replicated and generalized the effect of exceptionality on attributions of free will to other scenarios, with support for the classic exceptionality effect regarding regret and an extension to moral responsibility. In Experiment 3 (N = 128), we replicated these effects in a within-subject design. When using a classic experimental philosophy paradigm contrasting a deterministic and an indeterministic universe, we found that the results were robust across both contexts. We conclude that there is a consistent support for a link between exceptionality and free will attributions.

International audience; Things we can say, and the ways in which we can say them, compete with one another. And this has consequences: words we decide not to pronounce have critical effects on the messages we end up conveying. For instance, in saying Chris is a good teacher, we may convey that Chris is not an amazing teacher. How this happens is an unsolvable problem, unless a theory of alternatives indicates what counts, among all the things that have not been pronounced. It is sometimes assumed, explicitly or implicitly, that any word counts, as long as that word could have replaced one that was actually pronounced. We review arguments for going beyond this powerful idea. In doing so, we argue that the level of words is not the right level of analysis for alternatives. Instead, we capitalize on recent conceptual and associated methodological advances within the study of the so-called "language of thought" to reopen the problem from a new perspective. Specifically, we provide theoretical and experimental arguments that the relation between alternatives and words may be indirect, and that alternatives are not linguistic objects in the traditional sense. Rather, we propose that competition in language is better seen as primarily determined by general reasoning preferences, or thought preferences (preferences that may have forged the lexicons of modern languages in the first place, as argued elsewhere). We propose that such non-linguistic preferences can be measured and that these measures can be used to explain linguistic competition, nonlinguistically, and more in depth.

The neurocognitive basis of elementary academic skills varies with parental socioeconomic status (SES). Little is known, however, about SES‐related differences underlying higher‐order cognitive skills that are critical for school success, such as reasoning. Here we used fMRI to examine how the neurocognitive basis of deductive reasoning varies as a function of parental education in school‐aged children. Higher parental education was associated with greater reliance on the left inferior frontal gyrus when solving set‐inclusion problems, consistent with other work suggesting that these problems might more heavily rely on verbal systems in the brain. In addition, children who are at the lower end of the parental education continuum, but have higher nonverbal skills relied on right parietal areas to a greater degree than their peers for solving set‐inclusion problems. Finally, lower parental education children with higher verbal or nonverbal skill engaged dorsolateral prefrontal regions to a greater degree for set‐inclusion and linear‐order relations than their peers. These findings suggest that children with lower parental education rely on spatial and cognitive control mechanisms to achieve parity with their peers with parents who have more education. Better understanding variability in the neurocognitive networks that children recruit as a function of their parental factors might benefit future individualized interventions that best match children's characteristics., Higher parental education was associated with greater reliance on the left inferior frontal gyrus when solving set‐inclusion reasoning problems, consistent with other work suggesting that these problems might more heavily rely on verbal systems in the brain. Children who are at the lower end of the parental education continuum, but have higher nonverbal skills relied on right parietal areas to a greater degree than their peers for solving set‐inclusion problems. Finally, lower parental education children with higher verbal or nonverbal skill engaged dorsolateral prefrontal regions to a greater degree for set‐inclusion and linear‐order relations than their peers.

Studies related to creativity generally investigate cognition and brain functioning linked to creative achievement. However, this approach does not allow characterization of creative potential. To better define creative potential, we studied cognitive function related to creative processes and the associated brain resting functional connectivity. Therefore, in this pilot study, we constructed a cognitive functioning model via structural equation modeling assuming an influence of working memory (WM) and analytical thinking on creativity assessed by the Torrance Tests of Creative Thinking. On the basis of this model, we differentiated two groups with different functioning levels on the basis of their creative score. We identified one group as the high-creative potential group, with a positive correlation between WM and creativity and a negative correlation between analytical thinking and creativity. The other group was the low-creative potential group, with no correlation between WM and creativity and a negative correlation between analytical thinking and creativity. Then, we examined brain functional connectivity at rest and found that the high-creative potential group had increased connectivity in the attentional network (AN) and default-mode network (DMN) and decreased connectivity in the salience network (SN). Our findings highlight the involvement of the AN. We, therefore, linked this network to creative potential, which is consistent with cognitive theories suggesting that creativity is underpinned by attentional processes.

International audience; In order to consider the relevant relationships between emotion, information processing and judicial judgment, this study evaluated the impact of positive (amusement), negative (sadness) or neutral mood induction on 128 mock jurors' visual attentional focus, as measured by their eye fixations on the face of a witness filmed while giving testimony in a criminal court. Participants then rated their perceptions of the witness's and their own emotions on the Differential Emotional Scale, before indicating their final judicial judgment. As expected, results showed that sadness can favor information processing in a in more effortful mode, with more steady visual attention, while a positive emotional state such as amusement can favor information processing based more on the witness's emotions, a source of useful clues for establishing the judicial judgment. These results are discussed in relation to how the cognitive approach can shed light on the processes underlying judicial judgment.

Are we gullible? Can we be easily influenced by what others tell us, even if they do not deserve our trust? Many strands of research, from social psychology to cultural evolution suggest that humans are by nature conformist and eager to follow prestigious leaders. By contrast, an evolutionary perspective suggests that humans should be vigilant towards communicated information, so as not to be misled too often. Work in experimental psychology shows that humans are equipped with sophisticated mechanisms that allow them to carefully evaluate communicated information. These open vigilance mechanisms lead us to reject messages that clash with our prior beliefs, unless the source of the message has earned our trust, or provides good arguments, in which case we can adaptively change our minds. These mechanisms make us largely immune to mass persuasion, explaining why propaganda, political campaigns, advertising, and other attempts at persuading large groups nearly always fall in deaf ears. However, some false beliefs manage to spread through communication. I argue that most popular false beliefs are held reflectively, which means that they have little effect on our thoughts and behaviors, and that many false beliefs can be socially beneficial. Accepting such beliefs thus reflects a much weaker failure in our evaluation of communicated information than might at first appear.

International audience; The aim of this experiment was to investigate the postural response to specific types of long-term memory (episodic vs. semantic) in young adults performing an unperturbed upright stance. Although a similar level of steadiness (mean distance) was observed, dual tasking induced a higher velocity, more energy in the higher frequency range (power spectral density), and less regularity (sample entropy) compared with a simple postural task. Moreover, mean velocity was always greater in the semantic than in the episodic task. The differences in postural control during dual tasking may result from the types of processes involved in the memory task. Findings suggest a spatial process sharing between posture and episodic memory.

Recent research has focused on assessing either event- or time-based prospective memory (PM) using laboratory tasks. Yet, the findings pertaining to PM performance on laboratory tasks are often inconsistent with the findings on corresponding naturalistic experiments. Ecologically valid neuropsychological tasks resemble the complexity and cognitive demands of everyday tasks, offer an adequate level of experimental control, and allow a generalisation of the findings to everyday performance. The Virtual Reality Everyday Assessment Lab (VR-EAL), an immersive virtual reality neuropsychological battery with enhanced ecological validity, was implemented to comprehensively assess everyday PM (i.e., focal and non-focal event-based, and time-based). The effects of the length of delay between encoding and initiating the PM intention and the type of PM task on everyday PM performance were examined. The results revealed that everyday PM performance was affected by the length of delay rather than the type of PM task. The effect of the length of delay differentially affected performance on the focal, non-focal, and time-based tasks and was proportional to the PM cue focality (i.e., semantic relationship with the intended action). This study also highlighted methodological considerations such as the differentiation between functioning and ability, distinction of cue attributes, and the necessity of ecological validity., Comment: 9 Figures, 4 Tables

Artificial language games give researchers the opportunity to investigate the emergence and evolution of semantic structure, i.e. the organisation of meaning spaces into discrete categories. A possible issue with this approach is that categories mightcarry over from participants’ native languages, a potential bias that has mostly been ignored. In a referential communication game, we compare colour terms from three different languages to those of an artificial language. We assess the similarity of the semantic structures and test the influence of the semantic structure on artificial language communication by comparing to a separate online naming task providing us with the native language semantic structure. Our results show that native and artificial language structures overlap at least moderately. Furthermore, communicative behaviour and performance were influenced by the shared semantic structure, but only for English-speaking pairs. These results imply a cognitive link between participants’ semantic structures and artificial language structure formation. Introduction Artificial language games, semantic structure, and possible biases Colour terms and categorical facilitation Method - The Color Game -- Participants -- Materials -- Procedure - Online survey -- Participants -- Materials -- Procedure - Predictions Results - Predictions 1 - Predictions 2.1 - Predictions 2.2 - Predictions 2.3 - Predictions 4 Discussion Conclusion

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This study examined the possibility that moderators of false memories in the Deese-Roediger-McDermott (DRM) paradigm affect the occurrence of false memories in the misinformation paradigm. More precisely, the purpose was to determine to what extent an imaging instruction modulates false memories in the DRM and misinformation paradigms. A sample of young adults was assigned to the DRM or the misinformation tasks, either in control conditions or in conditions including an imaging instruction. Findings revealed that an imaging instruction decreases false memories in DRM whereas there is no evidence about imaging effects in the misinformation task. These observations tally with previous studies, reporting a weak or no correlation between false memories in these paradigms, and are discussed in the light of current theories.

A brain-computer interface (BCI) based on electroencephalography (EEG) is a promising technology for enhancing virtual reality (VR) applications-in particular, for gaming. We focus on the so-called P300-BCI, a stable and accurate BCI paradigm relying on the recognition of a positive event-related potential (ERP) occurring in the EEG about 300 ms post-stimulation. We implemented a basic version of such a BCI displayed on an ordinary and affordable smartphone-based head-mounted VR device: that is, a mobile and passive VR system (with no electronic components beyond the smartphone). The mobile phone performed the stimuli presentation, EEG synchronization (tagging) and feedback display. We compared the ERPs and the accuracy of the BCI on the VR device with a traditional BCI running on a personal computer (PC). We also evaluated the impact of subjective factors on the accuracy. The study was within-subjects, with 21 participants and one session in each modality. No significant difference in BCI accuracy was found between the PC and VR systems, although the P200 ERP was significantly wider and larger in the VR system as compared to the PC system., Comment: IEEE Transactions on Games, Institute of Electrical and Electronics Engineers, In press

International audience; Fuzzy set theory has been criticized for building on an ill-understood notion, viz., that of graded membership. To address this concern, recent work has proposed an operational definition of this notion, which experimental studies have subsequently shown to make accurate predictions regarding people's judgments of degrees of membership. It is still an open question whether analogous positive results can be obtained for more complex fuzzy concepts, for instance, concepts that can be modeled as intersections of fuzzy sets. The present paper makes a beginning with answering this question. It reports results of an experimental study that derived degrees of membership for a conjunctive concept from the outcomes of the aforementioned studies and then compared these predicted degrees with the degrees as judged by participants. Degrees of membership were derived using all of the better-known fuzzy intersection operators, and thus the results of the study also shed new light on the question of the empirical adequacy of those operators.

International audience

International audience; There are two primary investigative interview objectives: gathering information to determine what happened and who did it and assessing the witness’s reliability. The present study examined to what extent investigative interviewers gather investigation-relevant information (IRI) compared to interviewee details (ID) to assess witness reliability. As part of a training course, 42 police officers participated as interviewers and mock witnesses by viewing a crime video. The interviews were recorded and rated for question type and question content through thematic analyses. IRI questions accounted for 78% of the questions asked, while ID questions accounted for 22% of the questions asked. The police officers assessed the way witnesses perceived this information and the attendant meta-processes and used more inappropriate questions than appropriate questions. These results help to elucidate the objectives of police interviews that should be considered when evaluating witness performances in laboratory settings and when developing effective interviewing protocols.

International audience

The aim of this study was to examine the developmental trajectories of comprehension of relational concepts among 557 participants with intellectual disability (ID) of undifferentiated etiology (M age = 12.20 years, SD = 3.18) and 557 typically developing (TD) participants (M age = 4.57 years, SD = 0.80). Logistic regression analyses, with nonverbal cognitive level entered first in the equations, showed only negligible differences with regard to the discriminative power of each of the 72 concepts used as outcome variables, and moderate differences in difficulty for only three items. A moderate mixed effect (i.e., combining a group difference in difficulty and discriminative power) was observed for a fourth item. It is concluded that the developmental trajectories of relational concepts are similar for participants with or without ID. The implications and limitations of the study are discussed.

International audience

International audience; Social trust is at the center of democratic societies but it varies considerably between individuals and societies, which deeply affects a range of prosocial behaviours. Socioeconomic status has been identified as an important predictor of such variability. Although this association has mostly been reported for measures of socioeconomic status taken in adulthood, recent studies have found unique effects of harsh conditions experienced during childhood on social trust assessed decades later. Here, we report a series of three studies that provide further support for the long-lasting association between early childhood conditions and social trust. The first study revealed that higher childhood socioeconomic status was associated with greater social trust in a diverse sample of French participants (N=915), even after adjusting for current socioeconomic status. The second study replicated this result using data from the European Values Study, an independent large-scale survey of 46 European countries (N=66,281). Finally, the last study found a similar association between socioeconomic status and willingness to invest in a trust game (N=60 in original study, N=75 in replication study).

Objectif L’objectif de cette étude était de valider une version française de l’échelle de satisfaction sexuelle. Méthode Un total de 646 participants, 468 femmes et 178 hommes âgés en moyenne de 35,18 ans (ET: 13,77), ont rempli en ligne 3 questionnaires: l’échelle de satisfaction sexuelle (Comeau & Boisvert, 1985), l’échelle d’évaluation de l’anxiété et de la dépression (Hospital Anxiety and Depression Scale, HADS) et l’échelle d’ajustement dyadique à 16 items (Dyadic Adjustment Scale-16, DAS-16). Résultat L’analyse de la distribution des items, les corrélations inter-items et items-score total ainsi que l’analyse hiérarchique des facteurs obliques ont conduit à l’exclusion de 6 items. Une analyse factorielle confirmatoire de cette version à 19 items a montré des indicateurs satisfaisants (RMSEA = 0,012 ; SRMR = 0,065 ; CFI = 0,999 ; TLI = 0,999 ; GFI = 0,99) et l’alpha de Cronbach est de 0,96. L’échelle mesure un facteur général de satisfaction sexuelle. Conclusion Cette étude a permis d’obtenir une version française de l’échelle de satisfaction sexuelle en 19 items proposant ainsi une mesure auto-rapportée valide et fiable de la satisfaction sexuelle. Les résultats ont été discutés à la lumière de leurs implications cliniques et scientifiques. Objectives The objective of this study was to validate a French version of the Index of Sexual Satisfaction. This unidimensional scale, the most widely used in international studies, evaluates sexual satisfaction in the context of couple relationships. Methods A total of 646 participants, 468 women and 178 men with an average age of 35.18 years old (SD: 13.77), completed 3 questionnaires: the French version of the Index Sexual Satisfaction (Comeau & Boisvert, 1985), the Hospital Anxiety and Depression scale (HADS) and the Dyadic Adjustment Scale-16 (DAS-16) online. Analyses were conducted in three stages: (1) descriptive, correlational and exploratory factorial analyses to verify the properties of the items; (2) confirmatory analyses to confirm the version obtained; and (3) concurrent validity analysis. Results The analysis of the distribution of the items, the inter-item and item-total correlations, and the hierarchical oblique factor analysis led to the exclusion of 6 items. Confirmatory factor analysis of this 19-item version showed satisfactory indicators (RMSEA = 0.012; SRMR = 0.065; CFI = 0.999; TLI = 0.999; GFI = 0.99) and Cronbach's alpha is 0.96. The results revealed that men are more sexually dissatisfied. The ISS-19 score is moderately and positively correlated with age and length of relationship. Finally, the correlations showed that depression is associated with a decrease in sexual satisfaction while the quality of interactions is associated with an increase in sexual satisfaction. The scale measures a general factor of sexual satisfaction. Conclusion This study provided a 19-item French version of the Index of Sexual Satisfaction, providing a valid and reliable self-reported measure of sexual satisfaction. The results were discussed in light of their clinical and scientific implications. 67;1

There have been many attempts at classifying the semantic modification relations (ℜ) of N + N compounds but this work has not led to the acceptance of a definitive scheme, so that devising a reusable classification is a worthwhile aim. The scope of this undertaking is extended to other binominal lexemes, i.e. units that contain two thing-morphemes without explicitly stating ℜ, like prepositional units, N + relational adjective units, etc. The 25-relation taxonomy of Bourque (2014) was tested against over 15,000 binominal lexemes from 106 languages and extended to a 29-relation scheme (“Bourque2”) through the introduction of two new reversible relations. Bourque2 is then mapped onto Hatcher’s (1960) four-relation scheme (extended by the addition of a fifth relation, similarity, as “Hatcher2”). This results in a two-tier system usable at different degrees of granularities. On account of its semantic proximity to compounding, metonymy is then taken into account, following Janda’s (2011) suggestion that it plays a role in word formation; Peirsman and Geeraerts’ (2006) inventory of 23 metonymic patterns is mapped onto Bourque2, confirming the identity of metonymic and binominal modification relations. Finally, Blank’s (2003) and Koch’s (2001) work on lexical semantics justifies the addition to the scheme of a third, superordinate level which comprises the three Aristotelean principles of similarity, contiguity and contrast.

The complex span task used to evaluate working memory (WM) capacity has been considered to be the most predictive task of fluid intelligence. However, the structure of the complex span tasks varies from one study to another, and it has not been questioned yet whether these variants could influence the predictive power of these tasks. Previous studies have typically used either structures based on alternating processing-storage patterns or alternating storage-processing patterns. We present one experiment in which the participants were submitted to both the processing-storage vs. storage-processing types. After completing both types of complex span tasks, the participants performed a reasoning test (Matrix Reasoning of the Wechsler Adult Intelligence Scale - WAIS-IV). The results showed a significant difference in the WM spans between the two conditions, with higher spans observed in the processing-storage alternating structure, and different serial position curves. However, the correlations showed that both types of tasks remained equally predictive of performance in the reasoning test. These results are discussed in regard to the time-based resource-sharing model.

That saccadic reaction times (SRTs) may depend on reinforcement contingencies has been repeatedly demonstrated. It follows that one must be able to discriminate one’s latencies to adequately assign credit to one’s actions, which is to connect behaviour to its consequence. To quantify the ability to perceive one’s SRT, we used an adaptive procedure to train sixteen participants in a stepping visual target saccade paradigm. Subsequently, we measured their RTs perceptual threshold at 75% in a conventional constant stimuli procedure. For each trial, observers had to saccade to a stepping target. Then, in a 2-AFC task, they had to choose one value representing the actual SRT, while the other value proportionally differed from the actual SRT. The relative difference between the two alternatives was computed by either adding or subtracting from the actual SRT a percent-difference value randomly chosen among a fixed set. Feedback signalling the correct choice was provided after each response. Overall, our results showed that the 75% SRT perceptual threshold averaged 23% (about 40 ms). The ability to discriminate small SRT differences provides support for the possibility that the credit assignment problem may be solved even for short reaction times.

International audience; Problem-solving strategies in visual reasoning tasks are often studied based on the analysis of eye movements, which yields high-quality data but is costly and difficult to implement on a large scale. We devised a new graphical user interface for matrix reasoning tasks where the analysis of computer mouse movements makes it possible to investigate item exploration and, in turn, problem-solving strategies. While relying on the same active perception principles underlying eye-tracking (ET) research, this approach has the additional advantages of being user-friendly and easy to implement in real-world testing conditions, and records only voluntary decisions. A pilot study confirmed that embedding items of Raven's Advanced Progressive Matrices (APM) in the interface did not significantly alter its psychometric properties. Experiment 1 indicated that mouse-based exploration indices, when used to assess two major problem-solving strategies in the APM, are related to final performance—as has been found in past ET research. Experiment 2 suggested that constraining some features of the interface favored the adoption of the more efficient solving strategy for some participants. Overall, the findings support the relevance of the present methodology for accessing and manipulating problem-solving strategies.

Despite the obvious personal relevance of some musical pieces, the cerebral mechanisms associated with listening to personally familiar music and its effects on subsequent brain functioning have not been specifically evaluated yet. We measured cerebral correlates with functional magnetic resonance imaging (fMRI) while composers listened to three types of musical excerpts varying in personal familiarity and self (familiar own/composition, familiar other/favorite or unfamiliar other/unknown music) followed by sequences of names of individuals also varying in personal familiarity and self (familiar own/own name, familiar other/close friend and unfamiliar other/unknown name). Listening to music with autobiographical contents (familiar own and/or other) recruited a fronto-parietal network including mainly the dorsolateral prefrontal cortex, the supramarginal/angular gyri and the precuneus. Additionally, while listening to familiar other music (favorite) was associated with the activation of reward and emotion networks (e.g. the striatum), familiar own music (compositions) engaged brain regions underpinning self-reference (e.g. the medial prefrontal cortex) and visuo-motor imagery. The present findings further suggested that familiar music with self-related reference (compositions) leads to an enhanced activation of the autobiographical network during subsequent familiar name processing (as compared to music without self-related reference); among these structures, the precuneus seems to play a central role in personally familiar processing.

Objective:In neurological diseases, metacognitive judgements have been widely used in order to assess the degree of disease awareness. However, as yet little research of this type has focused on multiple sclerosis (MS).Method:We here focused on an investigation of item-by-item metacognitive predictions (using feeling-of-knowing judgements) in episodic and semantic memory and global metacognitive predictions in standard neuropsychological tests pertinent to MS (processing speed and verbal fluency). Twenty-seven relapsing–remitting MS (RR-MS) patients and 27 comparison participants took part.Results:We found that RR-MS patients were as accurate as the group of comparison participants on our episodic and semantic item-by-item judgements. However, for the global predictions, we found that the MS group initially overestimated their performance (ds = .64), but only on a task on which performance was also impaired (ds = .89; processing speed). We suggest that MS patients, under certain conditions, show inaccurate metacognitive knowledge. However, postdictions and item-by-item predictions indicate that online metacognitive processes are no different from participants without MS.Conclusion:We conclude that there is no monitoring deficit in RR-MS and as such these patients should benefit from adaptive strategies and symptom education.

Basic notions linked with concept theory can be accounted for by partial order relations. These orders translate the fact that, for an agent, an object may be seen as a better or a more typical exemplar of a concept than anyother. They adequately model notions linked with categorial membership, typicality and resemblance, without any of the drawbacks that are classically encountered in conjunction theory. An interesting consequence of such a concept representation is the possibility of using the tools of non-monotonic logic to address some well-known problems of cognitive psychology. Thus, conceptual entailment and concept induction can be reexamined in the framework of preferential inference relations. This leads to a rigorous definition of the basic notions used in the study of category-based induction.

International audience; During their second year of life, infants develop a rudimentary understanding of grammatical categories based on their knowledge and use of frequent function words. The current study inquired whether, at only 14 months of age, infants can track co-occurrence patterns between function words and content words (e.g., determiners can precede nouns, pronouns can precede verbs), and use these previously encountered syntactic contexts to build expectations about which function words can co-occur with novel words. Using a habituation paradigm, Frenchlearning 14-month-olds were presented with utterances containing two novel words preceded by function words (either two determiners in the Novel Noun condition, or two pronouns in the Novel Verbs conditions). We found that at test, infants looked longer during trials in which the novel words occurred in an unexpected syntactic context (following a pronoun for infants in the Novel Nouns condition and following a determiner for infants in the pooled analysis of the three Novel Verb conditions). Hence, our results confirm previous findings on infants' sensitivity to noun contexts, and most importantly demonstrate that their sensitivity to the cooccurrence of verbs with pronouns begins much earlier than previously understood.

International audience; Mobile devices are widely used throughout parent–child routines and family life. Emerging research suggests several concerns about the effects of their use on children’s socio-emotional development. These concerns have led to a proliferation of prevention messages. The recommendations focus mainly on infants/preschoolers and adolescents, and very little on school-aged children. Despite growing concerns among health and childhood professionals, there are few studies regarding children’s use of digital devices focusing on the developmental period between 6 and 12 years of age. In order to frame guidelines for the use of digital devices in the home, it is important to know parents’ questions and/or difficulties arising from their use. The aim of this study was to question parents of school-aged children (6–12 years) regarding their fears, questions, and concerns relative to digital device use in the home and, more generally, raising children in a digital world. One hundred and forty-seven French parents responded to an anonymous online survey. The questions addressed school-aged children’s digital device use, parental concerns and parental experiences of the place of digital devices in the home. Parent’s reports of their children’s use of digital devices were analyzed as a function of their children’s age, gender, birth order and parent’s sociodemographic characteristics. Results showed that the use of screens by children is a source of concern for 53.1% of parents, while 62.6% of parents consider that the use of information and communication technology in the home affects (positively or negatively) their relationship with their child.

International audience; Recent studies on the remediation of speech disorders suggest that providing visual information of speech articulators may contribute to improve speech production. In this study, we evaluate the effectiveness of an illustration-based rehabilitation method on speech recovery of a patient with non-fluent chronic aphasia. The Ultraspeech-player software allowed visualization by the patient of reference tongue and lips movements recorded using ultrasound and video imaging. This method can improve the patient's awareness of their own lingual and labial movements, which can increase the ability to coordinate and combine articulatory gestures. The effects of this method were assessed by analyzing performance during speech tasks, the phonological processes identified in the errors made during the phoneme repetition task and the acoustic parameters derived from the speech signal. We also evaluated cognitive performance before and after rehabilitation. The integrity of visuo-spatial ability, short-term and working memory and some executive functions supports the effectiveness of the rehabilitation method. Our results showed that illustration-based rehabilitation technique had a beneficial effect on the patient's speech production, especially for stop and fricative consonants which are targeted (high visibility of speech articulator configurations) by the software, but also on reading abilities. Acoustic parameters indicated an improvement in the distinction between consonant categories: voiced and voiceless stops or alveolar, post-alveolar and labiodental fricatives. However, the patient showed little improvement for vowels. These results confirmed the advantage of using illustration-based rehabilitation technique and the necessity of detailed subjective and objective intra-speaker evaluation in speech production to fully evaluate speech abilities.

Does phonology contribute to effects of orthographically related flankers in the flankers task? In order to answer this question, we implemented the flanker equivalent of a pseudohomophone priming manipulation that has been widely used to demonstrate automatic phonological processing during visual word recognition. In Experiment 1, central target words were flanked on each side by either a pseudohomophone of the target (e.g., roze rose roze), an orthographic control pseudoword (rone rose rone), or an unrelated pseudoword (mirt rose mirt). Both the pseudohomophone and the orthographic control conditions produced faster and more accurate responses to central targets, but performance in these two conditions did not differ significantly. Experiment 2 tested the same stimuli in a masked priming paradigm and replicated the standard finding in French that pseudohomophone primes produce significantly faster responses to target words than orthographic control primes. Therefore, contrary to its impact on masked priming, phonology does not contribute to effects of flanker relatedness, which would appear to be driven primarily by orthographic overlap. Electronic supplementary material The online version of this article (10.3758/s13414-020-02023-0) contains supplementary material, which is available to authorized users.

International audience; The default mode network (DMN) is believed to subserve the baseline mental activity in humans. Its higher energy consumption compared to other brain networks and its intimate coupling with conscious awareness are both pointing to an unknown overarching function. Many research streams speak in favor of an evolutionarily adaptive role in envisioning experience to anticipate the future. In the present work, we propose a process model that tries to explain how the DMN may implement continuous evaluation and prediction of the environment to guide behavior. The main purpose of DMN activity, we argue, may be described by Markov Decision Processes that optimize action policies via value estimates based through vicarious trial and error. Our formal perspective on DMN function naturally accommodates as special cases previous interpretations based on (1) predictive coding, (2) semantic associations, and (3) a sentinel role. Moreover, this process model for the neural optimization of complex behavior in the DMN offers parsimonious explanations for recent experimental findings in animals and humans.

Summary Regularized generalized canonical correlation analysis (RGCCA) is a general multiblock data analysis framework that encompasses several important multivariate analysis methods such as principal component analysis, partial least squares regression, and several versions of generalized canonical correlation analysis. In this article, we extend RGCCA to the case where at least one block has a tensor structure. This method is called multiway generalized canonical correlation analysis (MGCCA). Convergence properties of the MGCCA algorithm are studied, and computation of higher-level components are discussed. The usefulness of MGCCA is shown on simulation and on the analysis of a cognitive study in human infants using electroencephalography (EEG).

International audience; This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. Abstract Infants' social-cognitive skills first develop within the parent infant relationship, but large differences between parents exist in the way they approach and interact with their infant. These may have important consequences for infants' social-cognitive development. The current study investigated effects of maternal sensitive and intrusive behavior on 6-to 7-month-old infants' ERP responses to a socio-emotional cue that infants are often confronted with from an early age: emotional prosody in infant-directed speech. Infants may differ in their sensitivity to environmental (including parenting) influences on development, and the current study also explored whether infants' resting frontal asymmetry conveys differential susceptibility to effects of maternal sensitivity and intrusiveness. Results revealed that maternal intrusiveness was related to the difference in infants' ERP responses to happy and angry utterances. Specifically, P2 amplitudes in response to angry sounds were less positive than those in response to happy sounds for infants with less intrusive mothers. Whether this difference reflects an enhanced sensitivity to emotional prosody or a (processing) preference remains to be investigated. No evidence for differential susceptibility was found, as infant frontal asymmetry did not moderate effects of sensitivity orintrusiveness.

The relevance of seesaw devices in postural evaluation and training is gathering growing evidence due to its sensory-motor specificity. Nonetheless, the physiological specificities resulting from the dissociation or not of the seesaws (single vs double) still need to be investigated, in particular by assessing the respective contribution of automatic and voluntary components in the postural control. A protocol based on attention disturbance through a dual-task paradigm was set to establish this contribution. The general assumption was that the larger the dual-task effects, the larger the voluntary component contribution. Based on the larger postural sway induced by the dissociated seesaws, it is expected that the larger dual-task effect occurs in that latter case. The subjects were required to stand with eyes closed on solid ground (SG), a single (SS) and a double (DS) seesaw device while mentally solving or not a navigation task. The movements of the seesaw, placed on a double force platform, were assessed through a frequency analysis of the resultant center-of-pressure displacements along both mediolateral and anteroposterior axes. A larger contribution (p

International audience; Current theories posit multiple levels of cognitive control for resolving conflict, including list-level control: the global or proactive biasing of attention across a list of trials. However, to date, evidence for pure list-level control has largely been confined to the Stroop task. Our goals were twofold: (a) test the generality of theoretical accounts by seeking evidence for list-level control in the letter flanker task, using an established method involving diagnostic items, and investigating the conditions under which list-level control may and may not be observed and (b) develop and test a potential solution to the challenge of isolating list-level control in tasks with a relatively limited set of stimuli and responses such as arrow flanker. Our key findings were that list-level control was observed for the first time in a letter flanker task on diagnostic items (Experiment 1), and it was not observed when the design was altered to encourage learning and use of simple stimulus–response associations (Experiment 2). These findings support the generalisability of current theoretical accounts positing dual-mechanisms or multiple levels of control, and the associations as antagonists to control account positing that list-level control may be a last resort, to conflict tasks besides Stroop. List-level control was also observed in the arrow flanker task using a modified design (Experiment 3), which could be extended to other conflict tasks with limited sets of stimuli (four or fewer), although this solution is not entirely free of confounds.

Significance Discriminating quickly where another person's gaze is directed is a key component of social interaction, as gaze direction conveys information about others' intentions (approach or avoidance) and shift in gaze is used in group conversation. This study shows that patients with glaucoma are delayed in their discrimination of gaze direction. Purpose The purpose of this study was to investigate whether glaucoma affects the perception of gaze direction. Methods Twenty-four patients with open-angle glaucoma, 24 age-matched controls, and 20 young normally sighted controls were presented with faces displayed centrally for 200 milliseconds. The gaze could either be direct or averted, and the head could be a frontal view or a rotated view. Half of the participants in each group were asked to press a key only for faces with a direct gaze. The other half responded for a face with an averted gaze. The orientation of the head had to be ignored. Results Accuracy was greater than 90% correct for all three groups. We found no difference in performance between young and older controls, except for shorter response times for the frontal view than for the rotated face in young participants. Patients with glaucoma needed on average 140 milliseconds longer to decide if the gaze was averted than for the direct gaze, and they were less accurate than controls in perceiving the gaze as direct when the head was rotated. Conclusions Patients with glaucoma often experience impaired vision due to a reduced sensitivity in central vision. Although lower central sensitivity had little effect on their ability to discriminate gaze orientation, they required on average 140 milliseconds longer than age-matched controls to perceive an averted gaze.