Le développement des capacités de jugement des durées chez l'enfant

For several decades, since the work of Piaget, it has been believed that correct judgements of durations require sophisticated reasoning abilities that emerge at about 8 years of age. However, some researchers have demonstrated accurate temporal knowledge in young children and have explained their poor judgements on classical piagetian tasks not by their inability to correctly judge time, but by age-related attentional difficulties. Recently, researchers have thus reassessed the temporal behaviour in children with the experimental paradigms used in animals and humans adults in the framework of the temporal information processing models that assume the existence of an internal clock. Findings suggest that this type of clock is functional at an early age. Other findings allow us to better understand the role of the development of attention, memory and metacognitive processes in the development of the abilities to judge time. The aim of this article is to synthesize these recent findings.     

Origines et développement des théories d’horloge interne du temps psychologique

The article describes the origins and development of internal clock theory. The history is traced via body temperature studies in the 1920s and 1930s, with input from 19th. century and early 20th. century psychophysics, through to the model of Treisman (1963). This model derived timed behaviour from an interaction of internal clock, memory store, and comparison processes. A successor to Treisman's model was the scalar expectancy theory (SET) of Gibbon and colleagues (1984). The origins of SET in animal Psychology are described, as is its application to human timing (in the early 1990s), in particular recent work on the operation of the internal clock itself. Finally, a discussion of some recent developmental studies of timing illustrates both how internal clock models have been applied, and how modern research may require a reconceptualization of the operation of classical internal clock models.     

Psychologie sociale et perception du temps : l'estimation temporelle des stimuli sociaux et émotionnels

Two experiments using a temporal bisection task investigated the influence of the social meaning of stimuli on the estimation of their duration. The results showed that: a) the duration of faces expressing diverse emotional states was overestimated relative to the duration of neutral faces; b) the duration of faces representing elderly people was underestimated relative to the duration of faces representing young people. In both cases, this influence was found to appear at the earliest stage of the estimation process, modulating the rhythm of the estimator's internal clock. In the discussion, we suggest three different perspectives to account for the observed link between social and temporal perception.     

Un modèle neurobiologique de la perception et de l'estimation du temps

Frontal-striatal circuits provide an important neurobiological substrate for timing and time perception as well as for working memory. In this review, we outline recent theoretical and empirical work to suggest that interval timing and working memory rely not only on the same anatomic structures, but also on the same neural representation of a specific stimulus. In the striatal beat-frequency model, cortical neurons fire in an oscillatory fashion to form representations of stimuli, and striatal medium spiny neurons detect those patterns of cortical firing that occur co-incident to important temporal events. Information about stimulus identity can be extracted from the specific cortical networks that are involved in the representation, and information about duration can be extracted from the relative phase of neural firing. The properties derived from these neurobiological models fit well with the psychophysics of timing and time perception as well as with information-processing models that emphasize the importance of temporal coding in a variety of working-memory phenomena.     

Les effets de l’ingestion aiguë d’alcool sur le jugement d’expressions faciales émotionnelles spontanées et dynamiques

This study is interested in the link between acute alcohol consumption and the perception of dynamic and spontaneous emotional facial expressions (EFE). The noxious effects of alcohol on EFE recognition are now well demonstrated (Attwood et al., 2009a). Studies showed that alcohol drinking impairs the judgment of facial expressions, especially of negative ones (EFE of anger and disgust notably). However, such effects have been observed for the judgment of artificial material (static/posed/morphed/EFE). Yet, everyday EFE are far from the archetypes used in the lab. Therefore, the present study aims at completing previous observations, this time for the identification of dynamic and spontaneous EFE. Dynamic and spontaneous EFE of amusement, interest, irritation, anxiety, and neutral were judged by 63 normal male drinkers. Buck et al.’s (1972) paradigm was adopted since it is recommended for the study of nonverbal behavior in the process of communication ( [Buck, 1990] , [Wagner, 1990] , [Wagner et al., 1986] and [Zuckerman et al., 1976] ). The emotion to be identified is the one self-reported by the EFE sender. On the pretext of tasting drinks, participants were randomly assigned to one out of six experimental conditions. Two conditions are concerned with the nature of the drink (alcohol or non-alcohol drink). Three other conditions relate to the participant's experimentally manipulated belief regarding the nature of the drink (non-alcohol drink, slight alcohol drink, hard alcohol drink). Results confirm the emotion identification impairment due to alcohol usually noted, thus showing that the effects of alcohol are also observed for the perception of spontaneous and natural facial expressions. Indeed, the comparison of participants who drank alcoholic drinks versus those who did not drink alcohol shows that the formers identify less well emotions than the latter. Moreover, results show that beliefs do not play a role in this deficit since participants’ identification errors are not linked to the belief they hold regarding the nature of the drink (with/without alcohol). Finally, the confusion matrix analysis brings to light the existence of recurrent confusions amongst alcoholized participants, confusions that do not appear amongst sober participants. Thus, results show that, to the exception of EFE of amusement, participants who drank alcohol recurrently assess stimuli as displaying anxiety. To conclude, it comes out that acute alcohol drinking alters the capacity to accurately identify spontaneous emotions expressed by faces, which capacity is essential to the smooth unfolding of human interactions.     

Rythmicités de l’attention des enfants et synchronisation,perspective socioécologique

This study investigates the impact of socioecological synchronization on the level and variations in children's attention at school. The aim was to re-examine previous results and broaden the chronopsychological scope of the research to include new synchronizers originating from proximal ecological niches. Two time-management factors were considered, the organization of the school timetable and the regular and predictable daily time with parents, influenced by work organization and compromises within the family. Two studies were conducted on a total of 498 children between six and 11 years of age. Results confirm a daily attention pattern. The level of performance and the daily pattern are affected by the two time-management factors whose beneficial or adverse influence depends on the child's age. Thus, while the weekly school timetable organized over four days has the strongest negative impact on attention performance for the two age groups, desynchronization due to a longer week-end is greater in the older children. The effects of the two possible four-and-a-half-day timetables also differ according to age. The benefits of working on Wednesdays for younger children appeared less beneficial for the older pupils. Regular and predictable daily time with parents does appear to play a role which also varies according to age, as it has an effect on younger children but has no impact on older children's attention or performance. This study confirms the synchronizing role of temporal messages from school and parental niches in the level and variations in children's attention at school, and is in line with the ecological point of view demonstrated by chronobiological studies. These findings support the importance of research that takes an overall approach to the child's environment. Further work should investigate the prioritization of social synchronizers according to their proximity to the child and how they interact.     

Attention capture by faces

We report three experiments that investigate whether faces are capable of capturing attention when in competition with other non-face objects. In Experiment 1a participants took longer to decide that an array of objects contained a butterfly target when a face appeared as one of the distracting items than when the face did not appear in the array. This irrelevant face effect was eliminated when the items in the arrays were inverted in Experiment 1b ruling out an explanation based on some low-level image-based properties of the faces. Experiment 2 replicated and extended the results of Experiment 1a. Irrelevant faces once again interfered with search for butterflies but, when the roles of faces and butterflies were reversed, irrelevant butterflies no longer interfered with search for faces. This suggests that the irrelevant face effect is unlikely to have been caused by the relative novelty of the faces or arises because butterflies and faces were the only animate items in the arrays. We conclude that these experiments offer evidence of a stimulus-driven capture of attention by faces.     

L’influence médiatique sur les jugements judiciaires : rôle du style d’écriture dans la formation des jugements

This article has two main goals: first, to review past research concerning the influence of pretrial publicity on judiciary judgements, and second, to present new empirical data concerning the impact of writing style in the media influence phenomenon. The three studies presented in this article show: 1/ that the morphosyntactical style of press articles can be distinguished as a function of the domain to which they pertain (judiciary, economic, politics, sports), 2/ that readers can readily recognize and identify the judiciary morphosyntactical style, and 3/ that the conformity of an article vs. its non-conformity to the judiciary style has some independent effect on memory about the article's content and on the elaboration of judiciary judgements by readers.     

La révision du texte : une activité de contrôle et de réflexion

Recent proposals in the field of text revision reveal significant changes in perspective concerning cognitive processes involved in writing. Whereas revision has been considered for a long time as being aimed at enhancing writing, this activity is now seen as a control of the different writing processes. Thus, planning is now added to this control process. Our review shows how results of novel studies strengthen this conception and in which way further researches should be pursued. In particular, we focus on three issues: training of control performed by expert writers, the cognitive cost of the required cognitive treatments and the conditions which permit to increase this control among writers during learning.     

Le développement de la mémoire de travail : perspectives dans le cadre du modèle de partage temporel des ressources

Working memory has a central role in cognitive development and its capacity is among the best predictors of high-level cognition and school achievement. Within the Time-Based Resource Sharing (TBRS) model, three main factors account for the development of working memory capacity. In this paper, we will review the main empirical evidence sustaining the impact of two of these factors on cognitive development. First, the amount of attention available for cognitive functioning might increase during childhood. Thus, for the same activities, older children would be able to process information faster than younger children. Within working memory span tasks, because the level of activation of memory traces decreases during the processing steps, any reduction of the duration of these steps directly diminishes the time during which the traces decay, and consequently increases the time available for reactivation or refreshing before the next processing step. These two effects jointly induce a stronger activation of the memory traces and a better recall of the to-be-maintained items. Second, because the main hypothesis of the TBRS model is that attention switches to refresh memory traces from processing to maintenance during the processing episodes, the efficiency of the refreshing mechanism should have a direct and strong impact on working memory functioning. An increase in the efficiency of this refreshing during childhood means that older children should take a greater advantage from the short pauses left free between each processing step. The level of activation of the memory traces would be then higher for older than for younger children, resulting in the classically observed increase in span. As a consequence, age-related changes in the efficiency of the refreshing could play a central role in working memory development.     

Attention Processes in Children with Movement Difficulties, Reading Difficulties or Both

Reading difficulties (RD) and movement difficulties (MD) co-occur more often in clinical populations than expected for independent disorders. In this study, we investigated the pattern of association between attentional processes, RD and MD in a population of 9 year old school children. Children were screened to identify index groups with RD, MD or both, plus a control group. These groups were then tested on a battery of cognitive attention assessments (TEA-Ch). Results confirmed that the occurrence of RD and MD was greater than would be predicted for independent disorders. Additionally, children with MD, whether or not combined with RD, had poor performance on all attention measures when compared with typically developing children. Children with RD only, were no poorer on measures of attention than typical children. The results are discussed with respect to approaches proposed to account for the co-occurrence of disorders.     

Défis et contraintes des recherches sur les familles recomposées : l'exemple de la relation belle-mère-belle-fille

Research accomplished in this field indicates clearly that of all the members of the stepfamily, it is the stepmother that encounters the most difficulties in adapting to the stepfamily situation. Furthermore, the same research also shows that the stepmother/stepdaughter relationship appears to be the most challenging of all dyads. This analysis also enables us to identify the results that appear most significant and to propose different hypotheses for future research.     

Object Perception,Attention, and Memory 2005 Conference Report

Currently one in five adults is still unable to read despite a rapidly developing world. Here we show that (il)literacy has important consequences for the cognitive ability of selecting relevant information from a visual display of nonlinguistic material. In two experiments we compared low to high literacy observers on both an easy and a more difficult visual search task involving different types of chicken. Low literates were consistently slower (as indicated by overall response times) in both experiments. More detailed analyses, including eye movement measures, suggest that the slowing is partly due to display wide (i.e., parallel) sensory processing but mainly due to postselection processes, as low literates needed more time between fixating the target and generating a manual response. Furthermore, high and low literacy groups differed in the way search performance was distributed across the visual field. High literates performed relatively better when the target was presented in central regions, especially on the right. At the same time, high literacy was also associated with a more general bias towards the top and the left, especially in the more difficult search. We conclude that learning to read results in an extension of the functional visual field from the fovea to parafoveal areas, combined with some asymmetry in scan pattern influenced by the reading direction, both of which also influence other (e.g., nonlinguistic) tasks such as visual search.     

Attention capacity and task difficulty in visual search

When a visual search task is very difficult (as when a small feature difference defines the target), even detection of a unique element may be substantially slowed by increases in display set size. This has been attributed to the influence of attentional capacity limits. We examined the influence of attentional capacity limits on three kinds of search task: difficult feature search (with a subtle featural difference), difficult conjunction search, and spatial-configuration search. In all 3 tasks, each trial contained sixteen items, divided into two eight-item sets. The two sets were presented either successively or simultaneously. Comparison of accuracy in successive versus simultaneous presentations revealed that attentional capacity limitations are present only in the case of spatial-configuration search. While the other two types of task were inefficient (as reflected in steep search slopes), no capacity limitations were evident. We conclude that the difficulty of a visual search task affects search efficiency but does not necessarily introduce attentional capacity limits.     

Attention and seeing objects: The identity-crowding debate

Can unattended objects by seen? Ned Block has claimed they can on the basis of “identity-crowding.” This paper summarizes the ensuing debate with particular emphasis on the role of unconscious perception. Although unconscious perception plays an important role, it cannot support conscious object-seeing in identity-crowding. Nevertheless, unconscious perception assists in making successful judgments about unseen objects. Further, compelling conceptual evidence against seeing unattended objects places the burden of proof on Block. I argue that countability is necessary for seeing objects and sufficient for attention to them; thus, no unattended objects are seen.     

Attention,mindwandering, and mood

We tested the hypothesis that mindwandering and external distraction are both manifestations of a common state of reduced attention focus, and examined how both relate to reported level of happiness. We conducted real-time sampling of people’s experience of mindwandering, irrelevant distraction (e.g. by music, phone, etc.), and happiness levels, in two studies with 524 people undertaking common daily-life activities. All irrelevant external distractions were positively correlated with mindwandering. Indeed mindwandering duration could be predicted from the reported duration of external distraction, when controlling for a range of background variables. An exploratory factor analysis of mindwandering and distraction reports suggested a single underlying construct. In addition, duration of irrelevant distraction by both mobile phones and mindwandering was significantly associated with reduced reported levels of happiness. The results are consistent with the hypothesis that that a state of reduced attention focus underlies both mindwandering and distractibility and clarify the link with happiness.     

Attention in the predictive mind

It has recently become popular to suggest that cognition can be explained as a process of Bayesian prediction error minimization. Some advocates of this view propose that attention should be understood as the optimization of expected precisions in the prediction-error signal (Clark, 2013, 2016; Feldman & Friston, 2010; Hohwy, 2012, 2013). This proposal successfully accounts for several attention-related phenomena. We claim that it cannot account for all of them, since there are certain forms of voluntary attention that it cannot accommodate. We therefore suggest that, although the theory of Bayesian prediction error minimization introduces some powerful tools for the explanation of mental phenomena, its advocates have been wrong to claim that Bayesian prediction error minimization is ‘all the brain ever does’.     

Attention training and the threat bias: an ERP study

Anxiety is characterized by exaggerated attention to threat. Several studies suggest that this threat bias plays a causal role in the development and maintenance of anxiety disorders. Furthermore, although the threat bias can be reduced in anxious individuals and induced in non-anxious individual, the attentional mechanisms underlying these changes remain unclear. To address this issue, 49 non-anxious adults were randomly assigned to either attentional training toward or training away from threat using a modified version of the dot probe task. Behavioral measures of attentional biases were also generated pre- and post-training using the dot probe task. Event-related potentials (ERPs) were generated to threat and non-threat face pairs and probes during pre- and post-training assessments. Effects of training on behavioral measures of the threat bias were significant, but only for those participants showing pre-training biases. Attention training also influenced early spatial attention, as measured by post-training P1 amplitudes to cues. Results illustrate the importance of taking pre-training attention biases in non-anxious individuals into account when evaluating the effects of attention training and tracking physiological changes in attention following training.