Multiple short‐term storage: A task to evaluate the coordination function of the central executive

The present paper explores one of the multiple aspects of working memory, specifically the coordinating function of the central executive with a complex double‐stimuli task. Performance on this task requires coordinating the short‐term maintenance of verbal as well as visuospatial information in preparation for recall. The task involves the single recall of words, the single recall of locations, or the recall of localized words. The study of the double‐stimuli task involves three classical interference tasks (articulatory suppression, Moar box tracking, and standing balance position) and comparing with simple span tasks (word recall and location recall). Word and location recall in this double‐stimuli task involves observing the classical interference effects: articulatory suppression impairs word recall performance without affecting location recall, whereas in visuospatial interference tasks the reverse is true. A second analysis showed that when performance on the double‐stimuli task (implying the simultaneous maintenance of verbal and visuospatial material at the same time) is compared with performances on short‐term memory tasks (classical word span or location span using the same material), a significant decrease in performance is observed. In a third analysis a score specific to the complex task was computed (corrected score). This score takes into account the recall capacity for both words and locations. This score, directly related to the capacities of coordination implied in the task, is sensitive to most attentional requirements of interference tasks. Contrary to what can be observed on location recall, the standing balance position did not significantly decrease performance. These results are consistent with an interpretation of the working memory according to which coordination of the subsystems is a function of the central executive.     

Working memory and mental arithmetic: A case for dual central executive resources

The current study was designed to examine the possible existence of two limited-capacity pools of central executive resources: one each for verbal and visuospatial processing. Ninety-one college students (M age = 19.0, SD = 2.2) were administered a verbal working memory task that involved updating numbers in 2-, 3-, and 4-load conditions. The task was administered in both single task (no-interference condition) and dual-task (verbal interference and visuospatial interference conditions) formats. Findings indicated main effects for both memory load and type of interference, as well as, a load × interference interaction. Verbal interference led to a steeper increase in errors on the primary verbal working memory task; whereas, there was a smaller increase in errors across load in both the non-verbal and no-interference conditions. The effect of verbal interference and the lack of a spatial interference effect on a primary task that utilized verbal working memory resources, suggests that the processing of verbal and spatial stimuli in a dual-task paradigm requires separate central executive resources.     

Effets de l’expression écrite d’un événement positif et négatif sur le niveau d’anxiété d’étudiants de différentes disciplines

This study concerns the field of writing and its influence on the emotional state of writers (Pennebaker, 2002). In this field of research, participants are usually requested to express their feelings and emotions following the occurrence of negative events. It is thus important to collect data concerning the influence of positive experiences. By contrast, our study aimed at exploring the impact of expressive writing in two opposite contexts. One context concerns a negative experience (exam's failure) and the other context refers to a positive experience (exam's success). Expressive writing is usually studied in relation to mental (mostly depression) and physical health of the participants. The impact of expressive writing affect on the writers’ anxiety has more rarely been investigated. This is the reason why we have examined the effect of writing on the levels of anxiety of writers. Writing expertise has also been shown to depend on academic disciplines. To fulfill these different goals, undergraduate students (n = 119) belonging to three different university discipliones (arts, sciences and psychology students) responded to the S-Anxiety scale and when then required to write about their feeling concerning the positive or negative topics. The level of anxiety was again measured afterwards. The main question under investigation is to know if emotion regulation (in the sense of Lepore et al., 2002) would vary as a function of the nature of the described event. We hypothesize that variations in anxiety would depend on these events and that impact of emotional regulation would also differ according to the students’ curses. The results show that sciences students are not as verbose (measures in terms of verbal volume) than arts and psychology students. Moreover, emotional content of writing has been analyzed with Emotaix-Tropes (Piolat and Bannour, 2009a). Whatever the course, students produced both positive and negative lexicon for the two topics. However, positive lexicon was proportionally more important in the Success and an inverse result was observed in the Failure situation. The anxiety level was higher following the use of negative valence lexicon and was lower following the use of lexicon of positive valence. The short term beneficial effect of disclosure is thus not observed in case of a negative event. In addition, students with a scientific curse showed more variations in their emotional state.     

Évaluation de l'efficacité d'un entraînement mnésique chez des personnes très âgées dépressives institutionnalisées

The focus of this work is to study the influence of “memory's training” on a group of 27 depressed elderly residents (age's mean = 84.77; GDS's mean = 17.7) and 28 non-depressed elderly residents (age's mean = 84.96; GDS's mean = 3.5) with self-reported memory loss. The training's task was a free recall using mmemonic method of Loci with each person. Results showed that depressed residents increase their performances during the training's sessions like non-depressed residents but not to the post-test. Consequently, the memory complaint is an indicator to propose to elderly person memory's training if the prevalence of depression is establish, so it is to be hoped that further or additional interventions be proposed.     

Psychopathologie de la vie quotidienne : validation d’un nouveau questionnaire de défaillances cognitives

In our daily lives, we make a number of errors and blunders for all our activities. These are the cognitive failures of everyday life, which are conventionally measured by the Cognitive Failure Questionnaire (CFQ). Literature has demonstrated not only that this tool has many limitations especially regarding its factor structure which is not identified by consensus but also that the origin and nature of cognitive failures are not interviewed because they are considered in terms of executive dysfunction. Also, this study will be to describe the various stages of validation structure of a new assessment tool, the Cognitive Failures Questionnaire Daily (questionnaire de défaillances cognitives quotidiennes [QDCQ]) and expose the different levels of analysis of our methodological approach that we have allowed to get it. Therefore, it was administered to 237 all comers people of all ages and proposed them to assess the frequency of cognitive failures over the last 6 months. As a result of is a first step in item analysis using indices of normality, of difficulty and discrimination and a second at different scales, we removed twenty-five items out of fifty-two which the statistical power was not sufficient to be kept. We then obtained a new version of QDCQ, which comprises twenty-seven items that apprehend the most cognitive failure's construct. The results of several confirmatory factor analyzes identify a structure with three factors (attention, language and memory) as best fitting our data. That is consistent with the general literature on this construct (0145 and 0240), and it tends us to prefer the hypothesis that the occurrence of cognitive failures would be the result of a momentary disruption of specific cognitive processes (probably executive processes which it remains to be defined) that influenced in different spheres of activities. The questionnaire opens new perspectives both in terms of clinical practice, particularly in that it could participate in early detection of several behaviours involved in various forms of pathological cognitive aging such as Alzheimer's disease or Parkinson's. Moreover, conceptually, it could also lead to clarify the relationship that the construct of cognitive failures has with executive functions.     

Profil motivationnel et performance sportive

The purpose of this study was to analyze the relationship between motivation and performance in the sport domain based on self-determination theory (Deci, E.L., Ryan, R.M., 1985a. Intrinsic motivation and self-determination in human behavior. Plenum, New York). Cluster analysis revealed the presence of three motivational profiles in a sample of French national tennis players (N = 127). Then, an analysis of variance revealed that sport performance differed across these three clusters. More specifically, results showed that a motivational profile characterized by moderate to high levels of autonomous and controlled motivations both at contextual and situational levels was conducive to the worst performances. Implications for future research as well as for athletes and their coaches are discussed.     

Conséquences et corrélats associés au soutien de l’autonomie dans divers domaines de vie

Self-determination theory (0160 and 0170) suggests that autonomy-supportive environments, where one's perspective is considered, feelings are recognized, meaningful informations are given, and opportunities for choice are provided, promote optimal functioning. Many studies show that autonomy support leads to positive affective, cognitive, and behavioral consequences. However, this body of research is little known because studies are scattered throughout various research fields and no review of the overall positive impact of autonomy support in various life domains is available. This literature review presents studies on this interpersonal style in five life domains.     

Working memory and individual differences in mathematics achievement: A longitudinal study from first grade to second grade

This longitudinal study examined the relationship between working memory and individual differences in mathematics. Working memory measures, comprising the phonological loop, the visuospatial sketchpad, and the central executive, were administered at the start of first grade. Mathematics achievement was assessed 4 months later (at the middle of first grade) and 1 year later (at the start of second grade). Working memory was significantly related to mathematics achievement in both grades, showing that working memory clearly predicts later mathematics achievement. The central executive was a unique predictor of both first- and second-grade mathematics achievement. There were age-related differences with regard to the contribution of the slave systems to mathematics performance; the visuospatial sketchpad was a unique predictor of first-grade, but not second-grade, mathematics achievement, whereas the phonological loop emerged as a unique predictor of second-grade, but not first-grade, mathematics achievement.     

Verbal and visuospatial recall by younger and older subjects: use of matched tasks

In this study, 18 older (over age 65, M = 75.61 years) and 18 younger (below age 40 and over age 17, M = 26.44 years) healthy volunteers were tested on verbal and visuospatial recall. Tasks were matched on discriminating power. Older Ss performed worse than younger Ss on both tasks. The older Ss also showed a larger deficit in visuospatial than in verbal recall, relative to the younger Ss. These results are consistent with the theory of aging according to which verbal tasks are more resistant to deterioration than are nonverbal tasks. A psychological explanation based on lifetime experience with verbal material is preferred over the physiological explanation advocating faster aging of the right hemisphere.     

Directives anticipées et autonomie de la personne en fin de vie

Advance directives are an instrument used to maintain patients autonomy in case they can no longer decide themselves, according to French law « patients rights and end of life ». However, analysis of the legal procedure does not lead to such a conclusion.     

Rôle des propriétés inertielles segmentaires sur la perception de l’étendue de l’espace péripersonnel

Previous studies have suggested that the perception of peripersonal space can hardly be achieved using only scene-based visual cues and requires combining visual information with motor representations. Motor representation can be viewed as a component of a predictive system, which includes a neural process that simulates through motor imagery the dynamic behaviour of the body in relation to the environment. In this study, we analysed whether modifying the force required to reach a visual target influences the perception of what is reachable. In a visuomotor task, the experimental group (n = 10) adapted to a 1.5 kg weight attached to the right wrist while performing a series of pointing movements. The control group (n = 10) performed the motor task without inertial perturbation. A perceptual judgement task of what is reachable was performed before and after the motor task. Results showed that inertial perturbation produced initially an undershoot of the target suggesting a lack of motor force to overcome the inertial perturbation, but spatial errors receded progressively through movement rehearsal. Perceptual estimates of what is reachable slightly overestimated action capacities but were not affected by motor adaptation. Thus, modifying motor force required to compensate for inertial perturbation had no direct effect on the perception of peripersonal space. When interpreted in regard to previous experimental work, this result suggests that motor representations may provide information about the sensory or spatial consequences of action rather than the sense of effort associated with motor production.     

Produire et réviser la morphologie flexionnelle du nombre : de l'accès à une expertise

To understand how children and adults produce written text, you must first be able to describe how they acquire some basic mechanisms. This is the reason to study the acquisition and use of simple orthographic principles. Following this idea, the research of Largy, Fayol et al. concerns nominal and verbal agreement in French. This article proposes a synthesis of the recent development in this domain. Through the study of two competences to be acquired by the writer — (1) to produce the flexional morphology of number in written text and (2) to revise and judge the correctness of this production — this article presents and discusses in which way the learner access to a writing expertise, always relative.     

L'activité conversationnelle d'un jury de validation d'acquis : analyse interlocutoire de la formation d'un concept potentiel

In this contribution, authors try to give an interlocutory analysis of a particular verbal and work situation: a face to face activity of acquired knowledge validation panel. The analysis is made in order to verify the hypothesis that conversational activity, that realises an evaluative activity, is both the place and the instrument of the construction of a potential concept. Vygotski (1934/1997) calls “potential concept” the meeting between a concrete meaning, developed in action, with a “scientific concept”.     

Prospective and retrospective time perception are related to mental time travel: Evidence from Alzheimer’s disease

Unlike prospective time perception paradigms, in which participants are aware that they have to estimate forthcoming time, little is known about retrospective time perception in normal aging and Alzheimer’s disease (AD). Our paper addresses this shortcoming by comparing prospective and retrospective time estimation in younger adults, older adults, and AD patients. In four prospective tasks (lasting 30 s, 60 s, 90 s, or 120 s) participants were asked to read a series of numbers and to provide a verbal estimation of the reading time. In four other retrospective tasks, they were not informed about time judgment until they were asked to provide a verbal estimation of four elapsed time intervals (lasting 30 s, 60 s, 90 s, or 120 s). AD participants gave shorter verbal time estimations than older adults and younger participants did, suggesting that time is perceived to pass quickly in these patients. For all participants, the duration of the retrospective tasks was underestimated as compared to the prospective tasks and both estimations were shorter than the real time interval. Prospective time estimation was further correlated with mental time travel, as measured with the Remember/Know paradigm. Mental time travel was even higher correlated with retrospective time estimation. Our findings shed light on the relationship between time perception and the ability to mentally project oneself into time, two skills contributing to human memory functioning. Finally, time perception deficits, as observed in AD patients, can be interpreted in terms of dramatic changes occurring in frontal lobes and hippocampus.     

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.     

Estimating the executive demands of a one-back choice reaction time task by means of the selective interference paradigm

The present study proposes a new executive task, the one-back choice reaction time (RT) task, and implements the selective interference paradigm to estimate the executive demands of the processing components involved in this task. Based on the similarities between a one-back choice RT task and the n-back updating task, it was hypothesized that one-back delaying of a choice reaction involves executive control. In three experiments, framed within Baddeley's (1986) working-memory model, a one-back choice RT task, a choice RT task, articulatory suppression, and matrix tapping were performed concurrently with primary tasks involving verbal, visuospatial, and executive processing. The results demonstrate that one-back delaying of a choice reaction interferes with tasks requiring executive control, while the potential interference at the level of the verbal or visuospatial working memory slave systems remains minimal.     

Chronic glucocorticoid hypersecretion in Cushing’s syndrome exacerbates cognitive aging

Cumulative exposure to glucocorticoid hormones (GC) over the lifespan has been associated with cognitive impairment and may contribute to physical and cognitive degeneration in aging. The objective of the present study was to examine whether the pattern of cognitive deficits in patients with Cushing’s syndrome (CS), a disorder characterized by chronic exposure to elevated levels of glucocorticoids (GC), is similar to that observed in older individuals. Ten subjects with CS were compared to sex-, age-, and education-matched healthy controls and older subjects (age of CS subjects + 15 yr). All participants were administered tests to assess attention, visuospatial processing, learning and memory, reasoning, concept formation and verbal fluency. MANCOVAs with depression scores as covariate and polynomial contrasts revealed that the age-matched control group performed better than the CS and older subject groups in visual target detection, trail making test, stroop task, digit symbol substitution, block design, object assembly, visual reproduction, spatial memory and similarities. The CS and older subjects performed similarly on these tasks. Further, a principal component analysis revealed two significant factors, representing general cognitive function and verbal memory explaining 39.9% and 10.0% of the variance, respectively. Additional MANCOVAs with depression as a covariate revealed that CS and older control subjects showed impaired performance on general cognitive function compared to age-matched controls. These results suggest that hypersecretion of GCs has “aging-like” effects on cognitive performance in individuals with CS.     

Sex Differences in Episodic Memory

ABSTRACT— Research shows sex differences in episodic memory. These differences vary in magnitude as a function of the type of material to be remembered. Throughout the life span, verbal episodic-memory tasks yield differences favoring women. In contrast, episodic-memory tasks requiring visuospatial processing result in differences favoring men. There are also sex differences favoring women on episodic-memory tasks requiring both verbal and visuospatial processing and on face-recognition tasks. Thus, there may be a small, general episodic-memory advantage for women—an advantage that can increase by the advantage women have over men in verbal production and can be reversed by the male advantage in visuospatial tasks. In addition, environmental factors affect the magnitude of the sex differences in episodic memory.     

Connaissance du nom et du son des lettres, habiletés métaphonémiques et capacités de décodage en grande section de maternelle

This study examined the specific implication of letter-name knowledge in reading acquisition on 5-year-old kindergarten children. Several studies underlined the importance of both phonological and orthographic skills (letters and grapho-phonological associations’ knowledge developed during reading acquisition). So, we focused on the link between those different early abilities and on their links with reading acquisition during school year. Thus, at the beginning and at the end of the year, we proposed to 40 children metaphonemic tasks (phoneme identification in initial and final position in the words), letter-sound and letter-name knowledge tasks (naming and identification) and a pseudo-words decoding task. In addition, to access letter-name knowledge, two types of measurements were proposed: an accuracy measure and a speed one. Mean number of correct responses and reaction times were collected by children and analysed too. Results show that letter-name knowledge could play a part in metaphonemic abilities development and in letter-sound associations’ discovery and acquisition, at the beginning of the year. Thanks to those skills improvement, letter-name knowledge could have an indirect impact on later children's decoding skills. Furthermore, the direct link, already observed at the beginning of the year, between letter-name knowledge and decoding skills still exists in April. At last, analyses on letter-name knowledge access time show that the more children name an important number of letters, the more they do it quickly. These results could mean that a certain level of letter-name knowledge have to be reach before children could use this knowledge automatically. All together, results confirm the importance of good letter-name knowledge in the first stages of reading acquisition. We also suggest taking into account some clues of letter-name knowledge's automatic use to better understand reading acquisition processes.     

Does relocating information in text depend on verbal or visuospatial abilities? An individual-differences analysis

In this individual-differences study, we evaluated the prevalent view that relocating information in a previously read text depends primarily on visuospatial abilities. Participants read a text, answered fillin-the-blank test questions, and identified which page and line in the original text contained the sentence in each question. They also completed a battery of verbal and visuospatial tasks. Performance on verbal tasks was highly predictive of the accuracy of both page and line identifications, and this correlation remained significant even after we controlled for performance on visuospatial tasks. In contrast, performance on visuospatial tasks was not predictive of either page or line identification accuracy, once verbal abilities were controlled for. These results suggest an important role for verbal abilities in relocation of text information and a lesser role for visuospatial abilities than has previously been assumed.