Effets de l’âge et de la capacité de mémoire de travail sur l’exécution d’instructions de complexité variable chez des adultes jeunes et âgés

Technical devices are part of elderly people's daily life. Meanwhile, research has not yet systematically explored how old people understand procedural instructions accompanying these devices. Thus, the aim of this study was to investigate how age and memory span affect how people follow procedural instructions. To do so, the Reading Span Test of Daneman & Carpenter (1980) and an adaptation of the Kaplan & White's (1980) following directions game were administrated to young and older adults. The Reading Span Test was administrated in order to determine the participants’ memory span size. Then, participants had to follow procedural instructions with a growing complexity displayed on a computer screen. Results show that participants’ age and instructions complexity affect how the instructions are performed. Old adults encounter more difficulty performing the task than young adults. Furthermore, whatever the age, as the complexity of instructions increases, low-span participants have more difficulty performing instructions than high-span participants do.     

Le Laboratoire de Psychologie de la Conduite de I'Organisme National de Séurité Routiēre, Montlhefy, France

Psychologie ergonomique appliquée aux situations de conduite
Psychopédagogie de la conduite et de la circulation
Psychosociologie de la communication sociale en matière de sécurité     

Le rôle de la mémoire de travail dans la production écrite de textes

Integration of capacity (Just and Carpenter, 1992) and componentiel (Baddeley, 1986) conceptions of working memory in models of text composition (Hayes, 1996 ; Kellogg, 1996 ; McCutchen, 1996) has allowed studying several facets of the role of working memory in writing acquisition and in expert management of the writing processes. This article presents these two conceptions and examines their respective contribution in the field of writing research from two perspectives: The demands of the writing processes (in terms of processing and transient storage) and the influence of working memory capacity on the control of production. The conclusion underlines the importance of investigating the on-line management of text production, the role of the visuo-spatial sketchpad, and to link strategies for allocating the working memory resources with text quality.     

L'illusion de l'identité perceptive de l'objet

Cette étude avait deux objectifs. L'un était de mesurer, à différents niveaux d'âges, l'illusion de l'identité de l'objet pour des paires de formes différentes, présentées en mouvement apparent. L'autre consistait à déterminer les effets de la démonstration de transformations sur l'identification des mêmes paires de formes lorsque présentées en mouvement apparent. Un total de 138 enfants (âges moyens: 5;6, 6;6 et 7;6 ans) a été soumis à deux séances. La première présentait cinq couples de formes différentes en mouvement apparent afin de produire, pour chacun de ces couples, l'illusion d'un seul objet changeant de forme. La seconde séance présentait les mêmes couples en mouvement apparent, sauf que chacun de ces couples était précédé, individuellement, d'un démonstration de leur transformation. L'analyse nonparamétrique des résultats montre que l'illusion de l'identité ne varie guère de manière significative avec l'âge, ou avec la démonstration des transformations. L'interprétation suggère que la représentation des transformations serait un facteur plus important dans le processus d'identification que la simple perception de ces modifications.     

Les marques de cohésion : leur rôle fonctionnel dans l'acquisition de la production écrite de texte

Written text composition is a complex activity improving slowly through acquisition. One of the main difficulty for the novice writer is to translate in the linear textual structure a multidimensional representation (Fayol, 1991). The general issue of this paper concerns the essential role of cohesion devices in the acquisition of this linearization process in writing. Anaphoræ, connectives and punctuation marks are first mentionned, stressing on their common functions in text. Then, stress is put on their acquisition, both as structured systems and as functional tools progressively organizing the written text and ensuring close inter-systems relations.     

L'avenir de l'approche par élaboration de règles

The goal of this study is the elaboration of a computerized diagnostic instrument based on Siegler's rule-assessment approach for assessing the acquisition of the probability quantification scheme in subjects aged 6–18 years. Three versions of the test were used. Version 1 was Siegler's original version (four types of problems and four rules). In version 2 five new rules were added; version 3 contained the five new rules plus eleven types of problems. Results show that version 1 allows the classification of only 50% of subjects; version 2, 60%; and version 3, 70%. Despite improved versions, some weaknesses remain, the most important one being that it is still impossible to evaluate intra-individual variability. Aware of these limits, Siegler has reassigned his model to a local model of problem solving, and suggests a developmental model of information processing inspired by a Darwinian model of variation and strategy selection. The authors hypothesize that computer engineering could not only reaffirm the general status of the rule-assessment approach, but could also allow consideration of intra-individual variability.     

Capacité de mémoire de travail et traitement du pronom chez l’enfant

The aim of this study was to explore the relationship between working memory capacity (WMC) and reading comprehension in children by testing the processing of pronouns. Two groups of nine- to ten-year-old children classified as high span and low span were administered a pronoun processing task. In this task, the computation of the antecedent referent for pronouns was varied by manipulating the distance between the pronoun and its antecedent and the availability of a gender cue. The results showed that compared to high-span children, low-span children experienced more difficulties in computing a pronoun's referent. High-span children spent longer reading sentences containing anaphoric pronouns when pronouns could not be resolved on the basis of the gender alone, suggesting that the pronouns were resolved as they were read. Low-span children tended to delay resolution until it was required by the task. In the question-answering times, low-span children were more adversely affected by distance than high-span children. Altogether these findings support the view that working memory capacity constrains resolution of anaphoric pronouns in children.     

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.     

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.