Effects of a timing signal on simple reaction time with a rectangular distribution of foreperiods

It was hypothesized that the time course of preparation during a variable interstimulus interval (ISI) of a simple reaction time (RT) experiment was partly determined by the subjective distribution of conditional probabilities of the executive signal (ES). Sixty subjects performed a simple auditory RT task with various ranges of six ISI durations organized in rectangular frequency distributions. In order to give the subjects information about elapsed time during ISI, a recurring time-marking click, the periodicity of which was varied, was introduced during the ISI in one of the three series of trials each subject performed. A strong decreasing RT--ISI relationship was observed supporting the main hypothesis. However, a clear increase of mean RT over all ISIs combined, was also found. Because these two mixed effects were greatest when the click intervened at the possible times of ES occurrence only, three functions of time-information given by the click are discussed: (a) a reduction of the usual increase of time estimation error with increased ISI; (b) an increase of the subjects knowledge of the ISI range resulting from the discontinuity of the time-marking click which makes easier a discrete time-intervals numbering process; (c) a change of the simple-RT task into a discrimination task.     

La question ontologique et laPhénoménologie de la perception

Sans résuméNous remercions le professeur Gary Brent Madison de l'Université McMaster ainsi que le professeur Théodore Geraets de l'Université d'Ottawa qui ont lu et commenté des versions antérieures de cet article. Nous voulons remercier en particulier la professeure Gisèle Chevalier du Département d'études franÇaises de l'Université de Moncton pour ses précieux conseils sur le fond et la forme du texte. Les erreurs et les omissions demeurent toutefois les nÔtres.     

Objet et methode de la science juridique

Sans résumé     

Contributions of psychopathic, narcissistic, Machiavellian, and sadistic personality traits to juvenile delinquency

The aim of this study was to assess the relative contributions of psychopathic, narcissistic, Machiavellian, and sadistic traits to delinquent behaviors in adolescents. Participants were 615 high-school students who completed self-report questionnaires. Psychopathic, narcissistic, Machiavellian, and sadistic traits were moderately correlated suggesting they may be overlapping but distinct constructs. Hierarchical multiple regression analyses were conducted to control for other socio-familial or psychopathological risk factors. Psychopathic and sadistic traits were independent predictors of delinquent behaviors in boys only. These findings suggest the importance of studying the role of sadistic traits in juvenile delinquency.     

Gender Differences in Parental Influences on Adolescent Body Dissatisfaction and Disordered Eating

This study explored gender differences in the relationship between parental influences and body dissatisfaction and disordered eating among offspring. Participants were 221 male and 380 (63%) female French high school students of mean age 16 (SD?=?.95) years old, from the Toulouse area, who completed a survey exploring parental influences, body dissatisfaction, drive for thinness and bulimic symptoms. Girls (compared to boys) perceived more maternal comments regarding both their own weight and shape, and the importance of physical appearance. Parental variables explained a larger amount of the variance in girls’ body dissatisfaction and disordered eating (compared to boys’). Findings support both a cumulative model and a gender-linked model of transmission of attitudes and behaviors related to shape and eating.     

Predictive influence of phonological processing, morphological/syntactic skill, and naming speed on spelling performance

This paper focuses on the predictive influence of phonological awareness, morphological/syntactic skill, and naming speed on spelling. The retrospective study correlated spelling performance in a group of 199 French-speaking children at the end of grade 2 with earlier capacities for phonemic manipulation, morphological/syntactic correction, and naming speed, assessed at the end of grade 1. The results are consistent with an integrative model that challenges the unitary phonological disorder hypothesis and confirmed that in French, as in other languages, naming speed is an independent predictor of reading performance.     

Factor analyses of the DIB-R in adolescents

The goal of this study was to examine the factor structure of the Revised Diagnostic Interview for Borderlines (DIB-R; Zanarini, Gunderson, Franckenburg, & Chauncey, 1989) in a nonpatient sample of 118 adolescents. A principal components factor analysis with a Varimax rotation extracted three factors. A confirmatory factor analysis showed that this three-factor model provided an adequate fit. The first factor, which included depression, anxiety, helplessness/hopelessness, loneliness/emptiness, and also encompassed odd thinking/unusual perceptive experiences and quasi-psychotic experiences, appeared to be centered on painful feelings and dissociative defense. The second factor, labeled "impulsivity," consisted of impulse action patterns, counterdependency, and stormy relationships. This factor seemed to be centered on defensive acting-out. The third factor, called "aggressiveness," consisted of anger, hypomania, devaluation/manipulation/sadism, and demand/entitlement, and might express manic/narcissistic defenses. These analyses suggest that there may be homogeneous components of borderline symptomatology in adolescents that may reflect affective disturbances and defensive mechanisms.