Le cycle journée/nuit : étude du développement des connaissances chez l’enfant français et comparaison de méthodes

The aim of this work is to study the knowledge development process about night and day cycle during ontogeny, by comparing two diverging theoretical and methodological approaches, on 178 elementary school children (6-7 years old, 8-9 years old and 10-11 years old). We hypothesis that the dimension (2D/3D) of the representation, the question type (open versus forced choice) and the age of the student have an effect on the amount of correct answers and on the coherence between the answers. The results show that the knowledge acquisition process regarding night and day cycle follows a gradual path during ontogeny and that the method used has a significant effect on the number of correct answers given by the children. Indeed, heliocentric model is given minority when children are asked with open questions (only 31% of the children). On the contrary 76% of them choose the heliocentric perspective when asked with forced-choice questions. The support's dimension (2D/3D) has no effect.     

Visual discrimination of species in dogs (Canis familiaris)

In most social interactions, an animal has to determine whether the other animal belongs to its own species. This perception may be visual and may involve several cognitive processes such as discrimination and categorization. Perceptual categorization is likely to be involved in species characterized by a great phenotypic diversity. As a consequence of intensive artificial selection, domestic dogs, Canis familiaris, present the largest phenotypic diversity among domestic mammals. The goal of our study was to determine whether dogs can discriminate any type of dog from other species and can group all dogs whatever their phenotypes within the same category. Nine pet dogs were successfully trained through instrumental conditioning using a clicker and food rewards to choose a rewarded image, S+, out of two images displayed on computer screens. The generalization step consisted in the presentation of a large sample of paired images of heads of dogs from different breeds and cross-breeds with those of other mammal species, included humans. A reversal phase followed the generalization step. Each of the nine subjects was able to group all the images of dogs within the same category. Thus, the dogs have the capacity of species discrimination despite their great phenotypic variability, based only on visual images of heads.     

Psychological Contracts and Their Implications for Job Outcomes: A Social Exchange View

This article explores the relationship between on the 1 hand psychological contract fulfilment and affective commitment and on the other hand, normative commitment and job satisfaction. We hypothesized that the perceived supervisor support (PSS) and the perceived organizational support (POS) mediate the relationship between the fulfilment of the psychological contract, commitment and job satisfaction. The sample consists in 337 soldiers in training. In order to test our model, we used 3 measures of psychological contract fulfilment (economic, socioemotional and developmental), PSS and POS measures as well as attitudes. Results show that the developmental psychological contract is related to affective and normative organizational commitment and job satisfaction whereas socioemotional fulfilment is unrelated to affective commitment. Psychological contract fulfilment has a greater impact on normative commitment than affective commitment. Results show also that only PSS plays a mediating role in psychological contract processes. Several implications emerge from this study. First, in a military context, it is important to strengthen the developmental psychological contract. Second, it is essential for organizations to place greater emphasis on encouraging supervisors to establish healthy working relationships with newcomers.     

Being Successful in a Creative Profession: The Role of Innovative Cognitive Style, Self-Regulation, and Self-Efficacy

Purpose  

The purpose of this study was to test a model that proposes that innovative cognitive style and self-regulation (setting priorities, planning work activities, and monitoring time and task progress) are related to the self-reported success of architects. We investigated two aspects of the success: as designers and as business people. To this end, we examined the mediating role of self-efficacy in these relationships.