Fidélité inter juge d’une mesure du stress par échelle visuelle analogique

The use of a visual analogue scale (VAS) for the assessment of stress during occupational health examination could be an useful tool. However, psychometrics features of the VAS have to be assessed. The aim of this study is to test the inter judge reliability of the VAS in a psychological dimension assessment. Two occupational physician have used the VAS in a worker group. There is no significant difference in the distribution of VAS values. This result supports the hypothesis of a satisfactory inter judge reliability of the VAS in stress measurement.     

Traitement cognitif d’une représentation « mythique »

Previous studies have shown that participants provided more wild beliefs (i.e., beliefs that do not stem from institutionalized and programmed discourse) about an inexplicable event when they were exposed first to a condition of cognitive control and second when they were exposed to a fantastic (versus factual) presentation of this event. This question has been examined here for a salient social event considered as unpredictable just before it happens. This social event has been discussed a lot after its apparition, is now part of a shared social memory, and is considered as a “myth”: that is the 11 September 2001 attacks. This event has been studied in the same terms that in Deconchy's studies (2006). One hundred and twenty-six participants were assigned to a cognitive control condition (A₁) or a non cognitive control (A₂). Some participants had to explain this social event presented with a use of a pure iconography (Twins towers in black and white, clouds of smoke with clear demarcations: B₁) whereas others faced this event with a presentation linked to phantasmagoria (Twins towers in blue, green and yellow colours, clouds of bloated flames, flaky background: B2). Five different kinds of “explanations” (usually provided just after the 9/11) were offered for which participants had to rate the relevance: mysterious, technological, sociological, typical factors, internal causes attributed to the presumed actors (prestereotypical). Factorial scores on mysterious and internal explanations were high for the experimental condition A₁B₂ (cognitive control with phantasmagoria) and were significantly different from the other experimental conditions.     

Overcoming spontaneous patterns of coordination during the acquisition of a complex balancing task.

Learning in complex tasks is usually conceived as the problem of mastering the multiple and redundant degrees of freedom of the system. To reduce control requirements, two different strategies are conceivable. The first one consists of a "freezing-freeing" process for most articular joints to reduce the number of active biomechanical degrees of freedom to be managed. The second strategy consists of introducing rigid couplings between the oscillators building the system. In this case, learning implies the dissolution of initial couplings and the emergence of new, more task-specific couplings. The goal of our study was to analyze the spontaneous coordination of beginners and its development in a complex balancing task on a stabilometer, and to examine the emergence of these two strategies. Our results showed that beginners were characterized by strong couplings between the joints of the lower limbs. During learning, new and more task-specific couplings emerged that reflected a new organization of the trunk and a decoupling of some joints of the lower limbs that were initially coupled during the first few trials.