Éude des processus d'activation et d'inhibition lexico-émotionnels chez des adultes jeunes, des adultes âgés, vers une application à la maladie de Parkinson

Abstract : The aim of this research is to study lexico-emotional processes of activation and inhibition in aging. Studies suggest that normal aging is characterized by lexical activation and inhibition impairment. Nonetheless, recent findings showed that emotional regulation tend to enhance with aging in order to maintain subjective well-being effective. This subjective well-being could enhance sensitivity in older adults toward positive stimuli whereas negative ones could be disengaged. We investigate lexico-emotional activation and inhibition processing with high predictable sentence context in a sentence completion task (Experiment 1, 2a) and in word recognition (Experiment 3a). As a whole, results indicate in older adults both activation and inhibition impairment, and also better performances toward positive stimuli whereas negative ones seem to be disengaged compared to younger ones. Furthermore, we hypothesized an automatic attention allocation (Experiment 4, 5a) and a voluntary attention allocation (Experiment 6) toward positive stimuli than negative. Results obtained reported an attentional bias toward positive stimuli in aging. Generally, it seems that our results are in line with literature concerning both-damage of lexical activation and inhibition processes, and also in the enhancement of positive stimuli treatment in aging. Understanding of lexico-emotional processing in normal aging could be extended to pathology like Parkinson’s disease (Experiments 2b, 3b and 5b) in order to understand affective system role’s in pathological aging.
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Marcellin Dupart. Éude des processus d'activation et d'inhibition lexico-émotionnels chez des adultes jeunes, des adultes âgés, vers une application à la maladie de Parkinson. Psychologie. Université de Bordeaux, 2016. Français. ⟨NNT : 2016BORD0244⟩. ⟨tel-01946370⟩

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