L'humeur dépressive sous l'angle des cognitions spécifiques et des écarts entre les sois

Abstract : The aim of this study is to propose an integrated model of depressive mood, by including several cognitions and self-discrepancies. Several preliminary studies were conduct. On the one hand, two studies were devoted to the measure and test of a structural organisation between eight specific cognitions. In addition, we try to explain their relationship to depressive mood by the way of two distinct mechanisms: a salutary one via perceived control and a detrimental one via self-blame. Results corroborate our hypothesis by relegating causal attributions to the background and by showing that self-blame and perceived control have more proximity with depressive mood. On the other hand, one study presents the preliminary validation of our French adaptation of the Integrated Self-Discrepancy Index (ISDI; Hardin & Lakin, 2009). Then, through the use of structural equation modeling, the integrated model was tested. Self-esteem is proposed as mediator of the relationship between cognition, self-discrepancies and depression. While effects of cognition are confirmed, one hypothesis of self-discrepancy theory (Higgins, 1987) isn't. Additionally, post-hoc analyses were then performed. Finally, we addressed the direction of causality between personality and depression, by comparing five structural models including vulnerability hypothesis, scar hypothesis, or both. Results showed that a mixed model integrating both types fit best to the data.
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Julie Ledrich. L'humeur dépressive sous l'angle des cognitions spécifiques et des écarts entre les sois. Psychologie. Université Nancy 2, 2011. Français. ⟨NNT : 2011NAN21012⟩. ⟨tel-01749063⟩

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