Schizotypie chez le jeune adulte : interactions avec les traits autistiques et nouveaux éléments dans la schizotypie positive

Abstract : Schizotypy is a personality trait characterized by subclinical levels of schizophrenia symptoms, including positive (odd beliefs and unusual perceptions) or negative (withdrawal and social anxiety) features. This thesis aimed at a better understanding of how schizotypy articulates with other psychopathological dimensions.As a first part, we studied the links between schizotypy and autistic traits in 2 samples of scientific college students, using a cluster analysis. A first analysis based on schizotypal and autistic dimensions identified 4 groups with distinct profiles, including a cluster with high levels of traits. This combination of traits was associated with significant psychopathological degradation (anxiety and depressive symptoms, insecure attachment) and with lesser academic performances. A second study identified a typology of students based on schizotypal, autistic and cyclothymic traits. This typology showed a high traits cluster with elevated levels of depressive symptoms and suicidal ideations, and lesser academic results. These 2 studies thus suggest that association of schizotypal and autistic traits could impair success in scientific background, in relationship with a depressive comorbidity.The second part identified a typology of young adults aiming at reassessing the concept of "healthy schizotypy", defined as a trait of positive schizotypy without other schizotypal dimensions. Our results confirm that positive schizotypy is associated with benefits (e.g., perceived quality of interpersonal relations) but also with traits of personality disorders and psychopathological symptoms, which questions the concept of healthy schizotypy. In a last study we identified biases illustrating the impression that positive schizotypy may seem healthier than in reality.
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Patrick Raynal. Schizotypie chez le jeune adulte : interactions avec les traits autistiques et nouveaux éléments dans la schizotypie positive. Psychologie. Université Toulouse le Mirail - Toulouse II, 2018. Français. ⟨NNT : 2018TOU20003⟩. ⟨tel-02180939⟩

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