Computational Analysis of semantic fluency in psychosis

Diplôme Master Computational Analysis of semantic fluency in psychosis eng 2024 author Stocker Ueli 400723 author Dannecker Noemi author Steiner Anna author Lang Nils author Surbeck Werner author Ellendorff Tilia author Schneider Gerold director Debbané Martin 543333 Section de psychologie (PSICO) director Homan Philipp Psychosis is a complex psychiatric disorder characterised by disturbances in cognition and language. Natural language processing (NLP) promises to resolve the long-standing debate between Bleuler and Kraepelin as to whether semantic changes are at the core of psychosis or whether they are merely downstream consequences of an essentially cognitive disorder. This cross-sectional study examines semantic fluency in people with psychosis compared with healthy controls, with the aim of elucidating the role of cognitive impairment and formal thought disorder (FTD). Participants (32 patients with non-organic psychosis and 32 healthy controls) completed three semantic fluency tasks (animals, clothes, food) and were assessed for cognitive variables and negative symptoms. FTD was assessed using the Scale for the Assessment of Thought, Language and Communication (TLC) and semantic coherence was measured using the Covington Vector Semantics Tool (CoVec). Results showed that patients produced fewer words in the fluency tasks, with correlations suggesting associations with psychomotor speed, working memory and negative symptoms. Measures of semantic coherence differed between the two groups, with patients showing higher semantic coherence, particularly in the fluency task based on clothes. However, the relationship between FTD and semantic coherence was inconclusive due to the limited variance in FTD scores. Our study highlights the complexity of semantic processing deficits in psychosis and calls for further research in computational linguistics for the early detection of psychosis. Semantic fluency tasks Psychosis Schizophrenia Formal thought disorder Computational linguistics Semantic coherence Dewey 150 Maîtrise universitaire en psychologie 108 Section de psychologie 71 false e42e0e73-6efa-4f32-9103-1234f04e1aa3 Master thesis Restricted Stocker_Ueli_Mémoire_juin2024.pdf 724822 application/pdf 2c0b3130855676c3d79e3d996211cfe8f2f73b5a6e7622b85f538a2a62af6bce restrictedAccess Faculté de psychologie et des sciences de l'éducation / Section de psychologie

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Computational Analysis of semantic fluency in psychosis				2024	54	1

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