Decision making in schizophrenia
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- Institutt for psykologi 
Schizophrenia patients are seen as inferior to healthy controls with regard to statistical inference. In this study I aim to investigate this further, using two novel tasks, the shape precision task measuring perceived and actual precision of visual short-term memory, and a modified version of the beads task measuring probability estimates and perception of change. Participants are also compared with regards to results from the Cognitive Biases Questionnaire (CBQ), Short Need For Closure Scale (SNFC) and a Theory of Mind survey (ToM). 20 patients on the schizophrenia spectrum and 19 healthy controls participated in this study. The results support the main hypothesis that schizophrenics are thought to perceive their predictions as more precise than they really are.