Characterization of the Motivational Deficit in Schizophrenia and Depression

This research focuses on disorders of motivation, responsible for a disability that patients experience daily. It is a disorder that affects behavior, especially social. Mechanisms, which result in these disorders, are poorly understood. This ignorance is responsible for the lack of effective therapy. The investigators realize this work in order to better understand the motivational deficits. The objective of the study is to characterize the cognitive mechanisms of motivational deficits in schizophrenia and depression. To answer the question posed in the research, it is planned to include 35 people with schizophrenia, 35 people with depression and 70 heathy volunteers in the Hospital of Sainte-Anne .