Trajectories of Treatment Response as Window Into the Heterogeneity of Psychosis: a Longitudinal Multimodal Imaging Study

Subjects with first episode psychosis will be treated with risperidone, the most frequently used antipsychotic drug (APD) for 32 weeks. The study will follow a rigorous longitudinal design to capture treatment response whereby those without an adequate response after 16 weeks of treatment will be switched to aripiprazole, another APD for 16 weeks. All patients will be scanned four times: at baseline and after 6, 16, and 32 weeks of treatment.