The PANAS is a 20-item scale in which 10 items describe positive mood (enthusiastic, interested, determined, excited, inspired, alert, active, strong, proud, attentive) and 10 items describe negative mood (scared, afraid, upset, distressed, jittery, nervous, ashamed, guilty, irritable, hostile). Each item is rated on a 5-point scale (not at all, a little, moderately, quite a bit, extremely). The PANAS shows high internal consistency and test-retest reliability. Subjects can leave the study at any point. If a participant experiences worsening of psychotic symptoms (relative to the baseline BPRS, an increase of 3 points or more OR an increase from a 5 to 7 on any one of the following BPRS items: somatic concern, conceptual disorganization, hostility, suspiciousness, hallucinatory behavior, or unusual thought content OR an increase of 2 or more on the CGI global severity OR the subject is judged to be entering an exacerbation of his/her illness by the treating clinician), the patient will be discontinued from the study. Other reasons for study termination include evidence of suicidal thinking or behavior, or the development of or worsening of significant depressive symptoms (score at any point in the study of >10 on the CDS or a 3 on the suicidal item), complete cessation of eating and drinking for > 24 hours, pregnancy, or blood pressure > 165/95 on three consecutive readings. Once a participant is discontinued from the study for whatever reason, completion ratings will be performed. This includes laboratory tests rating scales and neurocognitive assessments.