Both groups: All subjects will be free of current impairing affective disorders, separation anxiety disorder, social anxiety disorder, panic disorder, generalized anxiety disorder, PTSD, ADHD, as well as lifetime history of substance dependence, psychosis, pervasive developmental disorder, major affective disorder, obsessive compulsive disorder, conduct disorder, anorexia. All subjects will be born to parents with no history of schizophrenia or bipolar disorder.