Cognition Disorders/diagnosis; Intelligence; Psychotic Disorders/diagnosis; Schizophrenia/diagnosis; Schizophrenic Psychology; Adolescent; Adult; Child; Cognition Disorders/genetics; Cognition Disorders/psychology; Cognition Disorders/rehabilitation; Educational Status; Female; Genetic Predisposition to Disease/genetics; Georgia; Humans; Independent Living/psychology; Longitudinal Studies; Male; Matched-Pair Analysis; Mental Health Services/statistics & numerical data; Prognosis; Prospective Studies; Psychometrics; Psychotic Disorders/genetics; Psychotic Disorders/psychology; Psychotic Disorders/rehabilitation; Rehabilitation, Vocational/psychology; Risk Factors; Schizophrenia/genetics; Schizophrenia/rehabilitation; Utilization Review; Wechsler Scales/statistics & numerical data; Young Adult