Inclusion Criteria:  Females or males age 18-50 years DSM-5 diagnosis of schizophrenia, schizoaffective, or schizophreniform disorder Taking antipsychotic medication for >7 weeks and on current doses for 4 weeks, and/or injectable depot antipsychotics with no change in the last 3 months Capacity to understand all the potential risks and benefits of the study.  Exclusion Criteria:  DSM-5 alcohol/substance diagnosis (except nicotine) within the last 6 months Taking medications affecting sleep propensity or architecture (other than antipsychotic medication) Initiation of medications known to impact cognition in previous 4 weeks or any change in doses during this period History of seizures/head trauma with loss of consciousness (>10 min) resulting in cognitive sequelae Medical or neurological conditions that could interfere with participation (e.g., untreated hypothyroidism Mental retardation Narcolepsy REM behavior disorder, parasomnias) Pregnant/ nursing Serious homicidal/suicidal risk (past 6 months) Moderate or more severe disorganization (PANSS≥4) Poor English reading ability (WTAR<7) Individuals employed as vehicle drivers/train operators or have occupations in which lapses in sustained vigilance would compromise safety Night shift workers or those with irregular sleep-wake rhythms (based on the week-long home actigraphy; i.e., average bedtime of 11pm±2 hours) Participation in the past 3 months in cognition study