Disentangling the Role of Depression in Hypersomnia

Inclusion Criteria: * Males and females between the age of 21 and 55 * Meet DSM5 criteria for Idiopathic Hypersomnia or Hypersomnia Associated with a Psychiatry Disorder * Ability to read and speak English Exclusion Criteria: * Unable or unwilling to provide informed consent * Untreated obstructive sleep apnea (apnea-hypopnea index /= 15 events/hr) * Meeting diagnostic criteria for narcolepsy * A clinically unstable medical condition as defined by a new diagnosis or change in medical management in the previous 2 months (e.g., pneumonia, thyroid disease, ventricular arrhythmias, cirrhosis, surgery, or recently diagnosed cancer) because these changes could impact daytime hypersomnia and confound results * Substance abuse/dependence, delirium, dementia, amnestic disorder, schizophrenia, and other psychotic disorders * Prominent current suicidal or homicidal ideation. * Unable to perform tests due to inability to communicate verbally, inability to read and write; less than a 5th grade reading level; visal, hearing, or cognitive impairment (e.g. previous head injury) * Use of medications or OTC products that might impact sleep