SIESTA: Sleep Intervention to Enhance Cognitive Status and Reduce Beta Amyloid

Inclusion Criteria: * Report of difficulty falling asleep, maintaining sleep, or waking up too early at least three nights a week for the past six months * A score of greater than, or equal to, ten on the Insomnia Severity Index * A score of greater than, or equal to, twenty-five on the Mini-Mental State Examination (MMSE) * A score of less than, or equal to, two on the Dementia Screening Interview (AD8) Exclusion Criteria: * A known untreated sleep disorder (i.e., sleep apnea or restless leg syndrome) * Currently taking benzodiazepines, non-benzodiazepines, melatonin supplements, or agonists for insomnia * A score of greater than, or equal to, fifteen on the Patient Health Questionnaire (PHQ-9) indicating severe depression or endorsement of any suicidal ideation (an answer of one, two, or three on item number nine of the PHQ-9) * History of drug or alcohol abuse as defined by the Diagnostic and Statistical Manual of Mental Disorders-IV (DSM-4) criteria within the last two years * History of a nervous system disorder (i.e., stroke, Parkinson's Disease) * Severe mental illness (i.e., Schizophrenia, Bipolar Disorder) * History of a learning disability or attention-deficit/hyperactivity disorder * Current, or history of, shift work * Currently receiving CBT-I treatment * Unable to hear at a conversational level * Failure of a near vision test utilizing the Logarithmic Near Visual Acuity Chart