Baseline Part 1:~Online demographic and contact information~Schedule Baseline Part 2 with the investigators via online link~1 week of daily sleep diaries~Baseline Part 2:~Internet-based interview with the investigators to confirm study eligibility requirements~Online self-report questionnaires~2 weeks of daily sleep diaries~2 weeks of sleep/wake assessment wearing a watch-like activity monitor (Actiwatch)~Objective Baseline:~Single-night, diagnostic in-home sleep study, including and the following equipment:~Adhesive patch which will adhere to the arm~Sensor belts worn around the chest, fitted with nasal canula, pulse oximeter, and 3 electrodes which will adhere to the back of the neck and behind each ear~Next-day appointment:~Neuropsychological assessment~Structural and functional magnetic resonance imaging scan (MRI)~Non-invasive blood pressure readings~Low-volume Blood draw (used to obtain genetic biomarkers)~Removal of adhesive patch~Next-day evening (2-nights):~Consumable capsule~Sensor belt worn around the chest/abdomen Random Assignment: If it is determined the participant is eligible for the study, participants will be randomly assigned to one of the treatment groups (in-person, telehealth or internet delivered) or asked to wait to start treatment.~Treatment Phase I:~Participants will complete up to 12 weeks of insomnia treatment or wait for treatment (waitlist) 12-Week Post-treatment Part 1:~Complete 2 weeks of an online daily sleep diary and actigraphy~Complete online self-report questionnaires~Objective 12-Week Post-treatment:~• Repeat Objective Baseline outlined above~Treatment Phase II (WLC):~Treatment will start for participants who had been assigned to the waitlist condition 3-Month Follow-Up:~Complete online self-report questionnaires
The purpose of this study is to investigate the mechanisms of change in Cognitive Behavioral Therapy for insomnia (CBTi) in a sample of adults aged 50-65. This study aims to evaluate the pre-post treatment change in sleep, circadian rhythms, biomarkers, cognitive performance, and structural and functional magnetic resonance imaging scans (MRI).