Procedures
Insomnia
This study was approved by Monash University Human Research Ethics Committee and was promoted as the “Novel Insomnia Treatment Experiment (NITE).” It was advertised at the Monash University Healthy Sleep Clinic (Victoria, Australia), online (e.g. relevant online forums, social media, websites, podcasts), and in public spaces (e.g. notice boards).Interested participants provided informed consent online, and then completed a telephone screening interview to determine eligibility. Eligible participants were randomized at the end of the call. Online questionnaires were administered via REDCap (Baseline) and post-intervention (Post). All participants completed two meetings (in-person or video conference), at Baseline for orientation (~30 minutes), and 1 week later for the intervention content (~60 minutes for the Intervention and ~30 minutes for Control groups). All participants received four phone calls: (1) the screening call, (2) check-in calls 1 and 4 weeks after baseline (~10 minutes each) to encourage adherence and troubleshooting, (3) a final telephone call made by a researcher blinded to group allocation at post-intervention to administer the DSISD Insomnia module (~10 minutes).Following the final assessment and return of research equipment, participants received up to 70 AUD in a gift voucher as a token of appreciation for participation. The gift voucher amount was calculated based on 10 AUD for each week the Fitbit was used for seven nights, and the sleep diary was completed for five nights, up to 50 AUD for 5 weeks of participation. All participants received 20 AUD for completing online questionnaires.