Targeting Insomnia to Improve Outcomes in Adults With Problematic Cannabis Use

INCLUSION CRITERIA

* 21 years of age and older, the age needed to obtain full legal access to cannabis in Michigan
* Self-reported chronic insomnia (nighttime symptoms of difficulty initiating and/or maintaining sleep and/or early morning awakenings on ≥3 nights for ≥3 months with daytime impairment), consistent with DSM-5 diagnosis of Insomnia Disorder
* Insomnia Severity Index (ISI) score ≥11, indicative of at least "mild" insomnia
* A positive urine drug screen (UDS) for cannabis33
* Self-reported use of cannabis at least three times weekly for the past month
* Stable residence (e.g., stable sleep arrangements), consistent access to Wi-Fi, and ability to travel to Ann Arbor for sleep laboratory assessments

EXCLUSION CRITERIA

* Individuals who do not understand English (read and spoken)
* Individuals judged unable to provide informed consent (e.g., intoxication, mental incompetence)
* Diagnosis or high suspicion of a sleep disorder other than insomnia
* Lifetime diagnosis of psychotic disorder or bipolar disorder; current post-traumatic stress disorder that directly interferes with sleep
* Terminal or progressive physical illness (e.g., cancer) or neurological degenerative disease (e.g., dementia)
* Use of medications known to have initiated their insomnia (e.g., steroids)
* Previous receipt of CBTi
* Self-reported pregnancy
* Self-reported regular work schedule of rotating or night (3rd) shift work
* Other conditions and situations, medical or otherwise, that preclude meaningful and/or safe participation in CNT/SHE and study procedures