This study, co-authored by Can-Change members Dr. Codie Rouleau and Dr. Tavis Campbell, is a secondary analysis of a randomized controlled trial comparing mindfulness-based cancer recovery (MBCR) to cognitive behavior therapy for insomnia (CBT-I) in cancer patients with insomnia. Changes in dysfunctional sleep beliefs produced by the CBT-I group exceeded those produced by MBCR at post-program and follow-up (P < .001), supporting the use of both CBT-I and MBCR to reduce insomnia severity.