The Altered States Database (ASDB) is an open science project that compiles psychometric questionnaire data on altered states of consciousness experiences induced by various methods. This update reports a systematic literature review following PRISMA guidelines, where 431 items were screened and data from 23 eligible journal articles were extracted, covering literature up to December 31, 2022. The complete dataset is publicly available on the Open Science Framework.
A web-based self-help application called DreamMend, which uses an AI-powered chatbot to deliver imagery rehearsal therapy, reduced nightmare frequency and distress more than a waitlist control over 8 weeks. Nightmare frequency decreased in the intervention group while remaining constant in the control group, and distress decreased significantly more in the intervention group. The findings suggest that digital, AI-supported imagery rehearsal therapy is a feasible and effective self-help intervention for nightmares, though larger and more diverse trials are needed.