Towards a brief Altered States of Consciousness Rating Scale

This study aims to confirm the factor structure of the Altered States of Consciousness scale and to develop a brief alternative based on this structure.

• Is age 18+
• Can read and write in English sufficiently to describe and answer questions regarding a recent psychedelic experience
• Can recall a psychedelic experience that occurred within the last 5 years, and which was produced by just one psychedelic substance (not multiple psychedelic or psychoactive substances).