An intriguing psychedelic assessment is back from the dead, thanks to Swiss scientists

The Psychedelic Experience Scale ( PES ) was originally developed by Walter Pahnke and William Richards in the 1960s and 1970s .

Modern researchers have employed the Mystical Experience Questionnaire ( MEQ ), which was derived from the PES , to assess subjective effects of psychedelic substances.

By reviving and updating the questionnaire, researchers can better understand the effects of the psychedelic experience.

The MEQ includes transcendence of time and space as one of the four core components of mystical experiences induced by psychedelics.

Researchers found evidence that such transcendental experiences might not always be part of what is traditionally considered a mystical experience.

The refinement of the PES is a potentially significant advancement in the field of psychedelic research.