A Quantitative and Qualitative Report of Psilocybin Induced Mystical-Type Experiences and Their Relation to Lasting Positive Effects
OpenAlex – December 14, 2021
Source: OpenAlex
Summary
Remarkably, psilocybin, a potent hallucinogen, can induce lasting positive psychological changes. Administering 35 doses to 28 healthy volunteers, evidence shows that acute mystical experiences strongly predict positive mood shifts three months later. Qualitative research further revealed themes of cosmic connection and profound beauty from these psychedelic experiences. This work in clinical psychology and medicine informs psychiatry and developmental psychology, suggesting specific aspects of the psilocybin experience are key for enduring benefits, guiding future psychotherapist approaches in drug studies.
Abstract
Psychedelic drugs such as psilocybin are under investigation for the treatment of several psychiatric conditions. They also have the remarkable property of producing persisting positive psychological changes in healthy volunteers for at least several months. In this study, 35 medium-high doses of psilocybin were administered to 28 healthy volunteers (12 females). By the end of the dosing day, participants reported the intensity of their acute experience using the 30-item Mystical Experience Questionnaire (MEQ) and an open-form qualitative report from home. Persisting psychological effects attributed to the psilocybin experience were measured using the Persisting Effects Questionnaire (PEQ) three-months after administration. Using a linear latent-variable model we show that the MEQ total score is positively associated with the later emergence of positive PEQ effects (p = 3x10-5). Moreover, the MEQ subscales “Positive Mood” (pcorr = 4.1x10-4) and “Mysticality” (pcorr = 2.0x10-4) are associated with positive PEQ whereas the subscales “Transcendence of Time and Space” (pcorr = 0.38) and “Ineffability” (pcorr = 0.45) are not. Using natural language pre-processing, we provide the first qualitative descriptions of the “Complete Mystical Experience” induced by orally administered psilocybin in healthy volunteers, revealing themes such as a sense of connection with the universe, familial love, and the experience of profound beauty. Combining qualitative and quantitative methods, this paper expands understanding of the acute psilocybin induced experience in healthy volunteers and suggests an importance of the type of experience in predicting lasting positive effects.