Cited by 637Psychedelics and Drug StudiesParanormal Experiences and BeliefsReligion, Spirituality, and Psychology

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Validation of the revised Mystical Experience Questionnaire in experimental sessions with psilocybin

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Barrett, Frederick S, Johnson, Matthew W, Griffiths, Roland R·2015·Journal of Psychopharmacology

DOI 10.1177/0269881115609019PMC PMC5203697

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Abstract

The 30-item revised Mystical Experience Questionnaire (MEQ30) was previously developed within an online survey of mystical-type experiences occasioned by psilocybin-containing mushrooms. The rated experiences occurred on average eight years before completion of the questionnaire. The current paper validates the MEQ30 using data from experimental studies with controlled doses of psilocybin. Data were pooled and analyzed from five laboratory experiments in which participants ( n=184) received a moderate to high oral dose of psilocybin (at least 20 mg/70 kg). Results of confirmatory factor analysis demonstrate the reliability and internal validity of the MEQ30. Structural equation models demonstrate the external and convergent validity of the MEQ30 by showing that latent variable scores on the MEQ30 positively predict persisting change in attitudes, behavior, and well-being attributed to experiences with psilocybin while controlling for the contribution of the participant-rated intensity of drug effects. These findings support the use of the MEQ30 as an efficient measure of individual mystical experiences. A method to score a “complete mystical experience” that was used in previous versions of the mystical experience questionnaire is validated in the MEQ30, and a stand-alone version of the MEQ30 is provided for use in future research.

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Authors: Barrett, F. S., Johnson, M. W., & Griffiths, R. R.
Affiliations: Johns Hopkins University (US)
Corresponding author: Barrett, Frederick S
ORCID: Barrett, Frederick S
Johnson, Matthew W
Griffiths, Roland R
Venue: Journal of Psychopharmacology
Publisher: SAGE Publications
Published: 2015-10-06
Volume: 29
Issue: 11
Pages: 1182-1190
ISSN: 0269-8811 (ISSN-L)
1461-7285
DOI: 10.1177/0269881115609019
PMC: PMC5203697
OpenAlex: W2340085151
Cited by: 637
References: 34
Citations by year: 2026: 91 · 2025: 110 · 2024: 123 · 2023: 78 · 2022: 78 · 2021: 53 · 2020: 38 · 2019: 12 · 2018: 20 · 2017: 21 · 2016: 12
FWCI: 21.94
Type: journal article
Language: en
Open access: green
www.ncbi.nlm.nih.gov
Licence: journals.sagepub.com/page/policies/text-and-data-mining-license (tdm)
Locations: Journal of Psychopharmacology (publishedVersion)
PubMed (publishedVersion)
PubMed Central (acceptedVersion)
Funders: National Institute on Drug Abuse (R01DA003889, T32DA007209, R01DA03889)
Topics: Social Sciences › Psychology › Clinical Psychology › Psychedelics and Drug Studies
Social Sciences › Psychology › Social Psychology › Paranormal Experiences and Beliefs
Social Sciences › Health › Religion, Spirituality, and Psychology
Keywords: psilocybin, mystical experience, psychedelic drug effects, questionnaire validation, factor structure, convergent validity, attitude change, well-being
MeSH terms: Administration, Oral, Hallucinogens, Humans, Mysticism, Psilocybin, Surveys and Questionnaires

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Validation of the revised Mystical Experience Questionnaire in experimental sessions with psilocybin

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