PEQ

The Persisting Effects Questionnaire (PEQ) is a self-report measure developed at Johns Hopkins University to assess lasting changes in attitudes, moods, behaviors, and spiritual practices attributed to psychedelic experiences. Administered weeks or months after a session, it captures whether participants perceive enduring positive or negative effects. The PEQ covers changes in personal well-being, life satisfaction, relationships with others, relationship to one’s own body, spirituality/sense of meaning, and behavioral changes. Respondents rate whether changes occurred and their magnitude on a 6-point scale. The PEQ has been particularly informative in the Johns Hopkins healthy volunteer studies (Griffiths et al.), where participants rated psilocybin sessions among the most meaningful and spiritually significant experiences of their lives at 14-month follow-up. It provides unique longitudinal data about the perceived durability and real-world significance of psychedelic-facilitated experiences.