References:

Wolff, M., Mertens, L.J., Walter, M., Enge, S., & Evens, R. (2022). The Acceptance/Avoidance-Promoting Experiences Questionnaire (APEQ): A theory-based approach to psychedelic drugs' effects on psychological flexibility. Journal of Psychopharmacology, 36(3), 387-408. DOI: 10.1177/02698811211073758

Soto-Angona, Ó, Rodríguez-Urrutia, A., Ramos-Quiroga, J.A., Álvarez-Bobo, Ó., Ona, G., Pérez Rosal, S., París-Pérez, J., & Wolff, M. (2025). Accept to change: Translation and validation of the Acceptance/Avoidance-Promoting Experiences Questionnaire (APEQ) in an international survey of Spanish-speaking psychedelic users. Journal of Contextual Behavioral Science, 37, 100923. https://doi.org/10.1016/j.jcbs.2025.100923