OAV and 5D-ASC for Brazilian Portuguese: A validation and adaptation study.
Journal of psychopharmacology (Oxford, England) June 28, 2025 Rafael S Rodrigues, Isabel Wießner, Dimitri Daldegan-Bueno et al. 6 citations
Two scales that measure altered states of consciousness—the OAV and the 5D-ASC—were adapted and validated for Brazilian Portuguese through expert review and back-translation. In an online survey of 3762 people recounting their psychedelic experiences, factor analyses confirmed an 11-factor structure for the OAV and a 6-factor structure for the 5D-ASC, both with strong internal consistency (α > 0.76). Convergent validity was supported by significant correlations with the Mystical Experience Questionnaire and Ego Dissolution Inventory. Factor scores differed by substance, setting, and meditation frequency; ayahuasca and DMT experiences produced higher oceanic boundlessness and anxious ego-dissolution scores. The scales show reliable psychometric properties for Brazil, though sample homogeneity and recall bias are limitations.