Examining changes in personality following shamanic ceremonial use of ayahuasca.
Abstract
The present study examines the association between the ceremonial use of ayahuasca-a decoction combining the Banistereopsis caapi vine and N,N-Dimethyltryptamine-containing plants-and changes in personality traits as conceived by the Five-Factor model (FFM). We also examine the degree to which demographic characteristics, baseline personality, and acute post-ayahuasca experiences affect personality change. Participants recruited from three ayahuasca healing and spiritual centers in South and Central America (N = 256) completed self-report measures of personality at three timepoints (Baseline, Post, 3-month Follow-up). Informant-report measures of the FFM were also obtained (N = 110). Linear mixed models were used to examine changes in personality and the moderation of those changes by covariates. The most pronounced change was a reduction in Neuroticism dz<sub>self-reportT1-T2</sub> = - 1.00; dz<sub>self-reportT1-T3</sub> = - .85; dz<sub>informant-reportT1-T3</sub> = - .62), reflected in self- and informant-report data. Moderation of personality change by baseline personality, acute experiences, and purgative experiences was also observed.
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