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Marcio S. C. Longo

3 papers in the library · 15 citations · publishing 2022-2026

Papers

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Prior ayahuasca experience is associated with improved mental health: observational data from ritualistic settings

npj Mental Health Research September 10, 2026 Lucas V. M. Cruz, Marcio S. C. Longo, Rafael Rodrigues et al.

Abstract This observational survey study investigated the relationship between prior ayahuasca experience and mental health and mindset outcomes. Participants planning to attend an ayahuasca ceremony completed a survey before their upcoming ayahuasca use. Measures included substance use, depression, anxiety, stress, spiritual well-being, aberrant salience, and metaphysical beliefs. Participants...

Adaptation and latent structure of the Brazilian version of the Ego Dissolution Inventory (EDI-BR): an exploratory study

Trends in Psychiatry and Psychotherapy October 18, 2022 Bheatrix Bienemann, Mariana Ridolfi, Marco Multedo et al. 5 citations

The validated scale showed solid psychometric properties, with potential differences in factor structure in relation to the English version. Considering validation is an ongoing process, it is recommended that studies be conducted comparing ego dissolution scores across distinct substances and different regions of the country.

The Association of Classic Serotonergic Psychedelic Use and Intention of Future Use with Nature Relatedness

Journal of Psychoactive Drugs August 19, 2022 Marcio S. C. Longo, Bheatrix Bienemann, Marco Multedo et al. 10 citations

This study sought to investigate the effects of different substances on nature relatedness (NR) in the general population. An online cross-sectional survey done in Brazil investigated use of ayahuasca/DMT, psilocybe mushrooms, LSD, MDMA/ecstasy, cocaine, cannabis, and alcohol. NR was assessed using the short-form version of the nature related scale (NR-6). One-way analysis of variance (ANOVA)...