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

Abstract Objective Existing scales that seek to measure alterations in self-experience were developed based on studies conducted in developed countries. Therefore, the aim of this study was to evaluate the psychometric properties of the Ego Dissolution Inventory (EDI) after translating and adapting it for the Brazilian context. Methods The measure was translated by two translators fluent in both English and Portuguese, followed by back-translation into English to ensure there was no loss of meaning. The scale was used in an online survey exploring substance use. A total of 528 participants answered the full scale. We calculated the Kaiser-Meyer-Olkin (KMO) measure to evaluate sampling adequacy, then ran exploratory factor analysis (EFAs) to investigate the factor structure of the EDI. Results The scale showed acceptable psychometric properties, with excellent internal consistency and sampling adequacy for factor analysis. Kaiser-Guttman's criteria and Hull's method indicated a three-factor solution, while parallel analysis suggested a two-factor solution. All items showed salient loadings, with two items exhibiting cross-loading. Positive but weak correlations were found between EDI factors 1 and 2 and nature relatedness. Conclusions 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.

Health Benefits and Positive Acute Effects of Psilocybin Consumption: A Quantitative Textual Analysis of User Self-Reported Data.

There has been growth in the use of psychedelics by the global population in recent years. In addition to recreational and ritualistic use, recent research into psychedelics has brought advances for treating mental disorders. Understanding the specific circumstances in which psilocybin leads to positive outcomes may have important implications for the future of its clinical use and for harm reduction initiatives. This study aimed to investigate the positive effects from the consumption of psilocybin through public online self-reports. We sought to investigate health benefits promoted by the consumption of the substance, positive acute effects, and contextual details of these experiences. We analyzed 846 reports with the assistance of the IRaMuTeQ textual analysis software, adopting the procedures of Descending Hierarchical Classification, Correspondence Factor Analysis, and Specificities Analysis. The texts were grouped in 5 clusters, describing the content of mental experiences, cognitive processes, somatic experiences, perceptual alterations, and context of administration. The findings of this study reinforce central axes of the psychedelic experience, such as the presence of somatic and visual alterations, connectedness and feeling one with the world and effects of setting, as well as the beneficial character of mystical experiences this substance promotes, and the importance of the ego-dissolution phenomenon.

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

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) was used to assess group differences between substance naïve-individuals, past users, and current users of each substance. Regression models were used including all the substances and subsequently, sociodemographic variables. ANOVAs with substances which showed significantly higher NR-6 scores in the regression model were used in order to assess the effect of intention of future use on NR. ANOVAs indicated higher NR in users of classic serotonergic psychedelics (ayahuasca/DMT, psilocybe mushrooms, LSD), cannabis, and MDMA/ecstasy. Regression models showed that current use of ayahuasca/DMT and psilocybe mushrooms, and past use of LSD had a positive association with NR. When sociodemographic variables were added, only ayahuasca/DMT past and current use were positively associated with NR. Intention of future use was only significantly associated with NR in individuals who reported intention of future use of psilocybe mushrooms.

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

INTRODUCTION: Existing scales that seek to measure alterations in self-experience were based on studies conducted in developed countries. Therefore, the aim of this study was to evaluate the psychometric properties of the Ego-Dissolution Inventory (EDI), translate and adapt it to the Brazilian context. METHODS: Translation of the measure was made by two translators fluent in both English and Portuguese, with back-translation into English to ensure there was no loss of meaning. The scale was included in an online survey exploring substance use. A total of 528 participants answered the full scale. We calculated the Kaiser-Meyer-Olkin (KMO) measure to evaluate sampling adequacy, then ran Exploratory Analysis Factor (EFAs) to investigate the factor structure of the EDI. RESULTS: The scale showed acceptable psychometric properties, with excellent internal consistency and sampling adequacy for a factor analysis. Kaiser-Gutman's criteria and Hull's method pointed to a three-factor solution, while Parallel Analysis suggested a two-factor solution. All items showed salient loadings, with two items exhibiting cross-loading. Positive but weak correlations were found between EDI factors 1 and 2 and nature-relatedness. CONCLUSIONS: The validated scale showed solid psychometric properties, with potential differences in factor structure in relation to the English version. Considering validation as ongoing process, it is recommended to conduct studies comparing the scores of ego dissolution across distinct substances and different regions of the country.