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Tiago Bortolini

2 papers in the library · publishing 2026

Papers

Prevalence estimates of nonordinary experiences depend on validity and measurement choices

Communications Psychology May 8, 2026 Ronald Fischer, Giovanna Bortolini, Tiago Bortolini et al.

Nonordinary experiences (NOEs) such as déjà vu, intense compassion, and out-of-body sensations are common in the general population, but how researchers ask about them greatly affects reported prevalence. A mental health framing and yes/no response options both lower prevalence rates, while item clarity raises them. Across six studies totaling over 37,000 participants, déjà vu and unusually intense experiences of compassion and love were most prevalent (over 70%), while perceptions of animated objects, devotion to objects or individuals, out-of-body experiences, and seeing lights were rarer (over 13%). Despite framing and response-format effects, relative lifetime prevalence can be estimated consistently. The findings provide a validated tool for systematically identifying these experiences to study consciousness in real-world contexts.

Investigating Mediumship/Possession-Relevant Experiences: Contributions from a Feature-Based, Subject-Dependent Approach to Definition and Measurement.

Transcultural Psychiatry July 2, 2026 Everton de Oliveira Maraldi, Ronald Fischer, Maria Vitoria de Lima Varejão et al.

A new feature-based, subject-centered approach to measuring mediumship and possession-like experiences was developed and validated in Brazil, where such traditions are rich. Ten key phenomenological features were identified through a multi-step process involving systematic review, input from practitioners and religious leaders, and validation in a Brazilian population sample. Some of these experiences were reported by more than 60% of participants, indicating high prevalence. The findings underscore the value of culturally sensitive, feature-based instruments for studying non-ordinary experiences across cultures and provide recommendations for future research on their phenomenology and cultural interpretations.