A dimensional measure of schizotypy: cross-cultural adaptation and validation of the Oxford-Liverpool Inventory of Feelings and Experiences short version for Brazilian Portuguese (O-LIFE-S).

Letícia Oliveira Alminhana,Otávio Vendramin Dos Santos,Miguel Farias,Wagner De Lara Machado,Marcela Alves Sanseverino,Gordon Claridge

doi:10.1590/2237-6089-2019-0013

Abstract

Introduction The Oxford-Liverpool Inventory of Feelings and Experiences (O-LIFE) is a widely-used scale, and the first to include a dimensional approach to understanding schizotypy.Objective To adapt the short version of the O-LIFE (O-LIFE-S) into Brazilian Portuguese.Method a) Two independent bilingual professionals translated the original instrument into Brazilian Portuguese; b) a third bilingual professional summarized the two translations; c) a fourth bilingual expert translated the Portuguese version back into English; d) this back-translation was adjusted by a committee of psychology experts; e) a pilot study was conducted with 10 participants from the general population.Results O-LIFE-S was considered ready to be used in a formal validation study in Brazil.Conclusion The scale appears to cover the dimensional approach to schizotypy. However, a future validation study needs to be conducted to determine the internal consistency and reliability of the Brazilian Portuguese version of the O-LIFE-S .

Highlights

The Oxford-Liverpool Inventory of Feelings and Experiences (O-LIFE) is a widely-used scale, and the first to include a dimensional approach to understanding schizotypy
There have been several interpretations of schizophrenia, one of which is a dimensional model of psychosis encompassing healthy expressions of psychotic-like features, as a personality trait – schizotypy.[1,2]
The process of adapting a schizotypy measure into Brazilian Portuguese started with a consideration of the theoretical framework of psychoticism as a personality trait continuum, associated with well-being as a benign form of schizotypy or with mental illness at the extreme of this continuum

Summary

Introduction

The Oxford-Liverpool Inventory of Feelings and Experiences (O-LIFE) is a widely-used scale, and the first to include a dimensional approach to understanding schizotypy. Claridge and colleagues describe schizotypy as a personality trait that, within a general population, is underpinned by creativity, spirituality, and divergent thinking, but in its extreme form is a personality disorder.[3] Schizotypy is a multi-factorial construct, which can manifest as well-being or mental illness, depending on environmental context and life events.[4] Following this characterization, one of the most widely-used schizotypy scales, the Oxford-Liverpool Inventory of Feelings and Experiences (O-LIFE)[4,5] comprises four dimensions: 1. Suggested citation: Alminhana LO, Sanseverino MA, Farias M, dos Santos OV, Machado WL, Claridge G, et al A dimensional measure of schizotypy: crosscultural adaptation and validation of the Oxford-Liverpool Inventory of Feelings and Experiences short version for Brazilian Portuguese (O-LIFE-S).

Methods

Results

Conclusion