Validation of the Oxford- Liverpool Inventory of Feelings and Experiences (O-LIFE) Questionnaire

AUTHORS

Hassan Yaghoubi 1 , * , Ali Mohammadzadeh 2

AUTHORS INFORMATION

1 Department of Psychology, Faculty of Education and Psychology, Azarbaijan Shahid Madani University, Tabriz, Iran

2 Department of Psychology, Payam-e-Noor University, Tehran, Iran

ARTICLE INFORMATION

Zahedan Journal of Research in Medical Sciences: 14 (9); e93220
Published Online: October 16, 2012
Article Type: Research Article
Received: January 09, 2011
Accepted: March 02, 2011

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Abstract

Background : The Oxford-Liverpool Inventory of Feelings and Experiences (O-LIFE) is a 104-item tool made based on the factor analysis of 15 available scales to measure schizotypy. This research aims to investigate the psychometric properties of Oxford-Liverpool Inventory of Feelings and Experiences.
Materials and Methods : Conducted as an ex-post facto survey, this study is a descriptive cross–sectional research. A sample of 482 patients was selected and assessed through stratified random sampling from different faculties of Shahid Madani University of Azarbaijan. Data were analyzed using exploratory factor analysis method by means of the Principal Component Analysis method.
Results : Factor analysis using the Principal Component Analysis method extracted five principal factors, which were named cognitive disorganization, impulsive nonconformity, unusual experiences/magical thinking, introvertive anhedonia, and isolation. In addition, two other types of validity (concurrency and correlation of subscales with the total scale and each other) and three types of reliability (test-retest, half-splitting, and internal consistency) were reported.
Conclusion : According to the findings of the present study, O-LIFE has favorable psychometric properties in the Iranian society and is applicable in psychiatric and psychologic researches as a valid tool.

Keywords

Oxford-Liverpool Inventory of feelings and experiences Factor analysis Validity Reliability Validation Schizotypy

© 2012, Zahedan Journal of Research in Medical Sciences. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.
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