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The measurement invariance of schizotypy in Europe

Fonseca-Pedrero, E, Ortun˜o-Sierra, J, Sierro, G, Daniel, C, Cella, M, Preti, A, Mohr, C and Mason, O (2015) The measurement invariance of schizotypy in Europe European Psychiatry, 30 (7). pp. 837-844.

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The short version of the Oxford-Liverpool Inventory of Feelings and Experiences (sO-LIFE) is a widely used measure assessing schizotypy. There is limited information, however, on how sO-LIFE scores compare across different countries. The main goal of the present study is to test the measurement invariance of the sO-LIFE scores in a large sample of non-clinical adolescents and young adults from four European countries (UK, Switzerland, Italy, and Spain). The scores were obtained from validated versions of the sO-LIFE in their respective languages. The sample comprised 4190 participants (M = 20.87 years; SD = 3.71 years). The study of the internal structure, using confirmatory factor analysis, revealed that both three (i.e., positive schizotypy, cognitive disorganisation, and introvertive anhedonia) and four-factor (i.e., positive schizotypy, cognitive disorganisation, introvertive anhedonia, and impulsive nonconformity) models fitted the data moderately well. Multi-group confirmatory factor analysis showed that the three-factor model had partial strong measurement invariance across countries. Eight items were non-invariant across samples. Significant statistical differences in the mean scores of the s-OLIFE were found by country. Reliability scores, estimated with Ordinal alpha ranged from 0.75 to 0.87. Using the Item Response Theory framework, the sO-LIFE provides more accuracy information at the medium and high end of the latent trait. The current results show further evidence in support of the psychometric proprieties of the sO-LIFE, provide new information about the cross-cultural equivalence of schizotypy and support the use of this measure to screen for psychotic-like features and liability to psychosis in general population samples from different European countries.

Item Type: Article
Subjects : Psychology
Divisions : Surrey research (other units)
Authors :
Fonseca-Pedrero, E
Ortun˜o-Sierra, J
Sierro, G
Daniel, C
Cella, M
Preti, A
Mohr, C
Date : October 2015
DOI : 10.1016/j.eurpsy.2015.07.005
Copyright Disclaimer : © 2015 Elsevier Masson SAS. All rights reserved.
Uncontrolled Keywords : Schizotypy, Schizotypal, Invariance, Equivalence, Cross-cultural, sO-LIFE
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 10:48
Last Modified : 24 Jan 2020 20:05

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