Fonseca-Pedrero, E;
Ortuño-Sierra, J;
Sierro, G;
Daniel, C;
Cella, M;
Preti, A;
Mohr, C;
(2015)
The measurement invariance of schizotypy in Europe.
European Psychiatry
, 30
(7)
pp. 837-844.
10.1016/j.eurpsy.2015.07.005.
Preview |
Text
Mason_Invariance_OLIFE_final_secondversion.pdf - Accepted Version Download (491kB) | Preview |
Abstract
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.
| Type: | Article |
|---|---|
| Title: | The measurement invariance of schizotypy in Europe |
| Location: | France |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.eurpsy.2015.07.005 |
| Publisher version: | http://dx.doi.org/10.1016/j.eurpsy.2015.07.005 |
| Language: | English |
| Additional information: | Copyright © 2015. This manuscript version is published under a Creative Commons Attribution Non-commercial Non-derivative 4.0 International licence (CC BY-NC-ND 4.0). This licence allows you to share, copy, distribute and transmit the work for personal and non-commercial use providing author and publisher attribution is clearly stated. Further details about CC BY licences are available at http://creativecommons.org/licenses/by/4.0. Access may be initially restricted by the publisher. |
| Keywords: | Cross-cultural, Equivalence, Invariance, Schizotypal, Schizotypy, sO-LIFE, Adolescent, Adult, Europe, Factor Analysis, Statistical, Female, Humans, Italy, Male, Personality Inventory, Phenotype, Psychometrics, Psychotic Disorders, Reproducibility of Results, Schizotypal Personality Disorder, Spain, Surveys and Questionnaires, Switzerland, Young Adult |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1482941 |
Archive Staff Only
 |
View Item |
