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Psychometric properties of the Malay Schizotypal Personality Questionnaire: Measurement invariance and latent mean comparisons in Malaysian adults

Barron D, Morgan KD, Towell T, Jaafar JL, Swami V

Asia Pac Psychiatry, 2018 Mar;10(1).
PMID: 28677341 DOI: 10.1111/appy.12293

INTRODUCTION: The Schizotypal Personality Questionnaire (SPQ) is a widely used self-report measurement instrument for the assessment of schizotypal personality traits. However, the factor structure of the SPQ has been a matter of some debate. As a contribution to this debate, we examined the factor structure of the SPQ in Malaysian adults.
METHOD: A total of 382 Malaysian adults completed a Malay translation of the SPQ. Confirmatory factory analysis was used to examine the fit of 3- and 4-factor solutions for the higher-order dimensionality of the SPQ. Ethnic invariance for the best-fitting model was tested at the configural, metric, and scalar levels, and a multivariate analysis of variance was used to examine sex and ethnicity differences in domain scores.
RESULTS: The 4-factor model provided a better fit to the data than did the 3-factor model. The 4-factor model also demonstrated partial measurement invariance across ethnic groups. Latent mean comparisons for sex and ethnicity revealed a number of significant differences for both factors, but effect sizes were small.
DISCUSSION: The 4-factor structure of the SPQ received confirmatory support and can be used in Malay-speaking populations.

Matched MeSH terms: Schizotypal Personality Disorder/diagnosis*
Fulltext Psychiatric morbidity in schizophrenic relatives--use of Self-Reporting Questionnaires (SRQ)

Salleh MR

Singapore Med J, 1990 Oct;31(5):457-62.
PMID: 2259943

A validated study of the Self-Reporting Questionnaire (SRQ-20) of the World Health Organization against ICD-9 was found to have good validation indices at the cut-off point of 5/6. The sensitivity was 84.8% and specificity 83.7%. However, SRQ-24 had poor validation indices and are too sensitive to detect psychotic illness. Twenty-three per cent of 264 schizophrenic relatives who had been staying together with them and or actively involved in their care for at least one year had neurotic disorders compared with 1% who had latent schizophrenia. The prevalence of psychiatric morbidity was higher in the first-degree relatives compared with non-first degree relatives.

Matched MeSH terms: Schizotypal Personality Disorder/diagnosis
A reassessment of the higher-order factor structure of the German Schizotypal Personality Questionnaire (SPQ-G) in German-speaking adults

Barron D, Voracek M, Tran US, Ong HS, Morgan KD, Towell T, et al.

Psychiatry Res, 2018 11;269:328-336.
PMID: 30173038 DOI: 10.1016/j.psychres.2018.08.070

The Schizotypal Personality Questionnaire (SPQ) is a widely-used self-report instrument for the assessment of schizotypal personality traits. However, the factor structure of scores on English and non-English translations of the SPQ has been a matter of debate. With little previous factorial evaluation of the German version of the SPQ (SPQ-G), we re-assessed the higher-order factor structure of the measure. A total of 2,428 German-speaking adults from Central Europe (CE) and the United Kingdom (UK) completed the SPQ-G. Confirmatory factor analysis - testing proposed 2-, 3-, and 4-factor models of SPQ-G scores - indicated that the 4-factor solution had best fit. Partial measurement invariance across cultural group (CE and UK) and sex was obtained for the 4-factor model. Further analyses showed CE participants had significantly higher scores than UK participants on one schizotypal facet. These results suggest that scores on the SPQ-G are best explained in terms of a higher-order, 4-factor solution in German migrant and non-migrant adults.

Matched MeSH terms: Schizotypal Personality Disorder/diagnosis*

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