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Autism
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*Asperger's Syndrome
*Autism
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Factor analysis of the Autism Spectrum Screening Questionnaire

Maj-Britt Posserud

Centre for Child and Adolescent Mental Health, University of Bergen, Norway, maj-britt.posserud{at}rbup.uib.no

Astri J. Lundervold

Centre for Child and Adolescent Mental Health, and Department of Biological and medical Psychology, University of Bergen, Norway

Maaike C. Steijnen

Centre for Child and Adolescent Mental Health, University of Bergen, Norway

Sophie Verhoeven

Centre for Child and Adolescent Mental Health, University of Bergen, Norway

Kjell Morten Stormark

Centre for Child and Adolescent Mental Health, University of Bergen, Norway

Christopher Gillberg

Child and Adolescent Psychiatry, Göteburg University, Sweden

The present study investigated the factor structure of parent and teacher Autism Spectrum Screening Questionnaire (ASSQ) in a population of 7—9 years old children. For validation purposes, factors derived were correlated with results on the Strengths and Difficulties Questionnaire (SDQ). A three-factor solution was identified on both parent and teacher ASSQ. Most of the variance was explained by one factor including measures of social function, validated by a high correlation with the SDQ peer problems scale. The second factor included measures of autism-associated problems. The items allocated to the third factor were more specific for a cognitive style typically found in high-functioning individuals with autism/Asperger syndrome. This factor did not correlate highly with any of the SDQ subscales. The results indicated that the screening efficiency of ASSQ could be increased by closer examination of the individual profile of factor scores.

Key Words: Asperger syndrome • Autism Spectrum Screening Questionnaire • factor analysis • Norway • screening

Autism, Vol. 12, No. 1, 99-112 (2008)
DOI: 10.1177/1362361307085268
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