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. 1999 Nov:175:444-51.
doi: 10.1192/bjp.175.5.444.

Autism screening questionnaire: diagnostic validity

S K Berument  1 , M Rutter, C Lord, A Pickles, A Bailey
Affiliations

Autism screening questionnaire: diagnostic validity

S K Berument et al. Br J Psychiatry. 1999 Nov.

Abstract

Background: Good interview and diagnostic measures for autism and other pervasive developmental disorders (PDDs) are available but there is a lack of a good screening questionnaire.

Aims: To develop and test a screening questionnaire based on items in the best available diagnostic interview--the Autism Diagnostic Interview--Revised (ADI-R).

Method: A 40-item scale, the Autism Screening Questionnaire (ASQ), was developed and tested on a sample of 160 individuals with PDD and 40 with non-PDD diagnoses.

Results: The ASQ has good discriminative validity with respect to the separation of PDD from non-PDD diagnoses at all IQ levels, with a cut-off of 15 proving most effective. The differentiation between autism and other varieties of PDD was weaker.

Conclusions: The ASQ is an effective screening questionnaire for PDD.

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