Comparison of Three Intellectual Screening Tests in a Rehabilitation Setting

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Abstract
Scores from three brief intellectual screening instruments were compared with WAIS IQs. The Quick Test, the Peabody Picture Vocabulary Test, the Revised Beta, and the WAIS were administered to 70 clients of a vocational rehabilitation center. All IQ estimates from the brief measures correlated highly with WAIS IQs. The Quick Test and the Peabody significantly underestimated the WAIS Verbal IQ. No differences were found between any of the brief measures and the WAIS Performance Scale or Full Scale. The Quick Test showed the greatest agreement with the WAIS when clients were classified into categories of intelligence based on their test scores.