Assessing the accuracy of the WISC-IV seven-subtest short form and the child and adolescent intellectual disability screening questionnaire in identifying intellectual disability in children.

Little research has been conducted into the accuracy of abbreviated assessments in identifying children and young people with an intellectual disability (ID). The present study compared two such methods in a clinical population of individuals with (n = 106) and without (n = 170) ID: a 7-subtest short form of the Wechsler Adult Intelligence Scales for Children--fourth edition (WISC-IV) proposed by Crawford and colleagues and the Child and Adolescent Intellectual Disability Screening Questionnaire (CAIDS-Q). Both the CAIDS-Q and the WISC-IV short form had high and comparable levels of predicting group classification (88% and 91% correct classification, respectively). Both methods would appear to offer clinicians and researchers an efficient and accurate means of identifying those who are likely to have ID. The WISC-IV short form was slightly more accurate, but the CAIDS-Q may offer the advantages of being shorter to administer and having no requirement for the user to have a particular qualification or training.