THE INCIDENCE AND UTILITY OF THE ACID, ACIDS, AND SCAD PROFILES IN A REFERRED POPULATION

THE ACID, ACIDS, and SCAD profiles are examples of subtest patterns fr om the WISC-III that have been proposed as potentially helpful in diff erential diagnosis of exceptionalities. This study investigated the pr evalence and utility of these profiles in a large referred population. Although the incidence rates of the ACID and ACIDS profiles in some g roups were greater than rates reported for the standardization sample, incidence levels were found to be low in all clinical groups studied. The SCAD profile evidenced generally higher incidence rates but none greater than the rates reported for the standardization sample. The fi ndings support the use of conditional probabilities and incremental ga ins based on the actual incidence from a referred population to assist in differential diagnosis; however, none of the profiles are recommen ded as a criterion for determining exceptionality.