Ammons' Quick Test as a Measure of Adult Intelligence in a Psychiatric Sample

Abstract

This study was designed to determine if the Ammons' Quick Test could be used as an accurate test of general intelligence for VA psychiatric inpatients. Although some research suggests that QT scores generally correlate quite highly with other measures of intelligence, little has been done to determine the range of accuracy for the QT IQ scores. The QT and WAIS were administered to 61 psychiatric inpatients. Although the tests correlated .76, polynomial regression analyses of difference scores indicated that for this sample the QT scores overestimate Full Scale WAIS scores in the lower IQ ranges and underestimate WAIS scores in the upper IQ ranges. The results suggest that clinicians should be cautious in using QT IQ scores, based on recognition of meaning, as estimates of WAIS Full Scale IQ scores, based on a variety of verbal and performance measures.