Abstract
The purpose of this study was to evaluate the concurrent validity and clinical utility of a short form of the Visual Form Discrimination Test in persons with closed head injuries n 62 Given the homo geneity of the items and patients apparent consistency in responding we hypothesized that scores from an eight item short form would be highly similar to the scores derived from the full version of the test i e 16 items The mean difference between the short form and full version was less than one point and the correlation between the two forms was 0 86 Applying a clinical decision rule resulted in a normal impaired overall correct classification rate of 98 4 The short form shows considerable promise as a brief test of visual discrimination in persons with closed head injuries
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