SENSITIVITY OF THE WAIS-R VERBAL-PERFORMANCE IQ DIFFERENCE AND INTERSUBTEST SCATTER TO TRAUMATIC BRAIN INJURY

The Wechsler Adult Intelligence Scale-Revised (WAIS-R) Verbal IQ-Perfo rmance IQ (VIQ-PIQ) discrepancy and a number oi indices of intersubtes t scatter were examined in 25 subjects with a history of traumatic bra in injury (TBI) and magnetic resonance imagining (MRI) evidence of str uctural brain abnormality. Abnormal VIQ-PIQ differences and scatter in dex values were identified by referring to published normal base rates . Only 16% of the subjects were identified as abnormal on any one of t hese WAIS-R measures, which suggests these measures are largely insens itive to the presence of structural brain abnormality in TBI.