Abstract
Recently, Tremont, Hoffman, Scott, and Adams (1998) demonstrated an association between Halstead-Reitan (HRB) and Wechsler Memory Scale (WMS) performance and WAIS-R IQ scores, and recommended that premorbid intellectual estimates be utilized as general indicators of expected neuropsychological test performance. The commentary presented here demonstrates that the relationship between IQ, HRB and WMS is due to shared common factors, and argues against the use of premorbid IQ estimates, because of significant regression to the mean. "Intelligence" is redefined as the composite of neurobehavioral abilities covered in comprehensive neuropsychological assessment.