OKLAHOMA PREMORBID INTELLIGENCE ESTIMATION (OPIE) - UTILIZATION IN CLINICAL-SAMPLES

The present research is an effort to evaluate a new method of estimati ng premorbid IQ in which both demographic and current performance meth ods are utilized in a regression algorithm. Two hundred and twenty-sev en patient files from the archives of the University of Oklahoma Healt h Sciences Center were used to evaluate the Oklahoma Premorbid Intelli gence Estimation (OPIE) procedure. This procedure combines both premor bid demographic variables of age, education, occupation, and race with current performance on the WAIS-R Vocabulary and Picture Completion s ubtests in estimating premorbid IQ. The results are presented for clin ical populations including those with dementia, traumatic brain injury , cerebral vascular accident, neoplasm, epilepsy, and a medical contro l chronic pain group. Results indicate that the OPIE produces a less r estricted range of scores than other currently available methods of es timating premorbid IQ without systematic under- or over-estimation of IQ. Considerations for the use of this method with diffuse and cerebra lly lateralized populations are discussed.