| Abstract: | Barona, Reynolds, and Chastain (1984) proposed new demographic information formulas for estimating premorbid Wechsler Adult Intelligence Scales-Revised IQ-scores. Our study was directed toward the following issues: (a) cross-validation of this index on a neurologically normal but clinically relevant criterion group, and (b) determining the neuropsychological utility of the formulas to discriminate between neurologically normal and brain-impaired populations. Our subjects included 80 neurologically normal patients and 83 brain-impaired patients. Cross-validation results generally support the estimation accuracy of the formulas within a neurologically normal clinical sample, although by all three formulas, scores are significantly overestimated. To determine the neuropsychological usefulness of the formulas, we derived a difference score (D-score) cut-point method. D-score diagnostic discrimination of patients was slightly greater than obtained IQs, but not at a statistically significant level. Suggestions for clinical use and further research with the Barona Index are provided. (10 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
