Paolo A M, Ryan J J
Psychology Service, Dwight D. Eisenhower, VA Medical Center, Leavenworth, KS 66048.
J Clin Psychol. 1993 May;49(3):383-5. doi: 10.1002/1097-4679(199305)49:3<383::aid-jclp2270490312>3.0.co;2-d.
A formula for the estimation of abnormal VIQ-PIQ discrepancies was evaluated against the actual distribution of Verbal-Performance difference scores in the WAIS-R old age standardization sample. Results showed that the formula is sufficiently accurate for persons 75 years and older.