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Estimating premorbid WAIS‐R intelligence in the elderly: An extension and cross validation of new regression equations
Author(s) -
Paolo Anthony M.,
Ryan Joseph J.,
Tröster Alexander I.
Publication year - 1997
Publication title -
journal of clinical psychology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.124
H-Index - 119
eISSN - 1097-4679
pISSN - 0021-9762
DOI - 10.1002/(sici)1097-4679(199711)53:7<647::aid-jclp2>3.0.co;2-f
Subject(s) - psychology , extension (predicate logic) , regression , wechsler adult intelligence scale , regression analysis , statistics , clinical psychology , cognition , psychoanalysis , psychiatry , mathematics , computer science , programming language
Recently developed equations that combine WAIS‐R subtests and demographic information to estimate premorbid intelligence were evaluated in persons 75 years and older. The equations underestimated the obtained IQs of elderly persons. Therefore, new equations were developed using the old age WAIS‐R standardization sample. The new equations cross‐validated well and demonstrated adequate ability to detect possible intellectual deterioration in a brain damaged sample. The demographic formulas of Barona, Reynolds, and Chastain worked as well as the new equations in suggesting possible deterioration in a sample of elderly persons with chronic and diffuse cognitive impairment. © 1997 John Wiley & Sons, Inc. J Clin Psychol 53 : 647–656, 1997.