As expected, the PPVT and various forms of the Quick Test, all tests of receptive vocabulary, overestimated the three IQs of the WAIS—R, often by more than half a standard deviation for a small sample (N = 30) of psychiatric in-patients. A restricted range of scores may have contributed to spuriously high correlations among the various measures of IQ.
Get full access to this article
View all access options for this article.
References
1.
AbidinR. R.Jr.ByrneA. V. (1967) Quick Test validation study and examination of form equivalency. Psychological Reports, 20, 735–739.
2.
CarbuhnR. H. (1972) Comparability of WAIS and PPVT measures of intelligence as a function of age and level of mental retardation. Unpublished Master's thesis, Univer. of Oregon, Eugene.
3.
LawJ. G.PriceD. R.HerbertD. A. (1981) Study of Quick Test, WAIS, and premorbid estimates of intelligence for neuropsychiatric patients. Perceptual and Motor Skills, 52, 919–922.
4.
SmithR. S. (1983) A comparison study of the Wechsler Adult Intelligence Scale and the Wechsler Adult Intelligence Scale—Revised in a college population. Journal of Consulting and Clinical Psychology, 51, 414–419.
