A group of 78 disadvantaged preschoolers was given the Wechsler Intelligence Scale for Children (WISC) and the Peabody Picture Vocabulary Test (PPVT). Despite the significant correlations between the WISC and PPVT IQ scores, comparison of the scores for each child showed little agreement on gross classifications of intelligence. In general, the PPVT IQ scores tended to underestimate the Verbal, Performance, and Full Scale IQ scores of the WISC and to overestimate the incidence of mental retardation. It was concluded that testing young children with the PPVT as the measure of intelligence is of dubious value for research and clinical applications.
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References
1.
American Association on Mental Deficiency. A manual on terminology and classification in mental retardation (2nd ed.). Monograph supplement to the American Journal of Mental Deficiency, 1961.
2.
BrownL. F., & RiceJ.A.Psycholinguistic differentiation of low IQ children. Mental Retardation, 1967, 5, 16-20.
3.
CarrD. L., BrownL. F., & RiceJ.A.The PPVT in the assessment of language deficits. American Journal of Mental Deficiency, 1967, 71, 937-940.
HessR. D., & ShipmanV.C.Early experience and the socialization of cognitive modes in children. Child Development, 1965, 36, 869-886.
7.
KimbrellD.Comparison of Peabody, WISC, and academic achievement scores among educable mental defectives. Psychological Reports, 1960, 7, 502.
8.
RiceJ. A., & BrownL.F.Validity of the Peabody Picture Vocabulary Test in a sample of low IQ children. American Journal of Mental Deficiency, 1967, 71, 602-603.
9.
RieberM., & WomackM.The intelligence of preschool children as related to ethnic and demographic variables. Exceptional Children, 1968, 34, 609-614.
10.
RosenbergL. A., & StroudM.Limitations of brief intelligence testing with young children. Psychological Reports, 1966, 19, 721-722.
11.
RosenthalR., & JacobsenL.Pygmalion in the classroom. New York: Holt, Rinehart & Winston, 1968.
12.
ShawD. J., MatthewsC. G., & Kl⊘veH.The equivalence of WISC and PPVT IQs. American Journal of Mental Deficiency, 1966, 70, 601-604.
13.
ShrinerT. H., & MinerL.Morphological structures in the language of disadvantaged and advantaged children. Journal of Speech and Hearing Research, 1968, 11, 605-610.
14.
WechslerD.Wechsler Intelligence Scale for Children manual. New York: The Psychological Corp., 1949.
