To determine the equivalence and relationship of Peabody and WISC scores in a retarded population, 49 students in a class for the educable retarded were tested. The Peabody IQ consistently over-estimated WISC Verbal, Performance, and Full Scale IQs. Intercorrelations between IQs from the two tests were disappointingly low. A more cautious approach to use of the Peabody as a “substitute” measure for the WISC is suggested.
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References
1.
MoedG.WrightB. W.JamesP.Intertest correlations of the Wechsler Intelligence Scale for Children and two picture vocabulary tests. Educational and Psychological Measurement, 1963, 23, 359–363.
2.
ShipeD.Discrepancies between the Peabody Picture Vocabulary Test and the WISC as related to emotional disturbance in children of retarded and normal intelligence. (Doctoral dissertation, George Peabody College for Teachers) Ann Arbor, Mich.: Univer. Microfilms, 1962. (No. 63-1894)
3.
ShipeD.CromwellR.DunnL.Responses of emotionally disturbed and non-disturbed retardates to PPVT items of human vs. non-human content. Journal of Consulting Psychology, 1964, 30, 439–443.