A number of studies comparing the Wechsler-Bellevue (W-B) and the Wechsler Intelligence Scale for Children (WISC) with the Stanford-Binet (S-B) have been reported. Correlation coefficients between IQs from these Wechsler scales and the S-B have been of the same order (.6 to .9) in normal, neuropsychiatric, and mentally retarded populations (

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attempting to isolate basic dimensions of motivation, did not have the benefit of the factor analytic methods which have enabled Cattell and his co-workers to substantiate the concepts of drive, ego structure, and sentiment. On the assumption that factor analysis of many scores obtained on objective attitude measuring devices would reveal a limited number of motivational components which could account for the multitude of phenomena observed in dynamic behavior, Cattell pioneered three researches: an R-technique study to isolate and identify the basic motivational determinants (Cattell, 1950), another R-technique study to confirm the findings of the first and to develop alternative objective measuring methods (Cattell & Miller, 1952), and a P-technique study to confirm further and to clarify the ideas elicited by the other two studies as well as to investigate the applicability of these ideas to an individual (Cattell & Cross, 1952). The present case study continues this line of research.The objective here was to discover the motivational dimensions of an institutionalized mental defective by objective P-technique factor analysis and to ascertain whether the findings were congruent with clinical understanding of the case and with earlier factor analytic results on nondefectives.

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