Multidimensional Scaling of the TAT and the Measurement of Achievement Motivation

Abstract

Subjects rated all pairs of eight TAT cards and ten Rorschach cards for similarity. They were also scored for n-Ach using imagery scoring on stories to TAT cards. Two similarity dimensions were found for the TAT stimuli, identified as number of persons and degree of strong affect. Those high and low on need for achievement for both sexes differed significantly on degree of salience afforded to each dimension, those high weighting the affect dimension more, and those low the person dimension more. Dimensions of the Rorschach found by Wainer et al. (1976) were replicated, but did not discriminate individuals on need for achievement. The results are discussed in terms of the interpretation of the dimensions, the possible relationship of affect to achievement motivation, and the possible practical implications for the use and measurement properties of projective tests.

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