A comparison of the descriptions of cognitive structure yielded by factor analysis and the Hays implication model revealed that while the models produce similar configurations of implicative relationships between traits, the manner in which they dimensionalize cognitive space is markedly different. Psychological relevance of the implication relation as defined by the 2 models was demonstrated in a set of defining experiments. No such relevance was discovered for the manner in which either model dimensionalized cognitive space. In the research separate trait lists were obtained for each S, and data obtained for each S were analyzed separately. Thus the results for each S may be considered as an independent replication of the entire study. (15 ref.)
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