Intelligence and Semantic Differential Discriminability

Abstract

240 Ss, subdivided by sex, intelligence (high and low) and grade level (fourth, eighth and twelfth), rated 10 Rorschach cards on each of 15 semantic differential scales. Each S's responses were summarized by the entropy statistic, H, as a measure of discriminability. Discriminability increased as a function of intelligence and of grade level, but not of sex, and there were no significant interactions. However, further analysis showed that the relationship between intelligence and discriminability only prevailed in Grades 4 and 8. Contradictions in the research literature can be resolved with some attention to sample size, age of Ss, stimulus condition, and response measures.

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