To test the relation of operationally derived measures of Id, Ego, and Superego strength and the form of spatial stimulus generalization gradients, 45 adult males were tested and equally divided into three groups on the basis of their scores on the Arrow Dot subtest of the IES test (Dombrose & Slobin, 1958). Generalization gradients were obtained utilizing the technique developed by Brown, Clarke, and Stein (1958). The data revealed significant differences among groups. Ss who were classified as High I and High S exhibited broad generalization gradients while Ss who were High E exhibited little generalization.
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