Although it has become popular to classify people as Type A or Type B, particularly with reference to their risk for cardiovascular disease, we questioned the accuracy of the layman's evaluation of himself. 56 adults were asked their concepts of their behavior type, and results were compared to their scores on the Jenkins Activity Survey. There was general agreement in the typing and on the other Jenkins subscales. But many who on the Jenkins scale scored Type A felt they were Type B, and some of these scored low on the other three component scales; and many Type B persons called themselves Type A, and some scored high on the other subscales.
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