The Jenkins Activity Survey is one of the most widely used methods of assessing Type A behavior. The Jenkins Activity Survey is a psychometric survey of behavior and attitude designed to identify persons showing signs of Type A behavior. The test is multiple choice and self-administered. It was published in 1974 by C. David Jenkins, Stephen Zyzanski, and Ray Rosenman. The terms Type A and Type B personality were originally described in the work of Rosenman and Friedman in 1959.
The Jenkins Activity Survey (JAS) was developed in an attempt to duplicate the clinical assessment of the Type A behavior pattern by employing an objective psychometric procedure. Individuals displaying a Type A behavior pattern are characterized by extremes of competitiveness, striving for achievement and personal recognition, aggressiveness, haste, impatience, explosiveness and loudness in speech, characteristics which the JAS attempts to measure.