The Rosenzweig Picture-Frustration Study (P-F) is widely used as a clinical-and research measure of verbal aggression, although its validity has not been clearly established. Most validating studies have attempted to correlate a specific criterion of aggression with the P-F scoring term "extrapunitiveness" (E)-defined as the percentage of responses in which the individual turns his aggression outward, against the environment. For example, Fry (1949), Holzberg and Hahn (1952), Vane (1954), and Weinberg (1952 have all found that juvenile delinquents or adult criminal offenders fail to manifest more E on the P-F than nonantisocial subjects (5s), and have therefore concluded that the P-F is not valid. That such studies may represent too narrow an approach to validation is indicated by the APA Committee on Test Standards (1954, pp. 14-15) who note that test validity in the case of most clinical instruments must be evaluated by integrating evidence from many different sources and that often no single criterion measure or composite criterion can be identified. Thus aggression may occur in many different degrees, in many different situations, and in many different forms. Conversely, similar degrees of aggression could be expressed in different ways. It therefore may not be reasonable to expect that any particular measure of aggression which is arbitrarily selected as the single and specific criterion