Summary
This study with the Police Department of Oakland, California, supports results obtained earlier with the Maryland State Police concerning the personological correlates of competent police work. With use of the California Psychological Inventory and 229 men, the paper provides evidence on three points: (a) the modal personality of police; (b) the personality characteristics associated with persistence in police work; and (c) the personality correlates of effective performance. These samples of American police were found to be masculine, self-confident, and socially effective. Good police are characterized by functional intelligence, achievement motivation, and social poise.