The authors investigated differences in the job satisfaction and group cohesiveness of blue-collar and white-collar workers under participative and authoritative leadership styles for Negroes and whites. The Job Descriptive Index, Seashore's measure of group cohesiveness, and Likert's "Profile of Organizational Characteristics" were used. Some findings were: (1) both races had higher job satisfaction with work, supervision, co-workers, pay, and promotion under participative than under authoritative leadership style; (2) the more participative the leadership style the higher group cohesiveness; (3) there is substantially high correlation between supervisory style and group cohesiveness; (4) the highest correlation was between leadership style and job satisfaction with supervision and between group cohesiveness and co-workers; (5) the most powerful discriminant variable between Negro and white blue-collar and white-collar workers was followed by promotion, supervision, and group cohesiveness; (6) race tends to have limited influence on the job satisfaction of workers, but the study showed greater differences between Negroes and whites in relation to their jobs; and (7) in general there was substantial positive correlation between determinants of job satisfaction, leadership style, and group cohesiveness. (Author)