Earlier research based on 81 Occupational Reinforcer Patterns (ORPs) suggested a nine-category classification of occupations. The present research, based on 148 ORPs, investigated the ability of that classificatory system to assimilate new information. Cluster analysis of the 148 ORPs yielded an eight-category classification of occupations in which five of the original occupational clusters appeared virtually unchanged; the other four original clusters were combined into two occupational clusters. One new cluster was identified. Principal factors analysis was employed to study the factor structure of the occupational reinforcers and to highlight the essential nature of the classificatory system. Five reinforcer factors were identified.
Bibliographical noteFunding Information:
IThis study was supported in part by Research Grant 12-P-55192 from the Social and Rehabilitation Service, U.S. Department of Health, Education, and Welfare. 2Requests for reprints should be sent to David J. Weiss, Department of Psychology, Elliott Hall, University of Minnesota, Minneapolis, Minnesota 55455.