The Rathus Assertiveness Schedule modified for early adolescents

The 30-item Rathus Assertiveness Schedule was modified for the seventh-grade population using the method of peer ratings. Split-half reliability scores are of moderate to high acceptability (N=108, 0.69<r's<0.81,P's<0.01). The method of peer rating itself attained a moderate to high split-half reliability (N=108, 0.46<r's<0.95,P's<0.01). Correlation of the Modified Rathus Assertiveness Schedule with peer ratings established validity in three of the four experimental populations (P<0.05). The results obtained from the present study are comparable to those obtained by S. A. Rathus (Behavior Therapy, 1973b,4, 398–406).The research for this article was cofunded by the National Interagency Council on Smoking and Health and the American Heart Association of Western New York.