Although past experience may operate to produce an initial increase in undesired behaviors during behavior modification procedures, the data of the present study demonstrate that these behaviors will decrease if the model is not abandoned at the point when the behavior appears to be getting worse rather than better. (Authors)

Results indicate that Ss have a strong tendency to imitate a model, whether or not the model is reinforced or is successfully learning the task. (Author)

Study was aimed at determining whether positive adjectives and negative adjectives possess the oppositeness" (mutual exclusiveness) necessary for their conceptualization as defining the extremes of a single dimension of meaning. (Authors)

The present study represents further tests of hypothesis about peformance in verbal conditioning derived from a demand characteristics approach. (Author)

Results indicated that verb emission increased significantly across time for experimental group subjects as compared with control groups subjects when the operant level procedure was omitted. (Author)

The relative weakness of sex-role labels as reinforcers, and the disappearance of differential effectiveness of male and female labels at the fourth-grade level would appear to be congruent with Kohlberg's (1966) cognitively based theory of sex-role acquisition. (Authors)

Increase in probe accuracy following concurrent training was consistently greater than following serial training. (Authors)