A computerized program was designed to test whether arranging a common element in two, otherwise independent, 2-term correlations (stimulus-stimulus and response-stimulus) would result in emergent simple discriminative-stimulus properties for the antecedent stimulus relative to an arrangement with no common elements programmed. Data from 8 adult participants in this experiment indicate that common element arrangements led to relatively high rates of responding in the presence of the putative discriminative stimulus and relatively low rates or no responding in the presence of the putative s-delta during testing in extinction. Conversely, the uncommon element arrangements produced no clear discriminative control. The current data reflect a comparison of arrangements across subjects. These data support Sidman's (2000) suggestion that common elements among contingencies are sufficient to produce stimulus classes and cause class mergers. The data also have implications for thinking about the mechanism by which and the conditions under which discriminative control develops. Finally, these data have the potential to inform the programming and implementation of reinforcement contingencies in applied settings.

Parent training programs are widely used to remediate ineffective strategies being used by parents of children with maladaptive behaviors. While there are a multitude of parenting workshops available, it has been estimated that over half have no established effectiveness. The purpose of this study was to advance our knowledge regarding the effects of modeling and role-playing (in an experimentally controlled design), used to supplement the parent workshop called “Winning at Parenting” and enhance development of adaptive parenting skills of participants. This study trained parents in the behavioral techniques of clear communication, differential attention, and time-out procedures via modeling by the instructor, roleplaying with the parents, and instructor feedback to parents. A multiple-baseline design across four participants was used in an experimentally controlled manner to demonstrate the positive effect of modeling and role-playing on the development of these adaptive skills in a parent training program. Two research questions were analyzed. The first considered whether participants would increase their use of adaptive parenting strategies via modeling, role-playing and instructor feedback, within the multiple baseline design. The results clearly showed a mean increase in correct demonstration of each target behavior for each parent only after the treatment condition was introduced, indicating a significant treatment effect. Furthermore, because there was no overlap of data points from baseline to treatment, changes in level were evident, providing a strong case that behavior was changed due to treatment effects. Although trend of the behaviors in baseline varied, data points in the treatment phase for each target behavior for each parent made such a dramatic and immediate jump that they each were indicative of a treatment effect. These findings are consistent with previous research demonstrating that the use of modeling and roleplaying are superior to readings and lecture-style for parent training programs. The second question considered whether or not parent’s ratings of competence, depression, and life stress, as measured on the Parenting Stress Index (PSI), would change as a result of the intervention. Results showed no clear trends in data for the effects of treatment on the PSI scores.