Reliable changes in a variety of behaviors, or classes of behaviors, when only one is manipulated experimentally, have demonstrated that even topographically dissimilar responses can be functionally related. We investigated such a relationship between topographically different child behaviors (compliance and inappropriate activities) by using a methodology that tests for response covariation. Five conditions were provided to sequentially increase and decrease first one and then the other of these behaviors, with the degree of covariation between the two behaviors (i.e., the relationship between changes in the targeted and nontargeted behaviors) being the finding of interest. Results showed that, regardless of the intervention used, the behavior targeted, or the direction manipulated, the nontargeted behavior reliably covaried inversely with the targeted one. The findings have immediate relevance to the clinical treatment of multiple behavior problems exhibited by children. Furthermore, the study of relationships between responses and the processes underlying these relationships can have important implications for understanding the complexity characteristic of human behavior not yet analyzed by behavioral research.
Motivating developmentally disabled children to participate in educational activities can be very difficult. This is especially true for children diagnosed autistic. Because there is some evidence to suggest that stimulus variation may influence motivation, the present study investigated the effects of constant vs. varied reinforcer presentation on correct responding and on-task behavior. Results from a reversal design showed declining trends in both correct responding and on-task behavior when the same reinforcer was consistently presented, whereas, varying the reinforcers produced significantly improved and stable responding. The results are discussed in relation to the literature on stimulus variation and its effects on responsivity.
Present research and legislation regarding mainstreaming autistic children into normal classrooms have raised the importance of studying whether autistic children can benefit from observing normal peer models. The present investigation systematically assessed whether autistic children's learning of discrimination tasks could be improved if they observed normal children perform the tasks correctly. In the context of a multiple baseline design, four autistic children worked on five discrimination tasks that their teachers reported were posing difficulty. Throughout the baseline condition the children evidenced very low levels of correct responding on all five tasks. In the subsequent treatment condition, when normal peers modeled correct responses, the autistic children's correct responding increased dramatically. In each case, the peer modeling procedure produced rapid achievement of the acquisition criterion which was maintained after the peer models were removed. These results are discussed in relation to issues concerning observational learning and in relation to the implications for mainstreaming autistic children into normal classrooms.
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