The purpose of this study is to identify the effects of an art therapy program with differential
reinforcement on appropriate behavior(DRA) on reduction in stereotypic behaviors of children with intellectual disabilities and to investigate whether such effects continue after the therapeutic intervention. Three children showing stereotypic behaviors were selected to be the subjects, and multiple baseline design for single subject study was applied in this study. In order to observe the effects of intervention, 4, 6, and 8 program sessions were measured for baseline stage while 20, 18, and 16 program sessions were successively applied for intervention stage. After two weeks of resting period, 5 program sessions were performed for
maintenance stage. The target behaviors of the subjects were observed and recorded ataninterval of 15 seconds according to partial in terval record method, and when they perform appropriate behaviors, the behaviors were stimulated by providingim mediate reinforcement factors. The conclusion from the analysis ofthe results is as follows. Firstly, the art therapy program with differential reinforcement on appropriate behaviors showed positive effects on reduction in the stereotypic behavior of the children with intellectual disabilities. Secondly, the effects of the reduction in the stereotypic behavior of the intellectually disable children when applied of the art therapy with differential reinforcement on appropriate behavior continued even after the period of treatment. Conclusively, "an art therapy program intervention with differential reinforcement on appropriate behavior"will contributet or eductionin stereotypic behaviors of children with intellectual disabilities and the results of the reduction will affect maintaining such effects.
Key Words: Intellectual Disability, Stereotypic Behavior, Differential Reinforcement, Art Therapy