Examination of Single-Subject Researchs on Individuals with Multiple Disabilities: Systematic Review

Studies on individuals with multiple disabilities are essential for their active participant in life as well as their life quality. Many target behaviors addressed in these studies are often vital for individuals with multiple disabilities. Studies on individuals with multiple disabilities are essential since such studies aim to meet both educational and daily needs of those individuals. Most of the target behaviors dealt with in these studies are vital for individuals with multiple disabilities. The purpose of this study is to analyze existing single-subject research on individuals with multiple disabilities in terms of age range and number of participants, dependent and independent variables, settings, research model, reliability, validity, and non-overlapping data (PND) percentages. Initially, the research that fell within the scope of this study was scanned electronically. Following index scanning, the bibliographies were scanned manually. As a result, a total of 54 articles and 2 dissertations were obtained. A set of inclusion criteria was used to select the ones to be included in the meta-analysis, which yielded 14 studies to be considered for criteria and the meta-analysis. Findings of the analysis, discussed in various contexts, have demonstrated that the majority of the studies have a large PND effect size. Some suggestions have been made for further research, as well.