Özet:

The social validity assessment is often seen in studies conducted on the basis of single-parallel research models in the field of special education and is evaluated as part of single-parallel research and presented as a quality indicator (Storey and Horner, 1991). This study is important for the study of social validity data in the postgraduate special education theses, especially for the presentation of clues for the development of the social validity dimension to enhance the research quality of the studies carried out on the basis of single-level research models. The study aimed at determining the approaches to assessing the concept of social validity in accessible graduate studies in the field of private education between 2008-2018 years. In accordance with the specific purpose, the social validity data, the type of thesis, the years, the social validity data collection tools and the data collected groups have been examined by the situation analysis. The study examined the concept of social validity of postgraduate theses published in the National Thesis Center on the basis of a single parallel research model in the field of special education between 2008-2018 and the presentations. Depending on the research questions of the study in the review, the visual research model in the scan model was preferred to be able to summarize the frequencies. In view of the findings, the consideration and presentation of social validity data in the theses in the years, the social validity data collection tools and the data collected groups did not differ at the doctoral and master's level, the subjective assessment approach was preferred from the assessment approaches of social validity data in almost all of the graduate studies, while mostly the social validity data was collected directly from the group affected using a semi-structured conversation form.