Affiliation: | 1. Atilim University, Computer Engineering, Kizilcasar Mah., Incek, Ankara 06830, Turkey;2. Middle East Technical University, Computer Education and Instructional Technologies, Universiteler Mah., Çankaya, Ankara 06800, Turkey;3. Gazi University, Department of Education for the Intellectual Disability, Besevler Mah., Çankaya, Ankara 06500, Turkey |