1. Frank Porter Graham Child Development Institute, University of North Carolina, Chapel Hill, NC, USA;
2. Educational Psychology, Texas A&M University, College Station, TX, USA;
3. Educational Studies, Purdue University, West Lafayette, IN, USA;
4. Educational Psychology, Baylor University, Waco, TX, USA;
5. Department of Special Education, Faculty of Education, Eskisehir Osmangazi University, Eskisehir, Turkey;
6. Faculty of Human Sciences, University of Tsukuba, Tsukuba, Japan