1. Department of Educational Psychology, Texas A&M University, College Station, TX, USA;
2. Frank Porter Graham Child Development Institute, University of North Carolina, Chapel Hill, NC, USA;
3. Medical Sciences Library, Texas A&M University, College Station, TX, USA;
4. Engelliler Arastirma Enstitusu, Anadolu Universitesi, Eskisehir, Turkey;
5. Department of Educational Studies, Purdue University, West Lafayette, IN, USA;
6. Department of Educational Psychology, Baylor University, Waco, TX, USA