1. Department of Special Education and Child Development, University of North Carolina, Charlotte, North Carolina, USA
2. Professor Emeritus, University of Western Kentucky, Bowling Green, Kemtucky, USA
3. Professor Emeritus, Northern Illinois University, DeKalb, Illinois, USA
4. Department of Educational Technology and Foundations, University of West Georgia, Carrollton, Georgia, USA
5. Illinois Early Learning Project, University of Illinois at Urbana-Champaign, Champaign, Illinois, USA
6. Department of Communication Sciences and Special Education, University of Georgia, Athens, Georgia, USA
7. PACER Center, Minneapolis, Minnesota, USA
8. Department of Special Education, University of West Georgia, Carrollton, Georgia, USA