1. Communication Disorders, University of Arkansas, 606 N. Razorback Road, Fayetteville, AR 72701, USA
2. Department of Curriculum & Instruction, University of Connecticut, 249 Glenbrook Road, Storrs, CT 06269, USA
3. Education of the Deaf and Hard of Hearing, University of Tennessee, 1122 Volunteer Blvd., BEC A214, Knoxville, TN 37996, USA
4. Washington School for the Deaf, 611 Grand Blvd., Vancouver, WA 98661, USA