1. Associate Professor, Dept. of Hearing and Speech Sciences, Vanderbilt Univ. Medical Center, Nashville, TN 37232-8700.
2. Professor, Dept. of Blindness and Low Vision Studies, Western Michigan Univ., 1903 W Michigan Ave., Kalamazoo, MI 49008-5218.
3. Assistant Professor, Dept. of Blindness and Low Vision Studies, Western Michigan Univ., 1903 W Michigan Ave., Kalamazoo, MI 49008-5218.
4. Associate Professor, Dept. of Blindness and Low Vision Studies, Western Michigan Univ., 1903 W Michigan Ave., Kalamazoo, MI 49008-5218.