Hearing. Became a teacher of the deaf at the Institute for the Deaf, St. Michielsgestel, The Netherlands, in 1958. Interested in the deaf-blind, he later studied at the Perkins Institute for the Blind, Watertown, MA, and at the Catholic University of Nijmegen, The Netherlands, earning his Ph.D. in 1982. Worked at Florida State University from 1976 on. Developer of a method of teaching deaf-blind children.
Encyclopedia of Special Education, vol.3, p.1616-1617.