The receptive communication abilities of deaf students under oral, manual, and combined methods.

Two groups of severely and profoundly deaf students aged 10 to 17 years were tested on their abilities to choose, from a set of four pictures, the one matching a sentence presented on videotape under 11 different communication conditions. The communication conditions involved individual and combined presentations of lipreading, listening, fingerspelling, and signed English. Severely deaf students scored higher than profoundly deaf students under all conditions except those that involved signed English, where the profoundly deaf group scored as high as the severely deaf group. All the students scored higher under conditions that involved audition, including lipreading plus audition, than under audition alone. The discussion of the results highlights methodological problems that made it difficult to interpret some previous studies in this area. Practical implications of the results for both oral education of the deaf and simultaneous communication are also discussed.