Experimental results on Tadoma

We have initiated a study of speech perception through the Tadoma method of speechreading. In this method, currently used by a small number of deaf—blind individuals, the receiver places his hand on the face and neck of the speaker and monitors various aspects of the articulatory process to understand speech. Our studies have involved one highly trained Tadoma user as well as several untrained, normal subjects. Experiments have been carried out to determine the general speechreading abilitites of the experienced Tadoma user, to compare performance of trained and untrained subjects on simple discrimination tasks, and to specify cues used in the perception of phonemes through Tadoma. Some results from these studies will be presented and discussed.