Describes a study in which two nonspeech communication systems were evaluated with respect to their efficacy for use with profoundly retarded nonspeech children. Results show that 53 profoundly retarded children who have failed to acquire expressive linguistic skills can succeed with some alternative nonspeech symbol systems, especially with…

Because the relationship of gesticulation to sign language has not received much research attention, this study considers gesture and sign among users of signed and oral languages. Results suggest that gestures produced by deaf individuals can be distinguished from the sign language in which they are embedded, including their semantic and…