Reviews cases which support the view that parts of the left hemisphere control languages, no matter how it is expressed, while right-side regions are involved only in skilled nonlinguistic movements and perceptions. Compares recent findings with previously held theories. (ML)

Videotaped productions of isolated American Sign Language signs or sentences were presented at speeds of two to six times normal. Results indicated a breakdown in intelligibility at around 2.5 to 3 times the normal rate. Results are similar to those found for auditory reception of time-compressed speech suggesting a modality-independent limit to…