Sign Language Research and Linguistic Theory

Abstract

Linguistic theory has traditionally defined language in terms of speech and has, as a result, labelled sign languages as non-linguistic systems. Recent advances in sign language linguistic research, however, indicate that modern linguistic theory must include sign language research and theory. This paper examines the historical bias linguistic theory has maintained towards sign languages and refutes the classification of sign languages as contrived artificial systems by surveying current linguistic research into American Sign Language. The growing body of American Sign Language research demonstrates that a signed language can have all the structural levels of spoken language despite its visual-spatial mode. This research also indicates that signed languages are an important source of linguistic data that can help further develop a cognitive linguistic theory.