Conventional sign language used by a community of signers over generations was compared with gestures invented by a deaf child over a period of years and with gestures invented by nonsigning hearing individuals on the spot. Findings suggest that an individual can introduce standards of well-formedness, but construction of standards requires…

Describes a study that found, contrary to previous reports, that a strong, symmetrical release from proactive interference (PI) is the normal outcome for switches between American Sign Language (ASL) signs and English words and with switches between Manual and English alphabet characters. Subjects were college students enrolled in their first ASL…

A collection of research materials on sign language and primatology is presented here. The essays attempt to show that: sign language is a legitimate language that can be learned not only by humans but by nonhuman primates as well, and nonhuman primates have the capability to acquire a human language using a different mode. The following…

This report is a cross-linguistic study that compares the sequence of emergence of semantic relations in English with the sequence of emergence of these relations in the acquisition of American Sign Language. American Sign Language (ASL) differs from English in modality (it is a visual-gesture language rather than an auditory-vocal one) and in the…