The burgeoning of research on signed language during the last two decades has had a major influence on several disciplines concerned with mind and language, including linguistics, neuroscience, cognitive psychology, child language acquisition, sociolinguistics, bilingualism, and deaf education. The genealogy of this research can be traced to a remarkable degree to a single pair of scholars, Ursula Bellugi and Edward Klima, who have conducted their research on signed language and educated scores of scholars in the field since the early 1970s.
"The Signs of Language Revisited" has three...