Edited by Gary Morgan
[Trends in Language Acquisition Research 25] 2020
► pp. 93–113
The most accessible language for deaf children is generally a sign language, but few children have input in sign languages early in life. Late first-language acquisition of a sign language reveals age of acquisition effects that must be taken into consideration by linguistic theories of acquisition. When deaf children access spoken language through a cochlear implant, age of acquisition effects can again be seen, and the presence or absence of sign language is an important factor in language outcomes. Finally, the development of a sign language as a second language in unique contexts such as that of Christopher, a polyglot savant, can reveal more about the nature of language development and the theories of language structure that must be posited.