The acquisition of conditionals in American Sign Language: Grammaticized facial expressions

ABSTRACT An unusual facet of American Sign Language (ASL) is its use of grammaticized facial expression. In this study, we examine the acquisition of conditional sentences in ASL by 14 deaf children (ages 3;3–8;4) of deaf parents. Conditional sentences were chosen because they entail the use of both manual signs and grammaticized non-manual facial expressions. The results indicate that the children first acquire manual conditional signs, e.g., SUPPOSE, before they use the obligatory grammaticized conditional facial expression. Moreover, the children acquire the constellation of obligatory non-manual behaviors component by component, rather than holistically.