Examines the acquisition of conditional sentences in American Sign Language (which entail the use of both manual signs and grammaticized nonmanual facial expressions) by deaf children. The results indicate that children first acquire manual conditional signs before they employ obligatory grammaticized facial expressions, and also acquire manual…

Examines whether manually coded English (MCE) sign language systems are learnable. Reading achievement and expressive English skills of deaf students educated using only a MCE sign system were examined. Deaf students had expressive English skills comparable to hearing students in respect to syntactical and lexical skills but were deficient in…

Using a video sign-monitoring task in American Sign Language, this study investigated the effects of late exposure to a primary language on adult linguistic processing. Native signers were sensitive to errors in both verb agreement and aspect; early and late signers were only sensitive to errors in aspect morphology. Late exposure was found to…