Deaf children (age 7–10) of deaf and of hearing parents (DDP, DHP), shown ten two-sentence sequences produced by a native ASL signer, repeated what they saw. The signing of DDP and DHP differed significantly in morphology (specifically, in correct noun phrases, verb phrases, movement roots, movement affixes, noun agreement markers, and noun placement morphemes) and in overall errors. It differed also but non-significantly in sentence syntax. The evidence suggests that for deaf children learning a sign language, fluency is a function of linguistic experience and motor ability. Cognitive ability, also a factor in determining productive fluency (4, 19), was not addressed in this study.