Signed English in the classroom, III. What gets signed?

Abstract
In the second paper of this series we reported evidence, compatible with the results of previous investigations, showing that teachers attempting to produce Signed English were unable to shadow each and every morpheme in their speech with signs. In this paper, detailed analyses of the relation between teacher speech and sign are used to address the question 'What gets signed?'. Generalizations in the literature about the lack of systematicity in the relations between sign and speech are challenged in the light of findings which show that both morpho-syntactic status and pragmatic factors are predictive of which morphemes in teacher speech will be accompanied by sign. The results are also discussed in relation to recent studies of the relations between the structure of speech and features of non-verbal movements which accompany the act of speaking. These studies provide a source of hypotheses about the issue of what gets signed, and why, in Signed English. Also discussed are the educational implications of the current findings for deaf children's acquisition of English.