Deafness and immediate memory for pictures: dissociations between "inner speech" and the "inner ear"?

Born-deaf, orally trained youngsters were examined on two tasks of immediate memory for pictures of objects. The aim was to investigate the extent of speech coding for pictures in immediate memory in a developmental context. The deaf, unlike young hearing children, did not use picture-name rhyme spontaneously as a cue to recall in a paired association task. Nevertheless, they were just as sensitive as reading age-matched hearing controls to spoken word length in recalling pictures by name. This might mean that the deaf use articulatory rehearsal in some immediate memory tasks, but this leads to a paradoxical conclusion. What could "inner speech" in the deaf be for, if it fails to affect their "inner ear" by inducing rhyme sensitivity in the paired associate task? This paradox is discussed in relation to distinctions between covert and overt use of memory cues in the paired recall task and to possible sources of the word length effect in young hearing (8-9 years old) and deaf subjects.