The persistence of individual differences in phonological development of 10 normally developing children observed at age one and again at age three was studied. The children differed considerably in rate of vocabulary acquisition and relative phonological maturity and also in their general approach to learning. (Author/JDD)

This study found that word learning ability in only 10 of 20 children (ages 7-10) with hearing impairment (HI) was comparable to performance of 20 hearing children matched for receptive vocabulary knowledge. Degree of hearing loss was not related to language or word-learning abilities. Results suggest the coexistence of a language impairment for…

Sign language production of 14 low-functioning students (ages 9 to 20) with autistic disorder were examined. The location aspect of signs was produced more accurately by subjects than either the handshape or movement aspects. Wide individual differences were observed. Sign vocabulary size and accuracy was correlated with performance on two…