This study examined 40 deaf and 20 hearing adolescent students' free recall of visually presented words varied systematically with respect of signability (i.e., words that could be expressed by a single sign) and visual imagery. Results underline the importance of sign language in the memory and recall of deaf persons. (Author/PN)

A quantitative model of speech development is proposed based on observations of normal hearing and congenitally deaf children. Nonlinear controls used during the development of suprasegmental and segmental aspects of speech are identified. Linguistic components of speech are ignored. The importance of the associative cortex in speech-motor control…

The two groups were not significantly different on tests of lipreading and reception of signed English, but the hearing Ss were superior on tests of nonverbal reasoning and perceptual speed. Hearing Ss were greatly superior on a test of verbal reasoning. (Author/DLS)

The relationship between sign and verbal learning was explored using 10 severely mentally retarded adults. They were taught color labels in sign, verbal, or sign and verbal groups. Sign labels tended to be learned more efficiently; combined sign and verbal training improved verbal learning but not sign learning. (Author/CM)