The study compared comprehension of American Sign Language (ASL) between 12 deaf subjects in a program using Signing Exact English (SEE-2) and 14 deaf subjects in a residential program using Signed English, Pidgin Signed English, and ASL. Students exposed to SEE-2 could comprehend ASL as well as residential school peers. (Author/DB)

Reports an 18-month longitudinal study of sign language acquisition in very young children of deaf parents. Results indicate that some revision of views on cognitive prerequisites for language is necessary. Implications for nonspeaking populations and for developmental theory are discussed. Reviews briefly sign language training programs for…

Notes that three papers and commentary (in this issue) emphasized importance of including data on manual modality when studying language development and its relationship to other domains. Discusses advantages of using robustness analysis rather than precursor relations to study domain relations. Suggests alternative theoretical context to which…

Uses data from Toddler Sign Program, a nine-month program of bimodal input and assessment involving 25 handicapped and nonhandicapped toddlers (11 to 33 months old at program onset). Explores boundary conditions (most extreme conditions under which a phenomenon holds) of sign advantage phenomenon (where signs are learned earlier and more easily…

Introduces three papers (published in this issue) contrasting the development of gestures and sign language with spoken language in order to specify the nature of language plasticity (susceptibility to change) and robustness (invariance). Focuses on question of whether these are parallel systems or an integrated system with two forms of…

The gesture systems developed by 10 deaf children, each incapable of acquiring a conventional spoken language naturally and not exposed to a conventional manual language by their hearing parents, were compared and contrasted to both the speech and the gesture systems developed by three hearing children learning English. (Author/BE)

This study examined the possible sources of variability in sign language mastery in two deaf children of hearing parents. The study considered the interaction of environmental and innate factors within the framework of the "Nativization" hypothesis, which suggests that all language learners initially construct a linguistic system which…

Describes the spontaneous development of 13 symbolic gestures in a normal infant from 12 to 17 months. Sixteen additional symbolic gestures were purposefully taught. Vocal development was advanced, indicating that gesturing is not necessarily related to poor vocal skills. Data support the hypothesis that sensorimotor behaviors are natural…

Reports that four deaf children of hearing parents, who lacked usable conventional linguistic input, developed a gestural communication system that showed some of the structural regularities characteristic of early child language. Suggests that communication with a number of language-like properties can develop in an atypical language-learning…

Novel word learning in three conditions (signed only, spoken only, signed and spoken combined) was compared for young children (N=10) with Down syndrome and mental-age matched controls. No group differences in frequency of imitations or productions were obtained. The frequency of imitations was highest in the combined condition. In the combined…

A six-year-old nonvocal girl with autism who had acquired a variety of signs and imitative responses consistently failed to acquire a tact (labeling) repertoire. When procedures to transfer stimulus control from verbal to nonverbal stimuli were implemented, the subject quickly learned to tact all 18 target stimuli. (Author/DB)

Two studies explored linguistic development in sign and speech of 10 youth (ages 12-16) with severe intellectual impairments who used manual signs (Makaton vocabulary) for communication. Analysis of semantic relations, lexical development, and word order suggested the children's language had not developed beyond mean length of utterance stage 1.…

The ability to attribute false beliefs by 155 deaf children (ages 5 and 8) grouped by communication mode and parental hearing status was compared to that of 39 hearing children (ages 4 to 6). Effective representational abilities were demonstrated by deaf children of deaf parents, whereas those with hearing parents appeared delayed, with…

This study compared American Sign Language (ASL) abilities in 36 deaf adults who acquired ASL either in early childhood or in later childhood and who were born deaf or later lost their hearing. Subjects who acquired ASL as a second language after early childhood outperformed those who acquired it as a first language at the same age. (Author/DB)

This longitudinal study looked at how communication developed in seven deaf infants (ages 6-18 months) with either deaf or hearing parents. The children were video- recorded in interactional settings with their parents in their home every second month. A parallel study was conducted with seven blind infants and three severely visually impaired…