Two linguistically deficient children of deaf parents had been cared for almost exclusively by their mother, who did not speak or sign to them. Intervention led to erasure of idiosynchratic speech pattern in the older child and in increasing both children's expressive ability. Implications for language-learning are discussed. (PJM)

This paper describes the linguistic development of two hearing sons of deaf parents. Both were exposed to an early language environment different from that of the average hearing child. At the start of the study, the boys were aged 3 years, 9 months, and 1 year, 8 months, respectively. When first observed, the older child performed well below age…

The question is addressed whether a child would develop a communication system if a conventional linguistic model is absent. Six congenitally deaf children, who were not exposed to Sign Language, were observed and videotaped at play in their homes at intervals of one to three months. The children ranged in age from 1 year, 5 months to 4 years, 1…