This study investigated variables that might be associated with outcome differences in language development of 10 children (ages 10-20 months) with blindness or severe visual impairments, attending a developmental vision clinic in southern England. Subjects' early patterns of expressive language development were examined and related to observed…

The significance of three mothers' speech for their infants' language development is considered in a continuing longitudinal study. The study began when the children (two females and one male) were 5 and 6 months of age and will continue until the subjects are 3 years old. In the speech data reported the children were from 6 to 18 months of age.…

The development of the Conversational Unit (CU) was investigated in a semilongitudinal study of three mother/son dyads in nonstructured spontaneous communication. The children were 19 to 23 months old at the start of the investigation. Sound films were recorded monthly during bathing and feeding times. After four months, verbal and nonverbal…