The study involving two visually impaired developmentally delayed infants, investigated the role of child/adult interaction in eliciting intentional (goal-directed) communicative behavior. It was hypothesized that child/adult interaction would increase the child's awareness of how his or her actions influence adult behavior and would lead the…

The manual development of 148 blind, visually impaired, and visually impaired multi-handicapped students, aged 3-19, was studied. Results indicated a significant relationship between object manipulation and speech, and an inverse relationship between object manipulation and stereotypic hand mannerisms. Optimal development of manual functions and…