“…Much of this work is driven by the theoretical literature on normal language development, and emphasizes adult interaction styles that are most facilitative of communicative development. Frequently mentioned characteristics of such developmentally enhancing interaction styles include balanced turntaking (Girolametto, 1988;MacDonald & Gillette, 1984Mahoney, 1988b), progressively matched turntaking (MacDonald & Gillette, 1988), interactional match (Mahoney, 1988b), contingent responding, being animated, and waiting long enough to give the child a chance to respond (MacDonald & Gillette, 1988). The development of language and communication skills is a central concern in many intervention programmes for mentally handicapped children; consequently, the conversational approach to language intervention, with its emphasis on parent-child interaction, has had significant appeal among early interventionists in the field of mental retardation (e.g.…”