Process of Communication Stages 1 - 6 within Level 1 (including Programmes of Study & Attainment Target 1)
As in Stage I and: Brinker, R. P. and Lewis, M. (1982) Discovering the competent handicapped infant: a process approach to assessment and intervention. Topics in Early Childhood Special Education, 2 1-16
Jaffe, J. Stern, D. and Peery, J. (1987) Conversational coupling of gaze behaviour in prelinguistic human development. Journal of Psycholinguistic Research, 2, 321-9.