1. Patterns of attachment: A psychological study of the Strange Situation;Ainsworth,1978
2. Can early interaction predict? How and how much?;Bakeman,1989
3. Infants' contribution to the achievement of joint reference;Baldwin;Child Development,1991
4. Characteristics of adult speech which predict children's language development;Barnes;Journal of Child Language,1983
5. Individual differences and their implications for theories of language development;Bates,1995