References: Development
Ainsworth, M. D. S., & Bell, S. M. (1970). Attachment, exploration, and separation: Illustrated by the behavior of one-year-olds in a strange situation. Child Development, 41, 49-67 Ainsworth, M. D. S., Bell, S. M., & Stayton, D. J. (1971) Individual differences in strange-situation behavior of one-year-olds. In H. R. Schaffer (Ed.) The origins of human social relations. London and New York: Academic Press. Pp....