Before revision: This pervasive behaviour, however, was the only clue to the extent of her stress".Crittenden, P.M. (1983) 'Mother and Infant Patterns of Attachment' Unpublished PhD Dissertation, University of Virginia, May 1983, p.73 Drawing on records of behaviours discrepant with the A, B, and C classifications, a fourth classification was added by Ainsworth's colleague Mary Main .
After revision: and Judith SolomonThis pervasive behaviour, however, was the only clue to the extent of her stress".Crittenden, P.M. (1983) 'Mother and Infant Patterns of Attachment' Unpublished PhD Dissertation, University of Virginia, May 1983, p.73 Drawing on records of behaviours discrepant with the A, B, and C classifications, a fourth classification was added by Ainsworth's colleague Mary Main .