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Abstract A basic premise of attachment theory is that internal models of attachment remain relatively stable across the life span. We examined stability and change in adult attachment representations over 8 months in a sample of young adults (N = 144; Mean age = 24.5 years). Attachment patterns were assessed by categorical and continuous ratings across three methods—self‐report ratings, expert ratings based on semi‐structured interviews, and reports of romantic partners—and showed moderate stability. Interview ratings tended to show higher stability than self‐report ratings. Changes in attachment ratings (across methods) were not consistently related to life events that had occurred in the intervening 8 months. The relationship between reliability and stability was discussed, and where the “true” stability could be estimated independent of unreliability, it was found to be very high ( r's ranging from .72 to .96). The results highlight the importance of using multiple indicators in assessing adult attachment and using continuous rather than categorical ratings in the assessment of stability.
Scharfe et al. (Tue,) studied this question.