Perhaps the most provocative and controversial implication of adult attachment theory is that a person´s attachment style as an adult is shaped by his or her interactions with parental attachment figures. Although the idea that early attachment experiences might have an influence on attachment style in romantic relationships is relatively uncontroversial, hypotheses about the source and degree of overlap between the two kinds of attachment orientations have been controversial.
There are at least two issues involved in considering the question of stability: (a) How much similarity is there between the security people experience with different people in their lives (e.g., mothers, fathers, romantic partners)? and (b) With respect to any one of these relationships, how stable is security over time?
With respect to this first issue, it appears that there is a modest degree of overlap between how secure people feel with their mothers, for example, and how secure they feel with their romantic partners. Fraley, for example, collected self-report measures of one´s current attachment style with a significant parental figure and a current romantic partner and found correlations ranging between approximately .20 to .50 (i.e., small to moderate) between the two kinds of attachment relationships.
With respect to the second issue, the stability of one´s attachment to one´s parents appears to be equal to a correlation of about .25 to .39 (Fraley, 2002). There is only one longitudinal study of which we are aware that assessed the link between security at age 1 in the strange situation and security of the same people 20 years later in their adult romantic relationships. This unpublished study uncovered a correlation of .17 between these two variables (Steele, Waters, Crowell, & Treboux, 1998).
The association between early attachment experiences and adult attachment styles has also been examined in retrospective studies. Hazan and Shaver (1987) found that adults who were secure in their romantic relationships were more likely to recall their childhood relationships with parents as being affectionate, caring, and accepting (see also Feeney & Noller, 1990).
Based on these kinds of studies, it seems likely that attachment styles in the child-parent domain and attachment styles in the romantic relationship domain are only moderately related at best. What are the implications of such findings for adult attachment theory? According to some writers, the most important proposition of the theory is that the attachment system, a system originally adapted for the ecology of infancy, continues to influence behavior, thought, and feeling in adulthood (see Fraley & Shaver, 2000). This proposition may hold regardless of whether individual differences in the way the system is organized remain stable over a decade or more, and stable across different kinds of intimate relationships.
Although the social and cognitive mechanisms invoked by attachment theorists imply that stability in attachment style may be the rule rather than the exception, these basic mechanisms can predict either long-run continuity or discontinuity, depending on the precise ways in which they are conceptualized (Fraley, 2002). Fraley (2002) discussed two models of continuity derived from attachment theory that make different predictions about long-term continuity even though they were derived from the same basic theoretical principles. Each model assumes that individual differences in attachment representations are shaped by variation in experiences with caregivers in early childhood, and that, in turn, these early representations shape the quality of the individual´s subsequent attachment experiences. However, one model assumes that existing representations are updated and revised in light of new experiences such that older representations are eventually “overwritten.” Mathematical analyses revealed that this model predicts that the long-term stability of individual differences will approach zero. The second model is similar to the first, but makes the additional assumption that representational models developed in the first year of life are preserved (i.e., they are not overwritten) and continue to influence relational behavior throughout the life course. Analyses of this model revealed that long-term stability can approach a non-zero limiting value. The important point here is that the principles of attachment theory can be used to derive developmental models that make strikingly different predictions about the long-term stability of individual differences. In light of this finding, the existence of long-term stability of individual differences should be considered an empirical question rather than an assumption of the theory.
