Adult Attachment Theory
http://internal.psychology.illinois.edu/~rcfraley/attachment.htm
The idea that romantic relationships may be attachment relationships has had a profound influence on modern research on close relationships. There are at least three critical implications of this idea. First, if adult romantic relationships are attachment relationships, then we should observe the same kinds of individual differences in adult relationships that Ainsworth observed in infant-caregiver relationships. We may expect some adults, for example, to be
secure in their relationships--to feel confident that their partners will be there for them when needed, and open to depending on others and having others depend on them. We should expect other adults, in contrast, to be insecure in their relationships. For example, some insecure adults may be
anxious-resistant: they worry that others may not love them completely, and be easily frustrated or angered when their attachment needs go unmet. Others may be
avoidant: they may appear not to care too much about close relationships, and may prefer not to be too dependent upon other people or to have others be too dependent upon them.
Second, if adult romantic relationships are attachment relationships, then the way adult relationships "work" should be similar to the way infant-caregiver relationships work. In other words, the same kinds of factors that facilitate exploration in children (i.e., having a responsive caregiver) should facilitate exploration among adults (i.e., having a responsive partner). The kinds of things that make an attachment figure "desirable" for infants (i.e., responsiveness, availability) are the kinds of factors adults should find desirable in romantic partners. In short, individual differences in attachment should influence relational and personal functioning in adulthood in the same way they do in childhood.
Third, whether an adult is secure or insecure in his or her adult relationships may be a partial reflection of his or her experiences with his or her primary caregivers. Bowlby believed that the mental representations or working models (i.e., expectations, beliefs, "rules" or "scripts" for behaving and thinking) that a child holds regarding relationships are a function of his or her caregiving experiences. For example, a secure child tends to believe that others will be there for him or her because previous experiences have led him or her to this conclusion. Once a child has developed such expectations, he or she will tend to seek out relational experiences that are consistent with those expectations and perceive others in a way that is colored by those beliefs. According to Bowlby, this kind of process should promote continuity in attachment patterns over the life course, although it is possible that a person's attachment pattern will change if his or her relational experiences are inconsistent with his or her expectations. In short, if we assume that adult relationships are attachment relationships, it is possible that children who are secure as children will grow up to be secure in their romantic relationships. Or, relatedly, that people who are secure as adults in their relationships with their parents will be more likely to forge secure relationships with new partners.