Human mate poaching, behavior intended to attract someone already in a romantic relationship, is viewed as evolutionarily adaptive given the restrictions on the availability of exclusive mates. Previous research (Schmitt & Buss, 2001) found that poaching is a common mating strategy and that the psychological characteristics of mate poachers are different from those of people who engage in general romantic attraction.
One category of individual difference variables not previously included in the study of mate poaching is the one deriving from attachment theory. Individual differences on the dimensions of attachment-related anxiety and avoidance predict differences in the ways people experience romantic and sexual relationships. People who are securely attached (low on anxiety and avoidance) have stable, satisfying relationships. Those who are predominantly anxious become obsessed with their partners and experience low relationship satisfaction. Predominantly avoidant individuals are less interested in relationships, especially long-term committed ones, and have more accepting attitudes toward casual sex.
Based on the different mating and relating patterns exhibited by people with different attachment styles, we predicted corresponding differences in mate poaching tendencies and experiences: 1) In the context of short-term relationships, people high in avoidance will be particularly likely to make and respond favorably to poaching attempts, because they tend to engage in casual sex and avoid commitment to long-term relationships. 2) People high in anxiety will be especially concerned about poaching attempts made on their partners regardless of temporal context, because they worry about abandonment and behave possessively toward their partners.
Participants filled out questionnaires containing a) the Anonymous Romantic Attraction Survey, a measure including questions about participants’ experiences as poachers, poaching attempts made on their partners, and times in which participants were targets of poaching efforts, with all three categories of questions answered with respect to long-term and short-term relationships; b) the Sexy Seven Measure, which assesses 7 sexuality-related attributes such as relationship exclusivity (Schmitt & Buss, 2000); c) the Experiences in Close Relationships scale, which measures attachment-related anxiety and avoidance (Brennan, Clark, & Shaver, 1998); and d) the Big Five Inventory, which assesses 5 general personality traits.
A series of multiple regression analyses predicting the poaching variables from a combination of gender, avoidance, anxiety, the Big Five, and the Sexy Seven supported both of our hypotheses. People high in avoidance were more likely than those low in avoidance to make and respond favorably to poaching attempts in the context of short-term relationships, but not long-term relationships. Anxious people tend to think that their partners could be successfully poached for both affairs and long-term relationships, a valid fear considering that anxiety is the sole factor predicting others’ actual success of at poaching one’s partner.
Attachment concepts can make important contributions to the understanding of mate poaching as a reproductive strategy. In particular, our finding that avoidance is negatively correlated with relationship exclusivity, with highly avoidant people likely to make and react favorably to poaching attempts in a short-term context, supports the conceptualization of avoidant attachment as evolutionarily adaptive in situations where quantity of mates and offspring matters more than quality.