Brockner, J., & Swap, W. C. (1976). Effects of repeated exposure and attitudinal similarity on self-disclosure and interpersonal attraction. Journal of Personality and Social Psychology, 33(5), 531–540. https://doi.org/10.1037/0022-3514.33.5.531

An experimental study investigated the importance and generalizability of repeated exposure in causing enhanced interpersonal attraction with a sample of 64 females on a college campus. Each participant encountered four other participants, all perceived to be either attitudinally similar or dissimilar, in frequencies of 1, 2, 4, and 8. Results showed that participants were more attracted to partners who were similar to them. However, both group and individual data revealed a tendency for the most frequently observed others to be assessed more favorably on a variety of dependent variables. Authors also reported that in the same condition, the “exposure effect” was marginally, but not considerably, more evident. The idea that frequent exposure boosted attraction was also supported by correlation evidence.