Accurate First Impressions Leave a Lasting Impression: The Long-Term Effects of Distinctive Self-Other Agreement on Relationship Development

Above and beyond the benefits of biases such as positivity and assumed similarity, does the accuracy of our first impressions have immediate and long-term effects on relationship development? Assessing accuracy as distinctive self-other agreement, we found that more accurate personality impressions of new classmates were marginally associated with greater liking concurrently, and significantly predicted greater interaction throughout the semester and greater liking and interest in future interactions by the end of the semester. Importantly, greater distinctive self-other agreement continued to promote social interaction even after controlling for Time 1 liking, suggesting that these positive effects of accuracy operate independently of initial liking. Forming positively biased first impressions was a strong predictor of both initial and longer term relationship development, while assumed similarity showed strong initial but not long-term associations. In sum, independent of the benefits of biased impressions, forming accurate impressions has a positive impact on relationship development among new acquaintances.