Lay Theories of Instrumental Relations: Explaining Individual Differences in Dispositional Similarity-Attraction

The growing diversity in today's workplace requires engaging with people who not only look different but also think different. Yet, research on workplace relations has treated similarity-attraction as a human universal and paid limited attention to individual differences in who respects or tolerates different views and values, and why. We address this gap by examining how lay theories people hold about instrumental relations affect dispositional similarity-attraction. Because people who hold a fixed (versus growth) theory of instrumental relations believe that relationships form primarily on the basis of natural compatibility (versus effort), they should be particularly prone to similarity-attraction on the basis of dispositional similarity in values, attitudes, and personality traits. To test our arguments, we first develop a lay theories of instrumental relations scale, which we use to demonstrate that holding a growth theory decreases (moderates) people's tendency to avoid dispositionally dissimilar partners in a naturally occurring network (Field Study) and a dyadic task (Experiment 1). Finally (Experiment 2), we manipulate lay theories to show that inducing growth theories increases people's satisfaction with a task partner who is dispositionally dissimilar. We conclude by discussing theoretical and practical implications for building diverse yet cohesive workplaces.