LAUSR

Abstract We tested an easy-to-implement, theoretically-grounded Buddy Up intervention designed to help preschoolers engage with diverse peers. Using naturalistic observation procedures, independent observers coded children’s (N = 137) peer experiences in preschool classrooms. Findings revealed an intervention effect on time spent with peers for boys only, such that boys in the intervention condition maintained their engagement with peers whereas boys in the control condition declined in social play over time. Moreover, for both boys and girls, participation in Buddy Up appeared to increase their play with peers with whom they had not previously played and mitigate declines in play with other-gender peers. These effects did not occur at the expense of playing with same-gender peers. Findings speak to the potential of a Buddy Up intervention for building inclusive classroom peer relationships and support a novel application of Intergroup Contact Theory in promoting gender-inclusive relationships.