Group projects are often used in psychology courses to prepare students for future collaborative work. However, psychology alumni report that their education did not adequately prepare them for collaborative work. To better understand these perceptions, this study examined how instructor contributions (involvement and evaluation techniques) promote the benefits of group projects by positively influencing intragroup processes. In this study of current psychology majors, mediation analyses revealed an indirect effect of instructor involvement through goal orientation, as well as the direct effect of instructor evaluation techniques on perceptions of group projects. Moreover, instructor contributions positively predicted group cohesion, communication, goal orientation, and planning. Results suggest ways in which instructors can improve psychology majors' collaborative experiences for experientialevaluation learning.