Key points are not available for this paper at this time.
Patrick T. Terenzini, Alberto F. Cabrera, Carol L. Colbeck, Stefani A. Bjorklund, John M. Parente, Racial and Ethnic Diversity in the Classroom: Does It Promote Student Learning?, The Journal of Higher Education, Vol. 72, No. 5 (Sep. - Oct., 2001), pp. 509-531
Terenzini et al. (Sat,) studied this question.