“…Investigations with college students reported by Dansereau and his colleagues (e.g., O'Donnell et al, 1986;O'Donnell et al, 1988aO'Donnell et al, , 1988b and by Fantuzzo and his colleagues (e.g., Fantuzzo, Dimeff, & Fox, 1989;Fantuzzo, Riggio, et al, 1989) are a notable exception to the lack of experimental control. These investigations incorporated strong experimental designs, and although they were of short duration, often less than 3 hr, they showed strong effects in favor of collaborative learning.…”