Learning in Groups: Possible Advantages of Working in Threes

This study investigated how interacting in different size discussion groups can improve students' understanding of research methods topics at the university level. Students completed a discussion activity in groups of twos, threes, and fours, and later were tested individually for their understanding of the target concepts. While the largest group size (fours) performed best on the worksheet that was completed in groups as part of the discussion activity, working in a group of three appeared to support better understanding of the target concepts for weaker students in the course. Several alternative explanations for the benefit from working in threes are considered.