Media type: E-Article Title: Two, three, or four heads are better than one: Modification of college performance by peer monitoring Contributor: Fraser, Scott C.; Diener, Edward; Beaman, Arthur L.; Kelem, Roger T. imprint: American Psychological Association (APA), 1977 Published in: Journal of Educational Psychology Language: English DOI: 10.1037//0022-0663.69.2.101 ISSN: 0022-0663 Origination: Footnote: