Individual differences in social loafing: Need for cognition as a motivator in collective performance
Group Dynamics Theory Research and Practice (2001) - Comment
doi: 10.1037/1089-2699.5.2.150  issn: 1089-2699  issn: 1930-7802 

Brian N. Smith, Natalie A. Kerr, Michael J. Markus, Mark F. Stasson