The Köhler Group Motivation Gain: How to Motivate the 'Weak Links' in a Group.

A recurring question of successful group work is how to maintain high task motivation of the individual members. This paper reviews research on one well documented group motivation gain phenomenon, where group members are more highly motivated than comparable individual performers - the Köhler motivation gain effect. The basic effect is attributed to two psychological mechanisms, one involving upward social comparisons and a second involving the indispensability of group members' efforts. In addition to summarizing research on the discovery and causes of the basic effect, this review identifies probable moderators of each contributing causal mechanism. Moreover, promising topics for future research as well as implications for the application of the Köhler effect in real group work are discussed. [ABSTRACT FROM AUTHOR]