This may seem a rather restricted definition of cohesiveness. Back (l), however, has demonstrated that cohesiveness, no matter what its source, can be considered a unitary concept. Whether cohesiveness i s based on friendship, the valence of the activily mediated by the group, or group prestige, the consequences of increasing cohesiveness are identical.' To check on whether or not jobs on these committees actually did vary in attractiveness, in several of the groups the members were asked to write their own names next to those committees in which they were most interested, Most requested the Executive Committee, a few the Steering, and none the Correspondence Committee.
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