The performance of a two-man team, each member of which is responsible for one dimension of a two dimensional tracking task, is compared with that of one man performing the whole task. In addition, the effects of knowledge of the partner's performance are investigated for the two man situation. Using time-on-target as a criterion, the results show that (l) the two-man team obtains a score two to three hundred percent better than that obtained by the single man, and (2) knowledge of partner's performance has little or no effect on an individual's performance.
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