The task presented to individual Ss required identification of a particular set of two digit numbers that was wholly contained in a larger set of displayed elements. Five stimulus factors were experimentally manipulated. Size of the display set, number of presumptive pattern sets, and density of display elements in the incorrect presumptive pattern sets were negatively related to accuracy of identification. The size of the pattern sets and the spatial distribution of pattern elements in the display were not related clearly to performance. The relevance of these studies to pattern identification in small group situtations is discussed and illustrated.
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