ABSTRACT
A particular emplacement on a battlefield has been undergoing prolonged artillery bombardment. High-explosive shells are landing in its vicinity, each heralded by a familiar whine of a duration sufficient for the men to take cover if they so choose. For purposes of exposition, should like to begin discussion of how people proceed in probabilistic categorization with the extreme situation in which the attributes offer a minimum of possible cues in distinguishing categorially between one event and another and in which the consequences of correct and incorrect categorizations are slight and relatively equal. In terms of performance over the series of decisions, there is no difference between the results obtained in the "multi-attribute" and the "eueless" situations. In both, event-matching behavior prevails. But there is an important difference between the two situations in the way in which subjects proceed in categorizing individual instances.
