Unconscious acquisition of complex procedural knowledge.

Abstract

This research demonstrates a process of acquisition of information about a complex pattern of stimuli and the facilitating influence of this knowledge on subjects' subsequent performance. In two experiments, subjects were exposed for 12 hr to a sequence of frames containing a target, and their task was to search for the target in each frame. The sequence was divided into logical blocks of seven trials each. Locations of the target in the seventh trial of each block were predictable on the basis of the specific sequences of target locations in four out of the previous six trials. Pilot studies and extensive postexperimental interviews indicated that none of the subjects noticed anything even close to the real nature of the manipulation (i.e., the pattern). However, the predicted patterns of latency of their responses to the critical trials indicate that they had, in fact, acquired some intuitive (unconscious) knowledge about how the pattern of prior trials was related to the critical trial. The phenomenon is discussed as a ubiquitous unconscious process involved in the development of both elementary and high-level cognitive skills.

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