Configural effects in human memory: The superiority of memory over external information sources as a basis for inference verification

The ability to integrate information from diverse texts and to detect logical implications of the integrated information is fundamental to the understanding process. This paper shows that identifying and configuring relevant facts in order to support hypothesized inferences is extremely difficult unless the facts have been committed to memory. Simply reading relevant texts for familiarization and then referring to them as needed provides an inadequate basis for deductive logic. Further, apprehension of the logical configuration of facts underlying a particular inference can be an essentially automatic process for the reasoner who has structured the facts appropriately in memory. A model of search and memory mechanisms is proposed. It accounts for accuracy and reaction time data, as well as individual differences in inference evaluation. The implications of the superiority of memorization over familiarization-plus-referencing as a basis for learning and reasoning are discussed.