Analysis of a Model for Source Monitoring
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This paper extends and analyzes the Batchelder and Riefer (1990, Psychological Review) model for source monitoring. Source monitoring is a popular memory paradigm in which subjects study items from several different sources and later are tested for their ability to recognize the source of each item. The extended model is identifiable, it can handle an arbitrary number of sources, and it enables one to disentangle response bias factors from memory capacities. The model is used to determine the causes of the “picture superiority effect”, where items presented as pictures perform better on source monitoring than items presented as printed words. We analyze a new experiment that shows that the picture superiority effect is due to memory capacity factors rather than response bias factors.
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