UC Merced Proceedings of the Annual Meeting of the Cognitive Science Society Title ANCHOR: A Memory-Based Model of Category Rating Permalink Publication Date ANCHOR: A Memory-Based Model of Category Rating

Alexander Petrov, John Anderson, Alexander Petrov, John Anderson
2000 Proceedings of the Annual Meeting of the Cognitive Science Society   unpublished
This paper attempts to draw a bridge between psychophys-ics and memory research by proposing a memory-based model of category rating. The model is based on the cogni-tive architecture ACT-R and uses anchors stored in memory that serve as prototypes for the stimuli classified within a response category. The anchors are retrieved by a partial matching mechanism and updated dynamically by an in-cremental learning mechanism. Anchors also have base-level activations that reflect the frequency and
more » ... he frequency and recency of the responses. These mechanisms give rise to sequential effects and nonuniform response distributions. A psychological experiment involving category rating of physical length is reported and the predictions of the model are compared against the empirical data. The psychophysical implications of the model are discussed.
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