A tutorial on General Recognition Theory

Abstract General Recognition Theory (GRT; e.g., Ashby and Townsend, 1986, inter alia) is a two-stage, multidimensional model of encoding and response selection. In this tutorial, we present the basic conceptual and mathematical structure of GRT and review the three notions of dimensional interaction defined in the GRT framework: perceptual independence, perceptual separability, and decisional separability. Experimental protocols and data closely linked to the GRT model are discussed, and two sets of empirical tests of dimensional interaction are presented. These test procedures are illustrated via functions the new R package mdsdt .

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