An ACT-R Stroop model

[Erik M. Altmann]

In answer to the interest a few weeks ago; manuscript and model at 
http:/www.msu.edu/~ema/stroop.  Comments most welcome.

Erik.

An Integrative Approach to Stroop: Combining a Language Model and a 
Unified Cognitive Theory

Erik M. Altmann and Douglas J. Davidson

The rich empirical puzzle of the Stroop effect has traditionally been 
approached with narrowly focused and somewhat atheoretical models. A 
recent exception is a simulation model based on the WEAVER++ language 
theory. The present model, WACT, combines components of WEAVER++ with 
the memory and control processes of the ACT-R cognitive theory. WACT 
accounts for the time course of inhibition from incongruent word 
distractors, facilitation from congruent word distractors, the lack 
of effect of color distractors, and the semantic gradient in 
inhibition. WACT goes beyond WEAVER++ to account for Stroop 
performance errors as well latencies, and, being grounded in a 
unified cognitive theory, opens doors to broader coverage of Stroop 
phenomena than standalone models are likely to attain.

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Erik M. Altmann
Department of Psychology
Michigan State University
East Lansing, MI  48824
517-353-4406 (voice)
517-353-1652 (fax)
ema at msu.edu
http://www.msu.edu/~ema
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