Newell, B.Dunn, J.Kalish, M.2010-11-112010-11-112010Memory and Cognition, 2010; 38(5):563-5810090-502X1532-5946http://hdl.handle.net/2440/61664State-trace analysis was used to investigate the effect of concurrent working memory load on perceptual category learning. Initial reanalysis of Zeithamova and Maddox (2006, Experiment 1) revealed an apparently two-dimensional state-trace plot consistent with a dual-system interpretation of category learning. However, three modified replications of the original experiment found evidence of a single resource underlying the learning of both rule-based and information integration category structures. Follow-up analyses of the Zeithamova and Maddox data, restricted to only those participants who had learned the category task and performed the concurrent working memory task adequately, revealed a one-dimensional plot consistent with a single-resource interpretation and the results of the three new experiments. The results highlight the potential of state-trace analysis in furthering our understanding of the mechanisms underlying category learning.en© 2010 The Psychonomic SocietyHumansLikelihood FunctionsMonte Carlo MethodProbabilityOrientationDiscrimination LearningMemory, Short-TermSerial LearningPattern Recognition, VisualSpace PerceptionJudgmentAttentionModels, PsychologicalStroop TestJournal article002010106610.3758/MC.38.5.5630002818120000042-s2.0-7795649251033164Dunn, J. [0000-0002-3950-3460]