title: A diffusion decision model analysis of evidence variability in the lexical decision task.
abstract: The lexical-decision task is among the most commonly used paradigms in psycholinguistics. In both the signal-detection theory and Diffusion Decision Model (DDM; Ratcliff, Gomez, & McKoon, Psychological Review, 111, 159-182, 2004) frameworks, lexical-decisions are based on a continuous source of word-likeness evidence for both words and non-words. The Retrieving Effectively from Memory model of Lexical-Decision (REM-LD; Wagenmakers et al., Cognitive Psychology, 48(3), 332-367, 2004) provides a comprehensive explanation of lexical-decision data and makes the prediction that word-likeness evidence is more variable for words than non-words and that higher frequency words are more variable than lower frequency words. To test these predictions, we analyzed five lexical-decision data sets with the DDM. For all data sets, drift-rate variability changed across word frequency and non-word conditions. For the most part, REM-LD's predictions about the ordering of evidence variability across stimuli in the lexical-decision task were confirmed.
authors.affiliation: School of Psychology, University of Newcastle, Callaghan, NSW, 2308, Australia. gabriel.tillman@newcastle.edu.au.
authors.forename: Gabriel
authors.initials: G
authors.lastname: Tillman
authors.affiliation: Melbourne School of Psychological Sciences, Melbourne, Australia.
authors.forename: Adam F
authors.initials: AF
authors.lastname: Osth
authors.affiliation: School of Psychology, University of Newcastle, Callaghan, NSW, 2308, Australia.|Faculty of Behavioural and Social Sciences, University of Groningen, Groningen, Netherlands.
authors.forename: Don
authors.initials: D
authors.lastname: van Ravenzwaaij
authors.affiliation: School of Psychology, University of Newcastle, Callaghan, NSW, 2308, Australia.|School of Medicine, University of Tasmania, Hobart, Australia.
authors.forename: Andrew
authors.initials: A
authors.lastname: Heathcote
mesh_terms: D003657:Decision Making; D003661:Decision Support Techniques; D006801:Humans; D008568:Memory; D008960:Models, Psychological; D011578:Psycholinguistics; D011932:Reading
keywords: Diffusion decision model; Lexical-decision task; REM-LD