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Accumulating Advantages: A New Conceptualization of Rapid Multiple Choice

van Ravenzwaaij, D, Brown, SD, Marley, AAJ and Heathcote, A ORCID: 0000-0003-4324-5537 2020 , 'Accumulating Advantages: A New Conceptualization of Rapid Multiple Choice' , Psychological Review, vol. 127, no. 2 , pp. 186-215 , doi: 10.1037/rev0000166.

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Independent racing evidence-accumulator models have proven fruitful in advancingunderstanding of rapid decisions, mainly in the case of binary choice, where theycan be relatively easily estimated and are known to account for a range of benchmarkphenomena. Typically, such models assume a one-to-one mapping betweenaccumulators and responses. We explore an alternative independent-race frameworkwhere more than one accumulator can be associated with each response, andwhere a response is triggered when a sufficient number of accumulators associatedwith that response reach their thresholds. Each accumulator is primarily driven bythe difference in evidence supporting one vs. another response (i.e., that response’s“advantage”), with secondary inputs corresponding to the total evidence for bothresponses and a constant term. We use Brown and Heathcote’s (2008) LBA toinstantiate the framework in a mathematically tractable measurement model (i.e.,a model whose parameters can be successfully recovered from data). We showthis “Advantage LBA” model provides a detailed quantitative account of a varietyof benchmark binary and multiple choice phenomena that traditional independentaccumulator models struggle with; in binary choice the effects of additive versusmultiplicative changes to input values, and in multiple choice the effects of manipulationsof the strength of lure (i.e., non-target) stimuli and Hick’s Law. We concludethat the Advantage LBA provides a tractable new avenue for understanding the dynamicsof decisions among multiple choices.

Item Type: Article
Authors/Creators:van Ravenzwaaij, D and Brown, SD and Marley, AAJ and Heathcote, A
Keywords: evidence accumulation models, RT tasks, Hick’s Law, lateral inhibition, max-next
Journal or Publication Title: Psychological Review
Publisher: Amer Psychological Assoc
ISSN: 0033-295X
DOI / ID Number: 10.1037/rev0000166
Copyright Information:

Copyright 2019 American Psychological Association

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