Diffusion Theory of Decision Making in Continuous Report.
I present a diffusion model for decision making in continuous report tasks, in which a continuous, circularly distributed, stimulus attribute in working memory is matched to a representation of the attribute in the stimulus display. Memory retrieval is modeled as a 2-dimensional diffusion process wi...
| Publicado en: | Psychological Review Vol. 123; no. 4; pp. 425 - 452 |
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| Formato: | Artículo |
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American Psychological Association
Jul2016
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=116501765&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 116501765 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 0033295X PYV jtl: Psychological Review issn: 0033295X maglogo: N pubinfo: dt: Jul2016 vid: 123 iid: 4 pid: 34 pub: American Psychological Association artinfo: ui: 116501765 10.1037/rev0000023 ppf: 425 ppct: 27 formats: tig: atl: Diffusion Theory of Decision Making in Continuous Report. aug: au: Smith, Philip L. affil: The University of Melbourne su: Decision making Diffusion processes Short-term memory Visual memory Drift diffusion models sug: subj: Decision making Diffusion processes Short-term memory Visual memory Drift diffusion models keyword: continuous report decision making diffusion process short-term memory (STM) working memory continuous report decision making diffusion process short-term memory (STM) working memory ab: I present a diffusion model for decision making in continuous report tasks, in which a continuous, circularly distributed, stimulus attribute in working memory is matched to a representation of the attribute in the stimulus display. Memory retrieval is modeled as a 2-dimensional diffusion process with vector-valued drift on a disk, whose bounding circle represents the decision criterion. The direction and magnitude of the drift vector describe the identity of the stimulus and the quality of its representation in memory, respectively. The point at which the diffusion exits the disk determines the reported value of the attribute and the time to exit the disk determines the decision time. Expressions for the joint distribution of decision times and report outcomes are obtained by means of the Girsanov change-of-measure theorem, which allows the properties of the nonzero-drift diffusion process to be characterized as a function of a Euclidian-distance Bessel process. Predicted report precision is equal to the product of the decision criterion and the drift magnitude and follows a von Mises distribution, in agreement with the treatment of precision in the working memory literature. Trial-to-trial variability in criterion and drift rate leads, respectively, to direct and inverse relationships between report accuracy and decision times, in agreement with, and generalizing, the standard diffusion model of 2-choice decisions. The 2-dimensional model provides a process account of working memory precision and its relationship with the diffusion model, and a new way to investigate the properties of working memory, via the distributions of decision times. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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