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Status: Bibliographieeintrag

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Verfasst von:Voß, Andreas [VerfasserIn]   i
 Lerche, Veronika [VerfasserIn]   i
 Mertens, Ulf K. [VerfasserIn]   i
 Voß, Jochen [VerfasserIn]   i
Titel:Sequential sampling models with variable boundaries and non-normal noise
Titelzusatz:A comparison of six models
Verf.angabe:Andreas Voss, Veronika Lerche, Ulf Mertens, Jochen Voss
E-Jahr:2019
Jahr:16 January 2019
Umfang:20 S.
Fussnoten:Published online: 16 January 2019 ; Gesehen am 13.02.2020
Titel Quelle:Enthalten in: Psychonomic bulletin & review
Ort Quelle:New York, NY : Springer, 1994
Jahr Quelle:2019
Band/Heft Quelle:26(2019), 3, Seite 813-832
ISSN Quelle:1531-5320
Abstract:One of the most prominent response-time models in cognitive psychology is the diffusion model, which assumes that decision-making is based on a continuous evidence accumulation described by a Wiener diffusion process. In the present paper, we examine two basic assumptions of standard diffusion model analyses. Firstly, we address the question of whether participants adjust their decision thresholds during the decision process. Secondly, we investigate whether so-called Lévy-flights that allow for random jumps in the decision process account better for experimental data than do diffusion models. Specifically, we compare the fit of six different versions of accumulator models to data from four conditions of a number-letter classification task. The experiment comprised a simple single-stimulus task and a more difficult multiple-stimulus task that were both administered under speed versus accuracy conditions. Across the four experimental conditions, we found little evidence for a collapsing of decision boundaries. However, our results suggest that the Lévy-flight model with heavy-tailed noise distributions (i.e., allowing for jumps in the accumulation process) fits data better than the Wiener diffusion model.
DOI:doi:10.3758/s13423-018-1560-4
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext: https://doi.org/10.3758/s13423-018-1560-4
 Verlag: https://doi.org/10.3758/s13423-018-1560-4
 DOI: https://doi.org/10.3758/s13423-018-1560-4
Datenträger:Online-Ressource
Sprache:eng
Sach-SW:Collapsing boundaries
 Decision making
 Diffusion model
 Lévy flight model
K10plus-PPN:1689980575
Verknüpfungen:→ Zeitschrift

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