"Testing a Poisson counter model for visual identification of briefly presented, mutually confusable single stimuli in pure accuracy tasks": Correction to Kyllingsbæk, Markussen, and Bundesen (2012)

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The article “Testing a Poisson Counter Model for Visual Identification of Briefly Presented, Mutually Confusable Single Stimuli in Pure Accuracy Tasks” by Søren Kyllingsbæk, Bo Markussen and Claus Bundesen (Journal of Experimental Psychology: Human Perception and Performance, 2012, Vol. 38, No. 3, pp. 628–642. http://dx.doi.org/10.1037/a0024751) used a computational shortcut (Equation A5) that strongly reduced the time needed to fit the Poisson counter model to experimental data. Unfortunately, the computational shortcut built on an approximation that was not well-founded in the Poisson counter model. To measure the actual deviation, the authors refitted both the computational shortcut and the Poisson counter model (Equations A1-A4) to the experimental data reported in the article. The Poisson counter model fits did, fortunately, not deviate noticeably from those produced by the computational shortcut, nor did they invalidate any conclusions derived. The authors, however, still recommend that the Poisson counter model or a well-founded computational shortcut should be used in a fitting routine.

A more detailed description of this correction that shows why the computational shortcut is not well-founded, and reports the refits, as well as a proposal for a well-founded computational shortcut can be found at http://dx.doi.org/10.1037/xhp0000037.supp

We are grateful to Carsten S. Nielsen for bringing this point to our attention and for working with the authors of this article to prepare the supplementary material that supports our new understanding. Please direct any questions regarding this material to Carsten S. Nielsen, Department of Psychology, University of Copenhagen, Øster Farimagsgade 2A, DK-1353, Copenhagen K, Denmark, E-mail: carsten.nielsen@psy.ku.dk
TidsskriftJournal of Experimental Psychology: Human Perception and Performance
Udgave nummer2
Sider (fra-til)355
Antal sider1
StatusUdgivet - 2015

ID: 136027648