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. Author manuscript; available in PMC: 2009 Aug 1.
Published in final edited form as: J Mem Lang. 2008 Aug;59(2):169–182. doi: 10.1016/j.jml.2008.04.003

Figure 2.

Figure 2

Illustration of the univariate signal detection model of recognition confidence and Remember-Know (RK) judgments. Panel A shows labels for each model parameter, and Panel B shows the response regions defined by the criteria. Regarding the parameters, µ is the mean of the target evidence distribution, σT is the standard deviation of the target evidence distribution, λC1–3 are criteria for the confidence ratings, λRK is the criterion for the RK judgment, σC is the across-trial standard deviation in the positions of the confidence criteria, and σRK is the across-trial standard deviation in the position of the RK criterion. Although the RK criterion is shown in the region for a “4” response on the confidence scale, the trial-to-trial variability in criteria means that the RK criterion will sometimes fall in the region for a “3” response.