Figure 1
We first fitted the data to a GRT model, with TOT or FOK as one dimension of interest and post-decision confidence evaluation of memory recognition as the second dimension of interest (a). Each ellipse in this figure represents a stimulus category (correct and incorrect name conditions as well as catch trials). Using the estimated parameters of the fitted models, we constructed a different type-2 SvM curve, which represents the influence of TOT or FOK on confidence sensitivity (b).
Figure 2
Experiment 1 results. The figures in the left column depict the estimated GRT models for each metacognitive judgment (TOT and FOK), and the figures in the right column depict estimated type-2 SvM curves. In all of the type-2 SvM curve graphs, the red line is the type-2 SvM curve extracted from the GRT model, and the lighter red bands represent the 99 percent confidence interval. The vertical blue line is the objective criterion based on the optimal observer in the GRT model, and the vertical green lines are the individual criterion of participants.
Figure 3
Experiment 2 results. The figures in the left column depict the estimated GRT models for each metacognitive judgment (TOT and FOK), and the figures in the right column depict estimated type-2 SvM curves. In all of the type-2 SvM curve graphs, the red line is the type-2 SvM curve extracted from the GRT model, and the lighter red bands represent the 99 percent confidence interval. The vertical blue line is the objective criterion based on the optimal observer in the GRT model, and the vertical green lines are the individual criterion of participants.