Figure 3.

Task performance. A, Performance during the staircasing procedure. Angular deviations were modulated separately for each set size, and detection thresholds were estimated as the angular deviation required to reach 75% detection accuracy. Detection thresholds were significantly lower for set size 1 trials compared with set size 2 trials (p < 0.01). B, Task performance during MRI. Angular deviations for both set sizes were yoked to detection thresholds for set size 1 during the staircasing procedure. Accuracy in reporting the direction of angular deviations was higher for set size 1 than set size 2 (p < 0.01). Error bars represent within-subject confidence intervals.