Results of Experiment 1 (left) and Experiment 2 (right) as a function of four epochs with 25 trials each. The top plots show the determined individual p_2AFC values in each epoch as points (horizontal offset for better readability). Individual data points are connected with gray lines. The boxes show the mean (box notch) and the 95% between-subject CI for each epoch. The gray dashed line denotes 50% chance level. The bottom plots show the interindividual variation in the determined p_2AFC values for each epoch in the form of a box plot with the median (box line), the mean (cross), and the (across participants) interquartile range (IQR); whiskers display 1.5 × IQR below the 25th or above the 75th percentile and outliers beyond that range are indicated by asterisks.