Figure 2
Behavioral results of experiment 1. (a) Results of phase 1 and correct response rate of phase 2. Bars represent the number of trials performed to complete a step that was presented for the first time during phase 1. Dashed lines indicate the minimum number of trials required to reach the next step. (b) Learning curves for both monkeys. The curves show the percentage of correct choices for each session during phase 2 (44 sessions for monkey L and 31 for monkey N). The thick lines represent the 10 consecutive sessions in which the monkeys reached a correct response rate of above 70% (where a correct response rate of 50% corresponds to chance). (c) Working blocks. Each row represents a session during phase 2. Colored lines indicate working blocks, which comprise completed trials (see “Experimental procedures” section). The color bar indicates the correct response rate calculated for each working block. Black lines indicate the non-interactive blocks, which comprise trials in which the monkeys did not interact with the touchscreen. The white area indicates the end of the sessions. (d) Stability of interaction within phase 2 sessions. The curves indicate the mean percentage of complete trials (see experimental procedures) calculated using a moving window of 100 trials in sessions in which the learning criterion was achieved and which included at least 800 trials. Color-shaded regions represent the standard error of the mean. (e) Stability of performance within phase 2 sessions. Correct response rate for sessions in which the learning criterion was achieved and which included at least 800 trials. The sessions are split into two halves: first half (FH) and second half (SH). The central line represents the median and the top and bottom borders of each box represent the 25th (p25) and 75th (p75) percentiles of the two groups of trials. The whiskers represent the range from 1.5 times the interquartile range above p75 (p75 + 1.5 [p75 − p25]) and below p25 (p25 − 1.5 [p75 − p25]). Data points outside this range are plotted individually (red crosses). The dashed line indicates 50%, the level associated with responses dictated by chance alone.
