Fig. 3: Passive visual experiment: experimental design and results.

Experiment 4. a In contrast to auditory experiment 1, sequences of visual gratings were presented on each trial. Participants performed a beat discrimination task by deciding whether the last grating of the sequence, a colour deviant (blue vs. yellow), was on or off beat. The beat frequency varied across conditions (from 0.3 Hz to 3.8 Hz) b Comparison of the individual difficulty levels obtained during the staircase procedures (with a 2 Hz tempo) of the auditory (exp. 1) and visual (exp. 4) experiments. c Average performance per condition. Same conventions as in Fig. 1c. d Comparison of individual estimates of the optimal tempo, between auditory (exp. 1) and visual (exp. 4) experiments. Error bars indicate s.e.m. (n = 30; unpaired t-tests; *p < 0.05). Boxplots represent median and 1.5 times the interquartile range.