Data for Figure 8 of the manuscript. Data are organized into 10 rows and 30 columns. Each column comprises 10 repeated measures. Columns 1 to 6 are for contrast = 20%, flicker frequency = 0.94 ... 30 Hz. Columns 7 to 12 are for contrast = 40%, flicker frequency = 0.94 ... 30 Hz. And so on. Data are normalized as described in the manuscript.