Figure 3.

Output shown when running “ringach98.m” a, A sample grating that the subject is required to respond to via a “ctrl” key press. b, A heatmap showing the grating orientations for the 10 frames immediately preceding the key press, summed over all of the key presses for the duration of the experiment. After a few minutes, the distribution of orientations that were presented at each key press resembles a 2D Mexican Hat wavelet, centered on the orientation the subject was reporting at the subject’s average reaction time. In this example, the subject was reporting a vertical grating orientation (90°) with an average reaction time of ∼600 ms.