Figure 1.

Motion detection task. (A) Full-screen screenshots of the campimetric motion detection perceptual task. Each response was followed by a 500 ms fixation screen, before the test screen with background and quadrant-specific stimulus were presented for 200 ms (see text for stimulus and background details). Following this, subjects had unlimited time to select one quadrant via a four-button keypad. Arrows signify coherent movement of 5 acrmin diameter monochromatic dots. (B) Inset: close-up of test screen.