In this experiment, you will see two flashes of light presented on the screen. The flashes will be different colors and appear at different locations. Your task is to report whether you perceived two separate, alternating flashes, or a single stimulus moving smoothly while changing color.
Pick a familiar object, hold it gently against the screen, and resize the on-screen shape so it matches. This lets us convert every pixel on your display into degrees of visual angle.
Calibration required before the experiment can begin.