File:Binocular rivalry Experiment.png

English: Experimental design. (A) Binocular rivalry setup. Red and blue grating stimuli were presented to the left and right eye separately using a mirror stereoscope. As a consequence, conscious visual perception alternated spontaneously between the two stimuli. (B) Target stimuli (here indicated as small black squares) were presented alternatingly superimposed on the two grating stimuli in four possible positions and had to be reported by the participant using key presses. Targets on the currently dominant stimulus were clearly visible whereas those on the currently suppressed stimulus were invisible. Correct responses to a target, i.e., correct identification of the target position (here indicated by a yellow circle), was therefore used to indirectly assess the current conscious perception of the participant.