Effects of orientation and spatial frequency on monocular and binocular rivalry

When different images are presented to the two eyes, binocular rivalry occurs, that is, the images alternate in visibility. When different images are presented to the same eye, monocular rivalry occurs, that is, the images also alternate in visibility. I report two experiments comparing the effects of differences in orientation and spatial frequency of the two images on monocular and binocular rivalry. As orientation or spatial frequency difference between the two images increases, so does the rivalry rate, although monocular rivalry rates are less than binocular rivalry rates. The similarity between the two phenomena suggests that binocular rivalry may consist of two components, alternations between two images that are independent of eye of origin (as revealed by monocular rivalry), and alternations between two images that depend on eye of origin.