Monoptic and dichoptic metacontrasf

Metacontrast suppression was compared under conditions of monoptic and dichoptic presentation. It was found that interference was greater with dichoptic than with monoptic presentation, and that the point of maximum interference differed in the two conditions. The interference curve generated as a function of inter-stimulus interval (ISI) was also different; monoptically a “U”-shaped curve was found, whereas dichoptically the curve appeared to be more “J”-shaped. Theoretical implications are discussed, and it is suggested that binocular rivalry may play a role in dichoptic interference.