Previous investigations of binocular visual phenomena (i.e., stereopsis, rivalry, and Fusion) have been confined to human subjects. But recent developments in the technology of behavioral testing and in visual display generation make it possible to extend the inquiry to animals. This progress report describes ongoing research concerned with a) an objective method for measuring binocular rivalry, known as optokinetic nystagmus rivalry, and b) operant conditioning methodology' used for measuring stereopsis in animals.
For a, data are presented suggesting that optokinetic nystagmus rivalry can be used as a valid indicator for both humans and animals. For b, measurement of stereo-acuity thresholds in the cat by the conditioned suppression method is described.