Used psychophysical techniques to examine how subpopulations of visual neurons varying in their ocular dominance interacted in determining performance on a visual task. Using an asymmetric alternating adaptation of the left and right eyes, the sensitivity of monocularly driven neurons was manipulated while the sensitivity of binocularly driven neurons was kept constant. Relative threshold elevations were measured in the left eye, right eye, and both eyes of 5 23-35 yr old experienced observers following different ratios of alternating adaptation. Whereas monocularly measured aftereffects varied monotonically as a function of the adaptation duration of the measured eye, the magnitude of the binocularly measured aftereffect remained constant regardless of how the adaptation was divided between the 2 eyes. This suggests that neurons differing in their ocular dominance pool their activity in determing sensitivity to a test target. (23 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved). © 1984 American Psychological Association.