Visual evoked potentials (VEPs) are nearly the only electrophysiological technique readily available to study human visual functions. Of these, cyclopean VEPs are particularly useful because they are generated only when the two eyes are stimulated simultaneously, and hence allow us to study binocular mechanisms in isolation. In this technical report, two VEP experiments using different types of binocular stimulation are described and a portion of results is reported. In the first experiment, VEP responses to chromatic dynamic random dot stereograms are recorded varying luminance contrast ratio. All previous VEP studies used random dot patterns defined by luminance, and it would be worthwhile to see if responses change when the dot patterns are defined purely by hue differences. The second experiment was conducted to demonstrate and utilize in humans cyclopean VEPs elicited by opposite-drift gratings. The purpose of this report is to introduce VEP research activity at ATR Visual Perception Laboratory by presenting some preliminary data. This report is by no means final; both experiments are still on-going projects, and quantitative analyses of the data has not been conducted.