1970 年 12 巻 3 号 p. 131-140
5 digits were sequentially presented to the same portion of the retina with various rates (50-4 cps) for 5 to 10 subjects, and the interactions among the visual responses to the digits were investigated. Subject's task was to report the whole digits he had seen (Exp. I) or to answer whether a particular digit had been contained in a stimulus series or not (Exp. II). Percentage of correct responses in both experiments varied as a function of serial position in the stimulus series. The serial position curves were almost always in U-shape and the bottom of the curves shifted from anterior to posterior serial position as the rate of presentation decreased. It was concluded that there are at least two kinds of interactions (forward and backward maskings) among responses in the visual mechanism for processing the information sequentially given with high speed.