抄録
The limits of attention was investigated. In Exp. 1, 12 subjects were told to respond to the central signal presented in the tachistoseope. The RTs were affected differentially by the kinds of the flanking noise letters, if the spacing between signal and noise letters was 0.5° of visual angle. However, the limits of attention could be expanded, when 10 subjects were exposed to a task adapted from the Stroop test (Exp. II). Another group of 12 subjects were tested with SOAs (stimulus onset asynchrony) inserted between target and noise onsets (Exp. III). The 30 msec lead of the noise tended to restore the noise-target interaction even at the spacing of 1.5°.