The Effects of the Required Processing of Stimuli on Selective Letter Identification

概要

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Eight undergraduate students participated in an experiment which was designed to explain the time lag effects proposed by Watanabe (1986): It takes a longer time to identify a target letter from a visual display consisting of multiple letters when the letters requiring a different response are similar than when they are dissimilar. The reaction time of pressing buttons to the target letter was measured as a function of the noises in the display. The reaction time was longer in the condition which contained noise letters than in the condition which did not. The time lag effects were not affected by the similarity of the elements in the display to the letters which result in the opposite response to the target. The results suggest that the effects are caused by the long processing required for the target and noise letters until late in the human visual information processing system.
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