A new figure identification task for analyzing the relation between information processing and a spontaneous blink is proposed. A characteristic of our visual tasks different from conventional discrete trial tasks is to adopt a time-varying image presentation method. The following two blink-occurrence factors can be analyzed independently by using this method. One of the factors is the factor which relates to the termination of information processing, the other is the factor which relates to discontinuous physical change associated with the onset or offset of a stimulus. In this paper, the psychological experiment was designed using the identification task of Katakana represented in contour. As the result of the experiment, next findings were obtained. First, when the figure is continuously presented during a trial, a blink has the tendency which occur delaying than immediately after the completion of the identification. Second, a blink tends to occur at the onset of the figure which does not include useful information for the identification.
