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ISSN : 1226-9654

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Vol.6 No.1

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Effects of interletter distance and the nature of attention shift

The Korean Journal of Cognitive and Biological Psychology / The Korean Journal of Cognitive and Biological Psychology, (P)1226-9654; (E)2733-466X
1994, v.6 no.1, pp.31-40
Young-Ai Lee (Ehwa Women's University)
Young-Rim Lee (Kyungpook National University)
Ho-Wan Kwak (Kyungpook National University)
Lee, Y., Lee, Y., & Kwak, H. (1994). Effects of interletter distance and the nature of attention shift. The Korean Journal of Cognitive and Biological Psychology, 6(1), 31-40.

Abstract

Two experiments were carried out to examine the nature of distance effects in a task that requires subjects to shift their attention from one location to another. A continuous model of attention movement predicts that RT increases as the interletter distance increases, whereas a discrete model of attention shift predicts no distance effects on RT. Experiment 1 presented stimulus display with long exposure to examine the nature of attention movement in the natural condition that permits subjects' eye movements. Subjects' task was to determine whether one of the two letters cued by green circles contained a target letter in the stimulus display. As a result, reaction time to the target letter increased as the distance between cued letters increased, supporting the continuous model. In experiment 2, eye movements were controlled by presenting the stimulus display briefly. In contrast to the result of experiment 1, experiment 2 did not show any effect of distance. The data suggest that when eye movements are restricted, attention moves in a discrete manner.

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The Korean Journal of Cognitive and Biological Psychology

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