Effects of arousal on attention to central and peripheral visual stimuli |
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| Authors: | K L Shapiro T L Johnson |
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| Institution: | 1. Applied Technology for Neuro-Psychology Lab, Istituto Auxologico Italiano, Milan, Italy;2. Aix-Marseille University, CNRS, ISM UMR 7287, Mediterranean Virtual Reality Center, Marseilles, France;3. Department of Psychology, Università Cattolica del Sacro Cuore, Milan, Italy;1. McLean Neuroimaging Center, McLean Hospital, Belmont, MA, USA;2. Department of Psychiatry, Harvard Medical School, Belmont, MA, USA;3. Suffolk University, Boston, MA, USA;1. New York State Psychiatric Institute, New York, NY 10032, United States;2. Columbia University Medical Center, New York, NY 10032, United States;3. Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY 10032, United States;4. San Diego State University/University of California, San Diego Joint Doctoral Program in Public Health (Epidemiology), San Diego, CA 92093, United States;1. School of Finance and Statistics, East China Normal University, Shanghai 200241, China;2. H. Milton Stewart School of Industrial and Systems Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0205, USA |
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| Abstract: | Human attention research has demonstrated that vision dominates attention when vision is competing against audition under normal conditions, but that audition dominates attention under conditions of arousal set by electric shock. Two experiments were conducted to determine whether an attentional switching mechanism exists between the central and peripheral visual systems similar to that which exists between the visual and auditory modalities. In experiment 1, increasing subject's level of arousal by administering brief electric shocks resulted in attenuated central visual dominance of attention with a predictably located central stimulus and a randomly located peripheral stimulus. In experiment 2, where locations of both peripheral and central stimuli were unpredictable, peripheral visual dominance was observed in the aroused subjects. Non-aroused control groups in both experiments demonstrated central visual dominance. The results are discussed in terms of the adaptive significance of attentional switching mechanisms. |
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