The effect of head turn on auditory asymmetry |
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| Authors: | M C Corballis M J McNeill |
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| Affiliation: | 1. Biosystems Engineering Department, “Luiz de Queiroz”, College of Agriculture, University of São Paulo (ESALQ/USP), Piracicaba, 13418-900, Brazil;2. Agricultural and Biological Engineering Department, University of Florida, P.O. Box 32611, Gainesville, FL 32611, USA;1. School of Health and Exercise Sciences, University of British Columbia, ART 360 – 3333 University Way, Kelowna, BC V1V 1V7, Canada;2. MD/PhD Program, University of British Columbia, 2894 Detwiller Pavilion, 2255 Wesbrook Mall, Vancouver, BC V6T 2A1, Canada;3. Southern Medical Program, Reichwald Health Sciences Centre, University of British Columbia Okanagan, 1088 Discovery Avenue, Kelowna, BC V1V 1V7, Canada;4. Experimental Medicine Program, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada;5. Department of Kinesiology and Applied Physiology, University of Delaware, Newark, DE, USA |
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| Abstract: | In two experiments, right-handed men and women were tested for ear differences in report of dichotically presented digits, with their heads straight ahead, turned 90 degrees to the left, and turned 90 degrees to the right. In Experiment 1, head turn was controlled simply by asking the subjects to fixate an appropriately located point; a right-ear advantage occurred under all conditions of head turn among the men, but only in the head-straight condition among the women. In Experiment 2, head turn was controlled by having the subjects direct a flashlight attached to their heads toward the fixation point. This eliminated the right-ear advantage under all head conditions for the men, but for the women the right-ear advantage was, if anything, more pronounced when their heads were turned than when straight. These results suggest that auditory asymmetry depends in part on whether space is perceived as divided into left and right sides, and in part of the balance between spatial and verbal requirements. Both factors, and the asymmetry itself, may interact with sex. |
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