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Lateral Difference in the Reproduction of Arm Positioning Movement : An Examination of the Hypothesis on the Levels of Psychological Processes


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Title: Lateral Difference in the Reproduction of Arm Positioning Movement : An Examination of the Hypothesis on the Levels of Psychological Processes
Authors: Yamauchi, Masaki / Imanaka, Kuniyasu / Nakayama, Masao / Matsunaga, Junichi
Issue Date: Mar-1998
Publisher: 日本生理人類学会
Citation: Applied human science : journal of physiological anthropology. 1998, 17(2), p.41-47
Abstract: The purpose of this study was to determine whether the hypothesis on the levels of psychological processes (Hatta, 1977, 1978) accounts for lateral differences in arm positioning movement (a spatial localization task). Fifteen right-handed male subjects were asked to perform a constrained criterion movement, 12 cm in length, with the left or right arm. Then, after a 10-sec retention interval, they were asked to perform the movement with the same arm, estimating lengths of 6, 12 or 24 cm. Different levels of psychological processes were assumed to be involved in estimating these various movement lengths-half, the same, or double that of the original. All possible combinations of the arm (left/right) and three movement length were tested. The CE scores were lower (more accurate) for the left arm (half; 1.5± 8.1 mm, same; 4.3 ± 6.2 mm, double; 5.9 ± 20.3 mm) than those for the right arm (half; 5.9 ± 7.6 mm, same; 10.6 ± 10.6 mm, double; 11.8 ± 23.6 mm) in all conditions, indicating a lateral difference (the right hemisphere dominance) in arm positioning tasks. This typical lateral difference, which displayed no significant difference among conditions, is supposed to be mediated by complex or high-level psychological processes. These psychological processes are required by the subjects in the estimation of the various movement lengths. This study suggests that the level of psychological processes is a crucial factor in the manifestation of lateral differences in the performance of arm positioning movements.
Keywords: lateral difference / arm positioning movement / psychological process / hemispheric specialization
URI: http://hdl.handle.net/10069/16801
ISSN: 13413473
Relational Links: http://ci.nii.ac.jp/naid/110002508216/
Rights: 日本生理人類学会 / 本文データは学協会の許諾に基づきCiNiiから複製したものである
Type: Journal Article
Text Version: publisher
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/16801

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