言語負荷課題が視空間認知の左右非対称性に及ぼす効果

河合 優年

doi:10.4992/jjpsy.50.310

EFFECTS OF THE VERBAL LOADING ON LATERALITY DIFFERENCE IN VISUAL FIELD

MASATOSHI KAWAI

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JOURNAL FREE ACCESS

1980 Volume 50 Issue 6 Pages 310-317

DOI https://doi.org/10.4992/jjpsy.50.310

[Correction] The Japanese Journal of Psychology Vol.51 No.2 (1980) pp.e1b-e1b

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Published: March 21, 1980 Received: May 07, 1979 Available on J-STAGE: July 16, 2010 Accepted: - Advance online publication: - Revised: -
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Date of correction: July 16, 2010 Reason for correction: - Correction: ABSTRACT Details: Wrong : In connection with Kinsbourne's attentionmodel, studies of cerebral dominance have concentrated on the relations between the kind of loading task and the visual-laterality difference. Some of them suggested that the difficulty of the loading task might be an important factor of the visual-laterality difference.
The present study investigated the relations between the level of hemisphere sharing of the verbal loading task and the visual-laterality difference. The loading tasks in Exp. I were the “same-different” judgment on Japanese hiragana alphabets (A1), and of triliteral hiragana words (W1), and the “true-false” judgment of short statements (S1). Test tasks were detection of a triangle preesnted in the right or the left visual field simultaneously with the second verbal stimuli of the loading task. The subjects were 13 (8 male and 5 female) right-handed college students.
On the basis of attention-model, the right field superiority was expected in all conditions because the verbal stimuli were presented as loading task. As the results, the right field superiority was found only in the S1 condition. Lack of right field superiority in A1 and W1 conditions might be attributed to the following two factors: 1) Under these conditions, the subjects matched the letters or words configurationally on the basis of the physical characteristics of the stimuli, and 2) the load in these conditions was not heavy enough to activate the left cerebrum.
In Exp. II, a procedure to eliminate configurational matching of the letters was followed. It was run 2 to 3 weeks after the Exp. I. The loading tasks in Exp. II were the “same-different” judgment between hiragana and katakana alphabets (A2), the “same-different” judgment of triliteral hiragana words (the capital letter was always the same: W2), and the “true-false” judgment of short statements (read aloud by subjects: S2). Test stimuli and subjects were the same as in the Exp. I.
The results showed that W2 and S2 conditions yielded significant right field superiorities, but A2 did not. These results suggest that Kinsbourne's model holds within certain range of hemisphere sharing of loading task, at least with verbal task. The shift of attention may occur only when the level of hemisphere sharing of the loading task exceeds a certain lower bound. Whether any upper bound exists for task difficulty are to be examined in the future research.
Right : In connection with the Kinsbourne's attention-model, the relation between the level of hemisphere sharing of loading task and the visual-laterality difference was examined under verbal loading conditions. The subjects were 13 (8male and 5 female) right-handed college students. The loading tasks in Exp. I were the “same-different” judgment of Japanese hiragana alphabets and of triliteral hiragana words, and “true-false” judgment of short statements. In Exp. II, a procedure to eliminate configurational matching of the letters was followed. The results of the two experiments suggest that the visual-laterality effect occurs only when the level of hemisphere sharing of the loading task exceeds a certain lower bound.

Abstract

In connection with the Kinsbourne's attention-model, the relation between the level of hemisphere sharing of loading task and the visual-laterality difference was examined under verbal loading conditions. The subjects were 13 (8male and 5 female) right-handed college students. The loading tasks in Exp. I were the “same-different” judgment of Japanese hiragana alphabets and of triliteral hiragana words, and “true-false” judgment of short statements. In Exp. II, a procedure to eliminate configurational matching of the letters was followed. The results of the two experiments suggest that the visual-laterality effect occurs only when the level of hemisphere sharing of the loading task exceeds a certain lower bound.

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