| Project/Area Number |
10558015
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Educational technology
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| Research Institution | HOKKAIDO UNIVERSITY |
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Principal Investigator |
TAKAHASHI Makoto Hokkaido Univ., Grad.School of Eng., Assoc.Prof., 大学院・工学研究科, 助教授 (10154858)
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| Co-Investigator(Kenkyū-buntansha) |
MURATA Waka Hokkaido Univ., College of Medical Technology., Assoc.Prof., 医療技術短期大学部, 助教授 (10200304)
KUDO Nobuki Hokkaido Univ., Grad.School of Eng., Instructor, 大学院・工学研究科, 助手 (30271638)
YAMAMOTO Katsuyuki Hokkaido Univ., Grad.School of Eng., Prof., 大学院・工学研究科, 教授 (10088867)
MITOBE Kazutaka Akita Univ., Faculty of Eng.and Resource Science., Lecturer, 工学資源学部, 講師 (60282159)
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| Project Period (FY) |
1998 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥5,900,000 (Direct Cost: ¥5,900,000)
Fiscal Year 2000: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1999: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1998: ¥3,300,000 (Direct Cost: ¥3,300,000)
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| Keywords | inner-space / audio-visual stimulation / learning disability / space recognition / upper limb movement |
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| Research Abstract |
A number of children with learning disabilities (LD) are not good at visuomotor control. In this study, we analyzed hand trajectories of reaching movements under rotated visual feedback in subjects with and without LD.Each reaching movement has two components : an "initial impulse" (ballistic movement) and a series of "secondary adjustments" (corrective movement) made subsequently to attain the final target position. In the present study, the error in ballistic movement was determined by measuring the angle between the direction in which the subject started to reach out and the direction of the target (error angle), and the error in corrective movement was determined by the measuring the area between the trajectory and a straight line drawn between the starting point and end point (error area). In the initial movement when the visual field had been rotated 30 deg, error angles were about -30 deg in both the LD and normal groups ; however, the error area was 2.9 cm2 greater in the LD group than in the normal group. The sum of error angles in 10 trials under this condition was significantly higher in the LD group than in the normal group. These results suggested that the LD subjects had worse skills in ballistic movement than did the normal subjects and that adaptation by the LD subjects occurred more slowly than that by the normal subjects.
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