| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2006: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2005: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2004: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Research Abstract |
In order to transpose our visual field horizontally or vertically, we can use video systems other than optical systems. Using the former system, I made a device which produce delayed feedback vision as well as spatially transposed vision. Some participants wore a head-mounted video display and performed some tasks to write Japanese or English letters and draw some figures. During the tasks, the experimenter recorded the traces of the light-emitted pen-point by a video camera, and digitalize the positions of the pen-points 30 times per second.
Under the delayed feedback condition, normal participants often over-traced the underneath model. Probably, they do the task guided by vision. However, they did not over-trace when they wrote Japanese Kanji characters. This time, they might write the Japanese characters guided by the kinetic sense already acquired. Contrary to our presupposition, the normal participants did not add abundant strokes to the letters in the writing tasks under the delayed feedback condition.
We also imposed the writing/drawing tasks on a patient who showed unilateral spatial neglect. To the patient, we imposed the writing/drawing tasks only under the normal vision condition. When we requested him to draw a double-circle, he perform it correctly when he did it with pencil under which he could see the trace of his hand. However, he drew abundantly when drawing with the light-pen under which he could not see it. For the task to draw a cube, he showed more prominent confusion; and we could not identify his trace to be a cube. These facts suggest that the drawing tasks under the condition that a performer cannot see the trace of his/her hand may be a promising method to detect some kinds of neuropsychological dysfunctions.
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