| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
In this study, we investigated a relationship between cognitive judgment of tool size and a relearned internal model of the hand. In an experimental paradigm we built, an internal model of the hand could be relearned by repeating finger movements while watching a geometrically deformed hand shape. In each training condition of the normal and deformed hand, we measured the object size that could be recognized as a tool. After the learning in the deformed hand condition of the dominant hand, the object sizes became significantly larger for tools to be mainly used in the dominant hand. These results show that the internal model affects cognitive judgment of tool sizes.Moreover, in the participants that sense of body ownership of the displayed hand was relatively low, both of the object sizes in the normal hand and transformed hand conditions were almost the same. This indicates that the sense of body ownership is important to learn the internal model of the human arm.
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