著者

中山 友瑛 片山 正純

出版者

日本認知科学会

雑誌

認知科学 (ISSN:13417924)

巻号頁・発行日

vol.27, no.4, pp.567-579, 2020-12-01 (Released:2020-12-15)

参考文献数

23

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In this paper, by classifying a morphological similarity between the human hand and a virtual/man-made hand into structural and appearance similarities, we investigated sense of body consciousness and visual body-part localization for the virtual hands of point-lights and skeleton displays for which structural similarity was high but the appearance similarity was extremely low. In the first experiment, questionnaire ratings of the senses of agency for both displays were high in training of a finger movement task. Because each of the senses of body ownership was evaluated as a bimodal distribution, participants were classified into higher and lower groups. The senses of both of the lower groups were significantly low. The senses of the higher group for the skeleton display were significantly high for the training. For the point-lights display, although the senses of the lower group were relatively low at the beginning of the training, the senses increased to the same rating as those for the skeleton display through the training. In the second experiment, the fingertip positions of each display were shifted to the left by 15 cm. Although the senses of agency were significantly high for both displays, the senses of body ownership of both were significantly low. The drift of the visual body-part localization rose and the proprioceptive drift was also observed after the training. Thus, these results indicate that a sense of body ownership occurs even for a point-lights display, and moreover, the drifts rise even when the sense is not felt.

著者

中山 友瑛 片山 正純

出版者

日本認知心理学会

雑誌

日本認知心理学会発表論文集

巻号頁・発行日

vol.2019, 2019

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<p>身体意識の成立には,意図した運動,運動指令の遠心性コピーから予測した運動,感覚情報のそれぞれの比較が重要である.この観点から,身体所有感の成立に必要となる最小限の身体の視覚情報を明らかにするために,仮想空間内に手の指先・関節位置に点を表示する光点提示および骨格提示に対する身体意識(運動主体感と身体所有感)を調査した.各提示条件において手指の運動課題を3セット繰り返し,セット毎に身体意識のアンケート調査を行った.この結果,運動主体感は両条件における全てのセットで高い評定値となった.一方,身体所有感を評定値の高いグループと低いグループに分けて評価した結果,高いグループにおいて骨格条件では全てのセットで高い評定値となった.しかし,光点条件ではセット毎に評定値が徐々に高くなり,第3セット後には骨格条件と同程度に高くなった.以上より,手の光点提示に対しても身体所有感が成立することを明らかにした.</p>