Wang [8] Nickel [3] Henriques [9] Khan [4] McManus [11] Cui Hondzinski [12] Crawford [13] ( lh/le) ( lh/re) ( rh/le) ( rh/re) 4 4 ( L Hand L Ey
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1 1,2,a) 3 1,2 1,2 1. () Vogel [1] [2] [3] a) mashita@ime.cmc.osaka-u.ac.jp Khan [4] [5] 2. Soechting[6] Brain[5] (reaching distance) (walking distance) reaching distance walking distance [7] walking distance c 215 Information Processing Society of Japan 1
2 Wang [8] Nickel [3] Henriques [9] Khan [4] McManus [11] Cui Hondzinski [12] Crawford [13] ( lh/le) ( lh/re) ( rh/le) ( rh/re) 4 4 ( L Hand L Eye ) ( L Hand R Eye ) ( R Hand L Eye ) ( R Hand R Eye ) Soechting [6] [9] [4], [1], [13] 1.2 Khan [4] c 215 Information Processing Society of Japan 2
3 情報処理学会研究報告 仮説 1.3 左眼利きの場合 右側に比べて左側の推定精度 が高く 右眼利きの場合 左側に比べて右側の推定精度が 高い 本仮説では利き眼とターゲットの位置による精度の違い 32 cm Center front 22.5 cm について検証する 左眼利き被験者による左側への指差し および右眼利き被験者によるによる右側への指差しに対し 2.1 m Eye level て 左目利き被験者による右側への指差しおよび右目利き 被験者による左側への指差しを比較する 利き手に関する仮説 2.8 m 本節では指差しを行う手と指差したターゲットの位置 利き手の関係について以下の仮説を考える Head immobilizer 仮説 2.1 利き手による指差しの方が 非利き手を用いる 場合に比べ推定精度が高い 2.5 m 2.1 m Wang ら [8] によると利き手と非利き手では動作の安定 Marker 性が異なるとされている 本仮説では指差し動作の精度に 対する利き手の影響を比較する 仮説 2.2 被験者から見て左側 右側 に対しては左手 右 手 を用いた方が推定精度が高い 本仮説ではその歪みが利き手の違いによるものではな 図 1 実験の配置図 く ターゲットの位置の左右によるものなのか検証する すなわち 指差しを行っている側のターゲットを指差して いる場合と反対側のターゲットを指差している場合につい て比較する 仮説 2.3 左手利きの場合 右側に比べて左側の推定精度 が高く 右手利きの場合 左側に比べて右側の推定精度が Head immobilizer 高い 利き手が空間認知に与える影響は低いと考えられるが 仮説 1.3 と同様に 利き手が空間認知自体の対称性に影響 を与えている可能性を検証する 以上の仮説に基づいて 利き手と利き眼の違いについて 解析を行う 3.3 被験者実験 大学生および大学院生 23 名に対して実験を実施した 全員男性であり 内訳は LHand LEye 6 名 LHand REye 5 名 RHand LEye 6 名 RHand REye 6 名である 利き眼の 判定には the hole-in-the-card test を用い 利き手につい ては自己申告とした 課題として 2.8 m 2.1 m の壁面スクリーンに表示さ れた縦横 9 9 の 81 箇所のターゲットに対する指差しを行 Marker う 被験者の頭部からスクリーンまでの距離は 2.5 m であ り 隣接するターゲット間の間隔は横 32 cm 縦 22.5 cm である 図 1 に本実験の配置を示す 被験者は椅子に着席し 頭部を固定した状態で指差しを 行う 椅子の高さは中央のターゲット スクリーン中央 と被験者の眼の位置が水平になるよう調整する 指差しの 図 2 被験者の様子 際 肘を曲げず 肩から指先までまっすぐ伸ばした状態で 指差しするように教示する 全 81 か所のターゲットに対 c 215 Information Processing Society of Japan 3
4 1 5 1 ±3cm HSD All Data L Hand L Eye Dominant Eye Non-Dominant Eye 3 Pointing Eye Side Tgt 1.1 Non-pointing Eye Side Tgt LHLE, L Hand R Eye LHRE, R Hand L Eye RHLE, R Hand R Eye RHRE 95% (p =.5) (L Hand R Eye, R Hand R Eye ) (L Hand L Eye, R Hand L Eye ) c 215 Information Processing Society of Japan 4
5 1 1 Source Sum Sq. d.f. Mean Sq. F Prob>F DominantEyePointing e-235 PointingEyeSideTarget e-261 DominantEyeSideTarget e-39 Error Total Dominant Eye Side Tgt Non-dominant Eye Side Tgt Dominant Hand Non-dominant Hand Pointing Hand Side Tgt Non-pointing Hand Side Tgt HSD R Hand L Eye c 215 Information Processing Society of Japan 5
6 2 2 Source Sum Sq. d.f. Mean Sq. F Prob>F DominantHandPointing PointingHandSideTarget DominantHandSideTarget Error Total Dominant Hand Side Tgt Non-dominant Hand Side Tgt L Hand L Eye L Hand R Eye [14] 4. 9 R Hand L Eye R Hand R Eye lh/le lh/re lh/le lh/re 3 L Hand R Eye L Hand L Eye R Hand R Eye R Hand L Eye lh/le lh/re rh/le rh/re 9, 1 L Hand R Eye R Hand R Eye L Hand L Eye R Hand L Eye L Hand L Eye R Hand L Eye L Hand R Eye R Hand R Eye L Hand L Eye L Hand R Eye R Hand L Eye R Hand R Eye 1 rh/le rh/re rh/le rh/re c 215 Information Processing Society of Japan 6
7 3 11 A L Hand L Eye 12 B R Hand R Eye A L Hand L Eye B R Hand R Eye A A B B the hole-in-the-card test 5. 4 [1] Vogel, D. and Balakrishnan, R.: Distant Freehand Pointing and Clicking on Very Large, High Resolution Displays, UIST 25, pp (25). [2] Sato, S. and Sakane, S.: A human-robot interface using an interactive hand pointer that projects a mark in the real work space, ICRA 2, pp (2). [3] Nickel, K. and Stiefelhagen, R.: Pointing Gesture Recognition based on 3D-tracking of Face, Hands and Head Orientation, ICMI 23, pp (23). [4] Khan, A. Z. and Crawford, J. D.: Ocular Dominance Reverses as a Function of Horizontal Gaze Angle, Vision Research, Vol. 41, No. 14, pp (21). [5] Brain, W. R.: Visual disorientation with spatial reference to lesions of the right cerebral hemisphere, Brain, Vol. 64, pp (1941). [6] Soechting, J. F. and Flanders, M.: Sensorimotor Representations for Pointing to Targets in Three-dimensional Space, J. of Neurophysiology, Vol. 62, No. 2, pp (1989). [7] Yoshida, C. and Inui, T.: Transformation process of the visuomotor memory representation of a target in far space after body rotation, Psychologia, Vol. 47, No. 2, pp (24). [8] Wang, J. and Sainburg, R. L.: The Dominant and Nondominant Arms are Specialized for Stabilizing Different Features of Task Performance, Experimental Brain Research, Vol. 178, pp (27). [9] Henriques, D. Y. P., Medendorp, W. P., Gielen, C. C. A. M. and Crawford, J. D.: Geometric Computations Underlying Eye-hand Coordination: Orientations of the Two Eyes and The Head, Experimental Brain Research, Vol. 152, pp (23). [1] Quartley, J. and Firth, A. Y.: Binocular sighting ocular dominance changes with different angles of horizontal gaze, Binocul Vis Strabismus Q, Vol. 19, No. 1, pp (24). [11] McManus, I., Porac, C., Bryden, M. and Boucher, R.: Eye-dominance, Writing Hand, and Throwing Hand, Laterality, Vol. 4, No. 2, pp (1999). [12] Cui, Y. and Hondzinski, J. M.: Gaze tracking accuracy in humans: Two eyes are better than one, Neuroscience Letters, Vol. 396, No. 3, pp (26). [13] Crawford, J. D., Medendorp, W. P. and Marotta, J. J.: Spatial Transformations for Eye-Hand Coordination, J. of Neurophysiology, Vol. 92, No. 1, pp (24). [14] Nielsen, J. A., Zielinski, B. A., Ferguson, M. A., Lainhart, J. E., and Anderson, J. S.: An evaluation of the left-brain vs. right-brain hypothesis with resting state functional connectivity magnetic resonance imaging. PloS one, Vol. 8, No. 8, e71275, (213). c 215 Information Processing Society of Japan 7
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