Noy Lior, Rumiati Raffaella Ida, Flash Tamar
Applied Mathematics and Computer Science Department, Weizmann Institute of Science, P.O. Box 26, 76100 Rehovot, Israel.
Brain Cogn. 2009 Mar;69(2):360-8. doi: 10.1016/j.bandc.2008.08.030. Epub 2008 Oct 1.
The aim of this study was to pinpoint the nature of the visual features used in the automatic mapping of perceived movements into similar executed movements, following the direct matching hypothesis. In Experiment 1 subjects imitated the lifting of one of two fingers, presented with different orientations. As predicted, stimuli which were further rotated away from the posture of the executing hand elicited slower reaction times. In Experiment 2, we verified that this orientation effect was not a purely perceptual effect by presenting the same stimuli but asking subjects to respond verbally. No orientation effect was found using a verbal response. In Experiment 3, we replaced the moving fingers by two arbitrary objects moving with the trajectories of the finger tips of Experiment 1. The same orientation effect as in Experiment 1 was observed. We conclude that in this experiment participants are using purely kinematic features to map perceived into executed movements.
本研究的目的是根据直接匹配假说，确定在将感知到的动作自动映射到相似的执行动作过程中所使用的视觉特征的本质。在实验1中，受试者模仿抬起两个不同方向呈现的手指中的一个。正如预测的那样，与执行手的姿势偏离更大的刺激引发的反应时间更长。在实验2中，我们通过呈现相同的刺激但要求受试者口头做出反应，验证了这种方向效应不是纯粹的感知效应。使用口头反应未发现方向效应。在实验3中，我们用两个沿着实验1中指尖轨迹移动的任意物体取代了移动的手指。观察到与实验1中相同的方向效应。我们得出结论，在本实验中，参与者使用的是纯粹的运动学特征将感知到的动作映射到执行动作中。
