de'Sperati C, Stucchi N
Dipartimento di Psicologia, Università di Torino, Italy.
Exp Brain Res. 1995;105(2):254-60. doi: 10.1007/BF00240961.
The visual system is particularly sensitive to the covariation between velocity and curvature that constraint biological motion. Previous work showed that, when this biological constraint is satisfied, simple elliptical motion of a dot looks constant, although its velocity is highly non-uniform. This paper addresses the hypothesis that such a dynamic illusion is dependent upon smooth pursuit eye movements. Subjects had to adjust the kinematics of a dot moving along elliptical trajectories until they perceived a constant velocity. Different pursuit and fixation conditions were tested. The research shows that the dynamic illusion is largely independent of eye movements, suggesting that the visual system has access to implicit knowledge of motor constraints regardless of the concurrent oculomotor commands.
视觉系统对限制生物运动的速度和曲率之间的协变特别敏感。先前的研究表明，当这种生物限制得到满足时，一个点的简单椭圆运动看起来是恒定的，尽管其速度极不均匀。本文探讨了这样一种假设，即这种动态错觉依赖于平稳跟踪眼球运动。受试者必须调整沿椭圆轨迹移动的点的运动学，直到他们感知到恒定速度。测试了不同的跟踪和注视条件。研究表明，这种动态错觉在很大程度上与眼球运动无关，这表明视觉系统能够获取运动限制的隐性知识，而与同时发出的动眼神经指令无关。
