Sanders Abram F J, Kappers Astrid M L
Physics of Man, Helmholtz Institute, Utrecht University, P.O. Box 80 000, 3508 TA, Utrecht, The Netherlands.
Exp Brain Res. 2009 Feb;192(4):717-22. doi: 10.1007/s00221-008-1635-y. Epub 2008 Nov 12.
In the haptic filled-space illusion for active dynamic touch, observers move their fingertip across an unfilled extent or an extent filled with intermediate stimulations. Previous researchers have reported lengths of filled extents to be overestimated, but the parameters affecting the strength of the illusion are still largely unknown. In the current research, we show that the illusion persists when intermediate stimulations do not provide information about the extent's length. In addition, the results show that the strength of the illusion increases with the number of filler elements. In contrast with earlier research, we control for movement speed differences between filled and unfilled extents. The results suggest that the strength of the illusion is independent of the overall average movement speed. Insight into factors affecting the strength of the illusion may provide a better understanding of the kinematic mechanisms underlying haptic length perception.
在主动动态触觉的触觉填充空间错觉中，观察者将他们的指尖移动过一个未填充的范围或一个充满中间刺激的范围。先前的研究人员报告说，填充范围的长度被高估了，但影响错觉强度的参数在很大程度上仍然未知。在当前的研究中，我们表明，当中间刺激不提供有关范围长度的信息时，错觉仍然存在。此外，结果表明，错觉的强度随着填充元素的数量增加而增加。与早期研究不同，我们控制了填充和未填充范围之间的运动速度差异。结果表明，错觉的强度与整体平均运动速度无关。深入了解影响错觉强度的因素可能有助于更好地理解触觉长度感知背后的运动机制。
