Philbeck John W, Woods Adam J, Arthur Joeanna, Todd Jennifer
Department of Psychology, George Washington University, Washington, DC 20052, USA.
Percept Psychophys. 2008 Nov;70(8):1459-70. doi: 10.3758/PP.70.8.1459.
Blind walking has become a common measure of perceived target location. This article addresses the possibility that blind walking might vary systematically within an experimental session as participants accrue exposure to nonvisual locomotion. Such variations could complicate the interpretation of blind walking as a measure of perceived location. We measured walked distance, velocity, and pace length in indoor and outdoor environments (1.5-16.0 m target distances). Walked distance increased over 37 trials by approximately 9.33% of the target distance; velocity (and to a lesser extent, pace length) also increased, primarily in the first few trials. In addition, participants exhibited more unintentional forward drift in a blindfolded marching-in-place task after exposure to nonvisual walking. The results suggest that participants not only gain confidence as blind-walking exposure increases, but also adapt to nonvisual walking in a way that biases responses toward progressively longer walked distances.
盲目行走已成为感知目标位置的常用方法。本文探讨了在实验过程中，随着参与者积累非视觉运动的经验，盲目行走可能会系统性变化的可能性。这种变化可能会使将盲目行走作为感知位置的一种测量方法的解释变得复杂。我们测量了室内和室外环境（目标距离为1.5 - 16.0米）中的行走距离、速度和步长。在37次试验中，行走距离增加了约目标距离的9.33%；速度（以及在较小程度上步长）也增加了，主要是在最初的几次试验中。此外，参与者在进行非视觉行走后，在蒙眼原地踏步任务中表现出更多无意的向前漂移。结果表明，参与者不仅随着盲目行走经验的增加而获得信心，而且还以一种使反应偏向于逐渐更长行走距离的方式适应非视觉行走。
