Hirai Masahiro, Saunders Daniel R, Troje Nikolaus F
Department of Psychology, Queen's University, Kingston, Ontario, Canada.
J Vis. 2011 Mar 7;11(3):4. doi: 10.1167/11.3.4.
Directional information can be retrieved from a point-light walker (PLW) in two different ways: either from recovering the global shape of the articulated body or from signals in the local motion of individual dots. Here, we introduce a voluntary eye movement task to assess how the direction of a centrally presented, task-irrelevant PLW affects the onset latency and accuracy of saccades to peripheral targets. We then use this paradigm to design experiments to study which aspects of biological motion-the global form mediated by the motion of the walker or the local movements of critical features-drive the observed attentional effects. Putting the two cues into conflict, we show that saccade latency and accuracy were affected by the local motion of the dots representing the walker's feet-but only if they retain their familiar, predictable location within the display.
方向信息可以通过两种不同方式从点光行走者（PLW）中获取：要么通过恢复关节身体的整体形状，要么通过单个点的局部运动中的信号。在这里，我们引入了一项自主眼动任务，以评估中央呈现的、与任务无关的PLW的方向如何影响向外周目标进行扫视的起始潜伏期和准确性。然后，我们使用这个范式设计实验，以研究生物运动的哪些方面——由行走者运动介导的整体形式或关键特征的局部运动——驱动了观察到的注意力效应。将这两种线索置于冲突中，我们发现扫视潜伏期和准确性受到代表行走者脚部的点的局部运动的影响——但前提是它们在显示器中保持其熟悉、可预测的位置。
