McKay Lawrie S, Simmons David R, McAleer Phil, Pollick Frank E
Department of Psychology, University of Glasgow, Glasgow, UK.
Vision Res. 2009 Oct;49(20):2503-8. doi: 10.1016/j.visres.2009.08.008. Epub 2009 Aug 12.
Understanding how structure and motion information contribute to the perception of biological motion is often studied with masking techniques. Current techniques in masking point-light walkers typically rely on adding surrounding masking dots or altering phase relations between joints. Here, we demonstrate the use of novel stimuli that make it possible to determine the noise level at which the local motion cues mask the opposing configural cues without changing the number of overall points in the display. Results show improved direction discrimination when configural cues are present compared to when the identical local motion signals are present but lack configural information.
理解结构和运动信息如何有助于生物运动感知通常采用掩蔽技术进行研究。目前用于掩蔽点光行走者的技术通常依赖于添加周围的掩蔽点或改变关节之间的相位关系。在这里，我们展示了一种新颖刺激的应用，它能够在不改变显示中总点数的情况下，确定局部运动线索掩蔽相反构型线索的噪声水平。结果表明，与存在相同的局部运动信号但缺乏构型信息时相比，当存在构型线索时方向辨别能力有所提高。
