Cogn Neuropsychol. 1998 Sep 1;15(6-8):535-52. doi: 10.1080/026432998381014.
To function adeptly within our environment, we must perceive and interpret the movements of others. What mechanisms underlie our exquisite visual sensitivity to human m ovement? To address this question, a set of psychophysical studies was conducted to ascertain the temporal characteristics of the visual perception of human locomotion. Subjects viewed a computer-generated point-light walker presented within a mask under conditions of apparent motion. The temporal delay between the display frames as well as the motion characteristics of the mask were varied. With sufficiently long trial durations, performance in a direction discrimination task remained fairly constant across inter-stimulus interval (ISI) when the walker was presented within a random motion mask but increased with ISI when the mask motion duplicated the motion of the walker. This pattern of results suggests that both low-level and high-level visual analyses are involved in the visual perception of human locomotion. These findings are discussed in relation to recent neurophysiological data suggesting that the visual perception of human movement may involve a functional linkage between the visual and motor systems.
为了在我们的环境中熟练地运作，我们必须感知和解释他人的动作。我们对人类运动的视觉敏感度的精妙机制是什么？为了解决这个问题，进行了一系列心理物理学研究，以确定人类运动视觉感知的时间特征。在视在运动的条件下，受试者观看一个计算机生成的点光步行者在一个掩蔽下呈现。改变显示帧之间的时间延迟以及掩蔽的运动特征。在足够长的试验持续时间内，当步行者在随机运动掩蔽中呈现时，在方向辨别任务中的表现在刺激间间隔（ISI）上保持相当稳定，但当掩蔽运动复制步行者的运动时，表现会随着 ISI 增加。这种结果模式表明，在人类运动的视觉感知中，涉及到低水平和高水平的视觉分析。这些发现与最近的神经生理学数据有关，这些数据表明，人类运动的视觉感知可能涉及视觉和运动系统之间的功能联系。
