Gold Jason M, Tadin Duje, Cook Susan C, Blake Randolph
Department of Psychological and Brain Sciences, Indiana University, Bloomington, Indiana 47405, USA.
Percept Psychophys. 2008 Jan;70(1):88-95. doi: 10.3758/pp.70.1.88.
Humans can readily perceive biological motion from point-light (PL) animations, which create an image of a moving human figure by tracing the trajectories of a small number of light points affixed to a moving human body. We have applied ideal observer analysis to a standard biological motion discrimination task involving either full-figure or PL displays. Contrary to current dogma, we find that PL animations can be rich inpotential stimulus information but that human observers are remarkably inefficient at exploiting this information. Although our findings do not discount the utility of PL animation, they do provide a realistic measure of the computational challenge posed by biological motion perception.
人类能够轻松地从点光（PL）动画中感知生物运动，这种动画通过追踪附着在移动人体上的少量光点的轨迹来创建移动人体的图像。我们已将理想观察者分析应用于涉及全身或PL显示的标准生物运动辨别任务。与当前的教条相反，我们发现PL动画可能蕴含丰富的潜在刺激信息，但人类观察者在利用这些信息方面效率极低。尽管我们的研究结果并未否定PL动画的效用，但它们确实为生物运动感知所带来的计算挑战提供了一个现实的衡量标准。
