Fademrecht Laura, Bülthoff Isabelle, de la Rosa Stephan
J Vis. 2016;16(3):33. doi: 10.1167/16.3.33.
Recognizing whether the gestures of somebody mean a greeting or a threat is crucial for social interactions. In real life, action recognition occurs over the entire visual field. In contrast, much of the previous research on action recognition has primarily focused on central vision. Here our goal is to examine what can be perceived about an action outside of foveal vision. Specifically, we probed the valence as well as first level and second level recognition of social actions (handshake, hugging, waving, punching, slapping, and kicking) at 0° (fovea/fixation), 15°, 30°, 45°, and 60° of eccentricity with dynamic (Experiment 1) and dynamic and static (Experiment 2) actions. To assess peripheral vision under conditions of good ecological validity, these actions were carried out by a life-size human stick figure on a large screen. In both experiments, recognition performance was surprisingly high (more than 66% correct) up to 30° of eccentricity for all recognition tasks and followed a nonlinear decline with increasing eccentricities.
识别某人的手势是表示问候还是威胁对于社交互动至关重要。在现实生活中，动作识别发生在整个视野范围内。相比之下，先前关于动作识别的许多研究主要集中在中央视觉上。在这里，我们的目标是研究在中央凹视觉之外对一个动作能感知到什么。具体来说，我们用动态动作（实验1）以及动态和静态动作（实验2），在0°（中央凹/注视点）、15°、30°、45°和60°的偏心率下，探究社交动作（握手、拥抱、挥手、拳击、掌掴和踢腿）的效价以及一级和二级识别。为了在良好的生态效度条件下评估周边视觉，这些动作由一个真人大小的人体简笔画在大屏幕上进行。在两个实验中，对于所有识别任务，在偏心率达到30°时，识别性能都出奇地高（正确率超过66%），并且随着偏心率增加呈非线性下降。
