Brown Jennifer Rees, van der Zwan Rick, Brooks Anna
Laboratory of Cognitive Neuroscience and Behaviour, Southern Cross University, Coffs Harbour, New South Wales, Australia; e-mail:
Iperception. 2012;3(7):398-409. doi: 10.1068/i0495sas. Epub 2012 Jun 15.
External bilateral symmetry is a biological marker of normal development and is considered a signal of health and attractiveness across species. Because most human interactions are dynamic, it was hypothesized that observers would be able to perceive spatiotemporal symmetry-symmetry in motion-in human point-light walkers. It was also hypothesized that observers would rate symmetrical walkers as healthy and attractive. Symmetrical and asymmetrical figures were presented to adult participants (n = 22) in motion and as static images with motion implied. Static symmetry was readily perceived, and symmetrical figures were judged significantly healthier and more attractive than asymmetrical figures. However, observers were unable to discriminate symmetry in dynamic presentations. These data provide preliminary evidence of a temporal summation window for a dynamic symmetry perception.
外部双侧对称是正常发育的生物学标志，并且被认为是跨物种的健康和吸引力信号。由于大多数人际互动都是动态的，因此有人推测观察者能够在人类光点步行者中感知到时空对称——运动中的对称。还有人推测观察者会将对称的步行者评为健康且有吸引力。向成年参与者（n = 22）展示了动态的以及暗示有运动的静态图像形式的对称和不对称图形。静态对称很容易被感知到，并且对称图形被判定比不对称图形明显更健康、更有吸引力。然而，观察者无法辨别动态展示中的对称性。这些数据为动态对称感知的时间总和窗口提供了初步证据。
