Reinhardt-Rutland A H
Department of Psychology, University of Ulster at Jordanstown, Newtownabbey, Co Antrim, Northern Ireland.
Perception. 1994;23(7):763-9. doi: 10.1068/p230763.
Motion aftereffect (MAE) following spiral rotation is often asymmetrical: centrifugal MAE exceeds centripetal MAE. Pronounced MAE asymmetry has been reported for conditions--especially with a minimal background pattern--promoting perception of motion in depth. Such conditions are predicted to elicit motion asymmetry during adaptation. In the present study observers viewed luminous spirals monocularly in the dark; they timed, and scaled for convincingness, motion in depth during and after rotation. Motion in depth during rotation was often almost continuous, but recession was more convincing than was approach. Approaching MAE lasted longer and was more convincing than was receding MAE: the duration difference was more pronounced than has been found in other MAE studies, corroborating the link between MAE asymmetry and motion in depth. A possible line of explanation resides in comparing spiral motion in depth with real motion in depth of objects: in particular, the rapid visual change and collision with the observer that characterises real approach of an object is lacking in spiral approach. Interspecies differences for 'looming' and MAE are discussed.
螺旋旋转后的运动后效（MAE）通常是不对称的：离心MAE超过向心MAE。在促进深度运动感知的条件下，尤其是在背景图案最少的情况下，已报道有明显的MAE不对称。预计这种条件会在适应过程中引发运动不对称。在本研究中，观察者在黑暗中单眼观察发光螺旋；他们对旋转期间和之后的深度运动进行计时，并根据可信度进行缩放。旋转期间的深度运动通常几乎是连续的，但后退比前进更令人信服。前进的MAE持续时间更长，比后退的MAE更令人信服：持续时间差异比其他MAE研究中发现的更为明显，证实了MAE不对称与深度运动之间的联系。一种可能的解释思路是将深度螺旋运动与物体实际深度运动进行比较：特别是，螺旋前进缺乏物体实际接近时所具有的快速视觉变化和与观察者的碰撞。文中还讨论了“逼近”和MAE的种间差异。
