Gilden D, Blake R, Hurst G
Department of Psychology, University of Texas at Austin, 78712.
Cogn Psychol. 1995 Feb;28(1):1-16. doi: 10.1006/cogp.1995.1001.
Observers made time-to-contact judgements about an imagined moving object that passed through an area of the visual field previously adapted to a single direction of real motion. The direction of imagined motion varied relative to the direction of adapting motion. When imagined motion was in the same direction as that experienced during adaptation, imagined speed was slowed; when imagined motion was in the opposite direction, its speed was increased; when adaptation and imagined motions were orthogonal, imagined speed was unaffected. The particular influence that prior adaptation has on imagined speed suggests that imagined motion and real vision may engage common neural mechanisms without being functionally equivalent. Negative aftereffects observed in imagined motion imply that the imagination represents movement as an inference from position changes of static images.
观察者对一个想象中的移动物体做出了接触时间判断，该物体穿过了先前适应单一真实运动方向的视野区域。想象运动的方向相对于适应运动的方向而变化。当想象运动与适应过程中经历的方向相同时，想象速度会减慢；当想象运动与适应运动方向相反时，其速度会加快；当适应运动和想象运动相互垂直时，想象速度不受影响。先前适应对想象速度的特定影响表明，想象运动和真实视觉可能涉及共同的神经机制，但在功能上并不等同。在想象运动中观察到的负后效意味着，想象运动将运动表示为对静态图像位置变化的推断。
