Edwards Mark, Grainger Leslie
School of Psychology, Australian National University, Canberra ACT 0200, Australia.
Vision Res. 2006 Sep;46(17):2728-34. doi: 10.1016/j.visres.2006.02.019. Epub 2006 Apr 5.
The effect of signal intensity (proportion of dots moving in the same direction compared to noise dots that move in random directions) on perceived speed was investigated. It was found that increasing signal level decreased the perceived speed of the stimulus. This finding indicates that global-motion pooling processes play a role in the extraction of speed information. It is suggested that the amount of relative motion in the stimulus influences perceived speed, with perceived speed increasing with increasing relative motion. The results are discussed in relation to the notion that speed and direction are processed, at least in part, differently.
研究了信号强度（与随机方向移动的噪声点相比，同向移动的点的比例）对感知速度的影响。结果发现，增加信号水平会降低刺激的感知速度。这一发现表明，全局运动整合过程在速度信息的提取中起作用。研究表明，刺激中的相对运动量会影响感知速度，感知速度随相对运动的增加而增加。结合速度和方向至少在部分程度上以不同方式处理这一观点对结果进行了讨论。
