Turatto Massimo, Vescovi Massimo, Valsecchi Matteo
Department of Cognitive Sciences and Education, Rovereto, Italy.
Vision Res. 2007 Jan;47(2):166-78. doi: 10.1016/j.visres.2006.10.002. Epub 2006 Nov 20.
Although it is well established that attention affects visual performance in many ways, by using a novel paradigm [Carrasco, M., Ling, S., & Read. S. (2004). Attention alters appearance. Nature Neuroscience, 7, 308-313.] it has recently been shown that attention can alter the perception of different properties of stationary stimuli (e.g., contrast, spatial frequency, gap size). However, it is not clear whether attention can also change the phenomenological appearance of moving stimuli, as to date psychophysical and neuro-imaging studies have specifically shown that attention affects the adaptability of the visual motion system. Here, in five experiments we demonstrated that attention effectively alters the perceived speed of moving stimuli, so that attended stimuli were judged as moving faster than less attended stimuli. However, our results suggest that this change in visual performance was not accompanied by a corresponding change in the phenomenological appearance of the speed of the moving stimulus.
虽然人们已经充分认识到注意力在许多方面会影响视觉表现,但通过使用一种新颖的范式[卡拉斯科,M.,凌,S.,&里德,S.(2004年)。注意力改变外观。《自然神经科学》,7,308 - 313。],最近有研究表明,注意力可以改变对静止刺激不同属性的感知(例如,对比度、空间频率、间隙大小)。然而,目前尚不清楚注意力是否也能改变运动刺激的现象学外观,因为迄今为止,心理物理学和神经成像研究特别表明,注意力会影响视觉运动系统的适应性。在此,我们通过五个实验证明,注意力能有效地改变对运动刺激的感知速度,使得被关注的刺激被判断为比较少被关注的刺激移动得更快。然而,我们的结果表明,视觉表现的这种变化并没有伴随着运动刺激速度的现象学外观的相应变化。