Murd Carolina, Kreegipuu Kairi, Allik Jüri
Institute of Psychology and the Estonian Center of Behavioral and Health Sciences, University of Tartu, Tiigi 78, Tartu 50410, Estonia.
Perception. 2009;38(11):1649-62. doi: 10.1068/p6145.
The time needed to detect changes in the colouration of a single moving stimulus becomes shorter with its increasing velocity (Kreegipuu et al, 2006 Vision Research 46 1848-1855). We examined the ability to detect colour change in moving chromatic bars or sinusoidal gratings through temporal order judgment (TOJ) and reaction time (RT) tasks to test whether the effect of velocity found in a previous study is universal and holds for different tasks and stimuli. The results demonstrate that the TOJ and simple RT to the colour change of a moving grating are insensitive to stimulus velocity. Therefore, we conclude that the process of comparison of the two internal representations of external events does not have access to temporal information precise enough to estimate the exact time when something enters our subjective awareness. The motion effect on colour-change perception seems to be confined to a single stimulus that moves across the visual field, to events that contain some spatial predictability, and to tasks that reflect the time of the change relatively directly.
检测单个移动刺激颜色变化所需的时间会随着其速度的增加而缩短（Kreegipuu等人，2006年《视觉研究》46卷1848 - 1855页）。我们通过时间顺序判断（TOJ）和反应时间（RT）任务，研究了在移动的彩色条纹或正弦光栅中检测颜色变化的能力，以测试先前研究中发现的速度效应是否具有普遍性，以及是否适用于不同的任务和刺激。结果表明，对移动光栅颜色变化的TOJ和简单RT对刺激速度不敏感。因此，我们得出结论，对外界事件的两种内部表征进行比较的过程无法获取足够精确的时间信息来估计某事物进入我们主观意识的确切时间。运动对颜色变化感知的影响似乎仅限于在视野中移动的单个刺激、包含一定空间可预测性的事件，以及相对直接反映变化时间的任务。
