Reduction in the motion coherence threshold for the same direction as that perceived during adaptation
Reduction in the motion coherence threshold for the same direction as that perceived during adaptation
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降低与适应过程中感知的方向相同方向的运动相干阈值
DOI：
10.1016/j.visres.2006.09.008
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发表时间：
2006
期刊：
影响因子：
1.8
通讯作者：
M. Hirahara
中科院分区：
文献类型：
--
作者：
M. Hirahara
当等距平行线的刺激在垂直于线的方向上稍微移位时，可以感知朝向移位方向的低速运动。这样的刺激体现了在相反方向上的低速和高速分量。前者的优势将导致低速运动的感知。为了了解视觉系统如何处理未感知的高速分量，我测量了随机点测试运动的相干阈值，并事先适应等间距平行线的低速运动。结果取决于测试速度。在低速下，在适应阶段感知到的相同方向的相干阈值增加，相反方向的相干阈值降低。在高速下，同样的适应导致了相反的效果。在与在适应阶段期间感知的方向相同的方向上的高速运动的阈值降低和在相反方向上的阈值升高可能是由于高速处理通道对未感知但仍然检测到的高速分量的适应。
When a stimulus of equally spaced parallel lines is displaced slightly in a direction perpendicular to the lines, low-speed motion toward the displacement direction can be perceived. Such a stimulus embodies both a low-speed and a high-speed component in opposite directions. The dominance of the former would result in the perception of low-speed motion. To see how the unperceived high-speed component is processed by the visual system, I measured coherence thresholds for random-dot test-motion with and without prior adaptation to the low-speed motion of the equally spaced parallel lines. The results depended on the test speeds. At low speeds, the coherence thresholds for the same direction as that perceived during the adaptation phase increased and the coherence thresholds for the opposite direction decreased. At high speeds, the same adaptation resulted in an opposite effect. The threshold reduction for high-speed motion in the same direction as that perceived during the adaptation phase and the threshold elevation in the opposite direction might be due to adaptation of a high-speed processing channel to the high-speed component that was not perceived but was nevertheless detected.
DOI：
10.1073/pnas.89.19.9025
发表时间：
1992-10-01
影响因子：
11.1
作者：
HIRIS, E;BLAKE, R
通讯作者：
BLAKE, R