DISCRIMINATION OF MOVING GRATINGS AT AND ABOVE DETECTION THRESHOLD
DISCRIMINATION OF MOVING GRATINGS AT AND ABOVE DETECTION THRESHOLD
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DOI：
10.1016/0042-6989(83)90166-9
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发表时间：
1983-01-01
期刊：
影响因子：
1.8
通讯作者：
THOMPSON, P
中科院分区：
文献类型：
--
作者：
THOMPSON, P
两个实验测试了移动栅格的[人体]辨别能力。实验一测量了同方向不同速率漂移的等空间频率光栅的探测阈值和辨别阈值的差异。正如Watson et Robson所发现的，对于反相位调制的光栅，只能做出非常粗略的区分。只有两个标记的通道可以解释在探测阈值下的光栅的速度分辨。实验二考察了阈值以上移动光栅的可识别性。显然，运动速度是由两个宽调的通道来调节的。
Two experiments examined the discriminability of moving gratings [in humans]. Experiment 1 measured the difference between detection and discrimination thresholds for gratings of equal spatial frequency drifting in the same direction at different rates. As Watson et Robson had found with counterphase modulated gratings, only very coarse discriminations could be made. Just 2-labeled channels may account for the velocity discrimination of gratings at detection threshold. The 2nd experiment investigated the discriminability of suprathreshold moving gratings. Apparently, rate of movement is mediated by 2 broadly tuned channels.