Task-dependent changes of the psychophysical motion-tuning functions in the course of perceptual learning
Task-dependent changes of the psychophysical motion-tuning functions in the course of perceptual learning
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DOI：
10.1068/p5195
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发表时间：
2004-01-01
期刊：
影响因子：
1.7
通讯作者：
Watanabe, T
中科院分区：
文献类型：
--
作者：
Koyama, S;Harner, A;Watanabe, T
在某些情况下，知觉学习是特定于任务的。然而，知觉学习对心理物理运动调节功能的任务依赖效应尚不清楚。在本研究中，受试者在不同天举行的四次会议中对相同刺激进行运动检测或辨别。进行运动检测的受试者在训练后的运动方向上表现出最大的进步。然而，辨别训练后，最大的进步并没有出现在训练方向上，而是偏离了训练方向。这些结果可以用侧向抑制来解释。任务需求可以将兴奋和抑制信号差分调制到训练方向附近的方向。
In some cases, perceptual learning is task-specific. However, task-dependent effects of perceptual learning on psychophysical motion-tuning functions have yet to be clarified. In the present study, subjects performed motion detection or discrimination of the same stimulus over the course of four sessions held on separate days. Subjects who performed motion detection showed the most highly improved performance on the trained motion directions. However, after discrimination training, the highest improvement was not observed at the trained directions but shifted away from them. These results can be explained by lateral inhibition. Task demands may differentially modulate excitatory and inhibitory signals to directions in the vicinity of the trained directions.