Perceptual learning modulates electrophysiological and psychophysical response to visual texture segmentation in humans
Perceptual learning modulates electrophysiological and psychophysical response to visual texture segmentation in humans
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DOI：
10.1016/j.neulet.2004.08.005
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发表时间：
2004-11-16
影响因子：
2.5
通讯作者：
Fuggetta, G
中科院分区：
文献类型：
--
作者：
Casco, C;Campana, G;Fuggetta, G
我们调查的机制，允许通过知觉学习，选择性调制的视觉线条纹理图的显着性，根据任务的相关性。学习依赖性的显着性增加推断增加的准确性与任务重复的方向歧视。作为学习的结果，当纹理图的局部和全局方向发生冲突时，准确性的提高更加明显，并且在冲突和无冲突的条件下都达到了上限。这种心理物理效应与负VEP组件的振幅在全球和本地方向冲突的配置，并在冲突的条件下，VEP的最早的负分量的微弱增加的下降。视觉诱发电位的结果是一个直接的证明，学习，除了增加相关通道的反应，也减少了通道的感受野的大小和方向调整与任务冲突的重量。(C)2004爱思唯尔爱尔兰有限公司保留所有权利。
We investigated the mechanisms that allow, via perceptual learning, selective modulation of a visual line-texture figure saliency in accordance with task relevance. Learning-dependent saliency increase was inferred by increased accuracy in orientation discrimination with task repetition. As a result of learning, accuracy increase was more pronounced when local and global orientation of the texture figure conflicted, and reached ceiling in both conflict and conflict-free conditions. This psychophysical effect was associated with a decrease in amplitude of negative VEP components in the configurations where global and local orientation conflicted, and to a weak increase of VEP's earliest negative component in the conflict-free condition. The VEP result is a direct demonstration that learning, in addition to increasing response of relevant channels, also reduces the weight of channels whose receptive field size and orientation tuning conflict with the task. (C) 2004 Elsevier Ireland Ltd. All rights reserved.