Perceptual learning of spatial localization: Specificity for orientation, position, and context
Perceptual learning of spatial localization: Specificity for orientation, position, and context
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DOI：
10.1152/jn.1997.78.6.2889
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发表时间：
1997-12-01
影响因子：
2.5
通讯作者：
Gilbert, CD
中科院分区：
文献类型：
--
作者：
Crist, RE;Kapadia, MK;Gilbert, CD
简单视觉属性的辨别力可以通过练习得到显著提高。我们已经训练了人类观察员执行外围呈现的任务，涉及短线段的本地化，并研究了学习的视觉位置，方向和几何排列的训练刺激的特异性。几周的训练导致了阈值的急剧下降。学习是特定的方向和位置的训练刺激，表明参与的最早的皮质阶段的视觉通路中的方向和位置的刺激映射最高的分辨率。此外，改善也是具体的配置的训练刺激和属性的刺激，在训练过程中受到审查。这种程度的特异性表明，学习不能单独通过皮质募集来实现，正如目前的模型所提出的那样，但可能涉及皮质内横向相互作用的细化，并可能通过注意力机制对较低水平的变化进行门控。
Discrimination of simple visual attributes can improve significantly with practice. We have trained human observers to perform peripherally presented tasks involving the localization of short line segments and examined the specificity of the learning for the visual location, orientation, and geometric arrangement of the trained stimulus. Several weeks of training resulted in dramatic threshold reductions. The learning was specific for the orientation and location of the trained stimulus, indicating the involvement of the earliest cortical stages in the visual pathway where the orientation and location of stimuli are mapped with highest resolution. Furthermore, improvement was also specific for both the configuration of the trained stimulus and the attribute of the stimulus that was under scrutiny during training. This degree of specificity suggests that the learning cannot be achieved by cortical recruitment alone, as proposed in current models, but is Likely to involve a refinement of lateral interactions within the cortex and possibly a gating of lower level changes by attentional mechanisms.