THE TIME-COURSE OF LEARNING A VISUAL SKILL
THE TIME-COURSE OF LEARNING A VISUAL SKILL
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DOI：
10.1038/365250a0
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发表时间：
1993-09-16
期刊：
影响因子：
64.8
通讯作者：
SAGI, D
中科院分区：
文献类型：
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作者：
KARNI, A;SAGI, D
经验依赖性知觉改善（知觉学习）的几个例子表明，特定神经元位点的可塑性可能是学习过程的基础1 -6。对于一个基本的视觉辨别任务（使用一个最佳的刺激“自动”预注意纹理分离7 -10），离散的视网膜输入依赖的变化在视觉处理流的非常早期的阶段被指示为一个大的和一致的学习效果的轨迹5。这些变化是什么时候发生的？在这里，我们报告说，除了一个快速，迅速饱和的改善早期的第一次练习，性能是非常稳定的会议。事实上，观察者在最后一次训练后8小时（潜伏期）内几乎没有改善。但此后出现了很大的改善。最后，几乎没有遗忘;所获得的至少保留了2-3年。我们推测，某些类型的知觉经验触发永久性的神经变化在早期处理阶段的成人视觉系统。这些可能需要几个小时才能发挥作用。
SEVERAL examples of experience-dependent perceptual improvement (perceptual learning) suggest that plasticity in specific neuronal loci could underlie the learning process1-6. For a basic visual discrimination task (using an optimal stimulus for 'automatic' pre-attentive texture segregation7-10), discrete retinal input-dependent changes within a very early stage in the stream of visual processing were indicated as the locus of a large and consistent learning effect5. When do these changes occur? Here we report that except for a fast, rapidly saturating improvement early in the first practice session, performance was very stable within sessions. Indeed, observers showed little or no improvement until up to 8 hours after their last training session (latent phase). But large improvements occurred thereafter. Finally, there was almost no forgetting; what was gained was retained for at least 2-3 years. We conjecture that some types of perceptual experience trigger permanent neural changes in early processing stages of the adult visual system. These may take many hours to become functional.