Sigman M, Gilbert C D
The Rockefeller University, 1230 York Avenue, New York, New York 10021-6399, USA.
Nat Neurosci. 2000 Mar;3(3):264-9. doi: 10.1038/72979.
We studied the transition of stimuli from novel to familiar in visual search and in the guidance of attention to a particular object. Ability to identify an object improved dramatically over several days of training. The learning was specific for the object's position in the visual field, orientation and configuration. Improvement was initially localized to one or two positions near the fixation spot and then expanded radially to include the full area of the stimulus array. Characteristics of this learning process may reflect a shift in the cortical representation of complex features toward earlier stages in the visual pathway.
我们研究了视觉搜索中刺激从新颖到熟悉的转变，以及对特定物体的注意力引导。在几天的训练中，识别物体的能力显著提高。这种学习针对物体在视野中的位置、方向和形态具有特异性。最初，改善局限于注视点附近的一两个位置，然后呈放射状扩展，涵盖刺激阵列的整个区域。这一学习过程的特征可能反映了复杂特征的皮层表征向视觉通路早期阶段的转变。
