不依赖早期视觉皮层可塑性和神经元选择性重加权的知觉学习
其他题名Perceptual learning with minimal roles of early cortical plasticity and neuron-specific response reweighting
Yin-Yu Xie; Cong Yu
2016
会议名称2016年第一届北京视觉科学会议
会议日期2016-07
会议地点北京
会议主办者中国科学院心理研究所
其他摘要PURPOSE: Two theories explain visual perceptual learning (VPL): Early cortical neural plasticity (e.g., Karni & Sagi, 1991; Stoups et al., 2001) and neuron-specific response reweighting (Dosher & Lu, 1987; Law & Gold, 2008), as motivated by observed learning specificities. However, our double training studies (Xiao et al., 2008; Zhang et al., 2010; Wang et al., 2016) demonstrate that VPL often shows complete transfer to untrained locations, orientations/directions, and physical properties, indicating that VPL is primarily a rule-based high-level process operating at a conceptual level. Here we test a hypothesis that VPL requires neither early cortical neural plasticity nor neuron-speci?c response reweighting.
METHODS: In a peripheral orientation-discrimination learning task, training took place with the Gabor stimulus either rotated in 12 locations (anti-clockwise) and 4 orientations 90-deg apart (clockwise), or in a random order. Each location/orientation combination received 2 trials per block of trials, 6 blocks per session, for a total of 60 trials over 5 daily sessions. A staircase controlled the orientation di?erence from condition to condition. The pre/post condition was never practiced.
RESULTS: Both rotating and random training conditions produced significant orientation learning, indicating that the observers can learn orientation discrimination with multiple conditions that minimize neural plasticity in early visual areas and neuron-speci?c response reweighting. Learning transferred to the untrained pre/post location/ orientation condition, so that the improvement was comparable to that in a control group that only practiced the pre/post condition for an equal number of trials. Therefore, orientation learning with multiple stimuli is genuine and unspecific to the more difficult multiple stimulus task. Similar results were seen in a motion-direction learning task with 6 rotating locations and 8 rotating directions 45-deg apart, but without direction/location speci?cities.
CONCLUSIONS: These results indicate that early cortical plasticity and neuron-speci?c input reweighting are unnecessary for VPL. Instead sensory inputs can be reweighted at a later stage in a neuron unspeci?c manner.
关键词visual perceptual learning orientation discrimination early cortical neural plasticity neuron-specific response reweighting
学科领域感知觉心理学
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语种英语
文献类型会议论文
条目标识符http://ir.psych.ac.cn/handle/311026/20784
专题心理所主办学术会议_2016年第一届北京视觉科学会议_会议摘要
作者单位Department of Psychology, IDG/McGovern Institute for Brain Research, and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China, 100871
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Yin-Yu Xie,Cong Yu. 不依赖早期视觉皮层可塑性和神经元选择性重加权的知觉学习[C]. 见:2016年第一届北京视觉科学会议. 北京. 2016-07.http://vision.csp.escience.cn/dct/page/1.
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