| 高速LED背光速视器揭示拓扑性质的快速加工 |
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| 引用本文： | 钱晨灿,刘祖祥.高速LED背光速视器揭示拓扑性质的快速加工[J].生物化学与生物物理进展,2016,43(2):157-166. |
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| 作者姓名： | 钱晨灿 刘祖祥 |
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| 作者单位： | 中国科学院生物物理研究所，脑与认知科学国家重点实验室，北京 100101；中国科学院大学，北京 100049,中国科学院生物物理研究所，脑与认知科学国家重点实验室，北京 100101 |
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| 基金项目： | 国家重点基础研究发展计划(973)(2012CB825500, 2015CB351701), 国家自然科学基金 (91132302)和中国科学院基金 (XDB02010001, XDB02050001)资助项目 |
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| 摘 要： | 灵长类视觉系统能够非常有效地从环境中提取稳定的不变性特征,而不受各种变换与干扰的影响.这种不变性知觉的时间与动态过程为视觉理论提供了重要的约束.我们开发了一种高速发光二极管(LED)背光速视器,能够短暂呈现1 ms的视觉刺激,并以亚毫秒级精度调整刺激呈现时间.这使得我们可以通过控制视觉输入的可获取时间,估计感觉线索积累的心理物理曲线,从而研究在图形结构优势效应任务中,拓扑、射影、仿射和欧氏不变性的相对加工速度.实验结果表明拓扑不变性所需要的呈现时间最短,这与大范围首先理论的预测相一致.
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| 关 键 词： | 图形结构优势效应，拓扑不变性，时间过程，心理物理曲线，速视器 |
| 收稿时间： | 2015/9/29 0:00:00 |
| 修稿时间： | 1/4/2016 12:00:00 AM |
High Speed LED Backlight Tachistoscope Reveals Fast Processing of Topological Invariants |
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| QIAN Chen-Can and LIU Zu-Xiang.High Speed LED Backlight Tachistoscope Reveals Fast Processing of Topological Invariants[J].Progress In Biochemistry and Biophysics,2016,43(2):157-166. |
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| Authors: | QIAN Chen-Can and LIU Zu-Xiang |
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| Institution: | Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China and Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China |
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| Abstract: | Primate visual system is extremely efficient in extracting stable invariants from environment, despite various transformation and degradation. The timing and dynamics of invariants perception provide important constraints for theories of vision. We developed a high speed LED backlight tachistoscope capable to deliver visual stimuli with 1 ms exposure and adjust the duration in submillisecond precision, which enabled us to investigate the relative speed of processing topological, projective, affine, and Euclidean invariants in configural superiority effect paradigm by manipulating the access time to visual input and estimating the psychometric function for sensory evidence accumulation. The results suggest that topological invariant requires shortest exposure time, consistent with the prediction of global-first theory. |
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