题 目:Fading and Filling-in in Human Perception
(人类知觉的消退与填充)
主讲人:Lothar Spillmann(弗莱堡大学教授)
时 间:2018年3月29日(星期四)上午10:00-11:00
地 点:心理学院201室
报告人简介:
Lothar Spillmann教授在弗莱堡大学获博士学位,1964年入麻省理工学院任研究助理,1971年就职于弗莱堡大学。后在达特茅斯学院、中国香港大学、中国科学院等研究机构任客座教授。主要研究方向是:使用多种认知神经科学的方法研究视知觉、视神经科学等,具体包括运动知觉、颜色知觉、错觉等内容。其论文发表在《Trends in Neurosciences》,《Human Brain Mapping》,《Journal of Neuroscience》,《Psychological Science》等高水平杂志上。
更多详细信息见:
http://www.lothar-spillmann.de/Lothar_Spillmann/Curriculum_Vitae.html
讲座提要:
Since Troxler's original observation in 1804, fading and filling-in phenomena have aroused the interest of researchers and have been systematically studied only during the last 30 years. Fading is due to local adaptation and is comparable to a stimulus lowered to subthreshold. When a percept fades, the void may be replaced by properties from the surrounding background. This is called filling-in.We have found that filling-in of the blind spot requires relatively little surround information. Psychophysical and neurophysiological experiments suggest that filling-in is achieved by long-range horizontal interaction beyond the classical receptive field. Candidates are visual areas V1-3.
(自1804年Troxler的原始观察以来,消退和填充现象引起了研究人员的兴趣,并且仅在过去的30年就进行了系统研究。消退是由于局部适应引起的,类似于刺激降低到亚阈值。当感知消失时,空白可能会被周围背景的属性所取代。这就是所谓的填充。我们发现盲点的填充需要相对较少的环境信息。心理物理学和神经生理学实验表明,填充是通过长期水平相互作用超越经典感受野来实现的。)