每周论坛之十五（总第128期）：曲折（太阳集团官网）12月19日下午

每周论坛之十五（总第128期）

报告人：曲折 副教授

报告人单位：太阳成集团tyc151cc

题目：The role of top-down spatial attention in contingent attentional capture

时间：2016年12月19日 （周一，13:30-14:30）

地点：太阳集团官网东校园太阳成集团tyc151cc（南学院楼C座）305

报告简介：

It is well known that attentional capture by an irrelevant salient item is contingent on top-down feature selection, but whether attentional capture may be modulated by top-down spatial attention remains unclear. Here, we combined behavioral and ERP measurements to investigate the contribution of top-down spatial attention to attentional capture under modified spatial cueing paradigms. Each target stimulus was preceded by a peripheral circular cue array containing a spatially uninformative color singleton cue. We varied target sets but kept the cue array unchanged among different experimental conditions. When participants’ task was to search for a colored letter in the target array that shared the same peripheral locations with the cue array, attentional capture by the peripheral color cue was reflected by both a behavioral spatial cueing effect and a cue-elicited N2pc component. When target arrays were presented more centrally, both the behavioral and N2pc effects were attenuated but still significant. The attenuated

cue-elicited N2pc was found even when participants focused their attention on the fixed central location to identify a colored letter among an RSVP letter stream. By contrast, when participants were asked to identify an outlined or larger target, neither the behavioral spatial cueing effect nor the cue-elicited N2pc was observed, regardless of whether the target and cue arrays shared same locations or not. These results add to the evidence that attentional capture by salient stimuli is contingent upon feature-based task sets, and further indicate that top-down spatial attention is important but may not be necessary for contingent attentional capture.

报告人简介：

曲折，男，太阳成集团tyc151cc副教授，博士生导师。1998年本科毕业于中国科技大学生物系，2004年博士毕业于中科院研究生院脑与认知科学国家重点实验室。研究领域为认知心理学和认知神经科学，研究方向包括视知觉，注意与意识，语言认知等。具有丰富的EEG/ERP研究经验，擅长ERP实验设计和数据分析。作为第一/通讯作者在Journal of Experimental Psychology: Human Perception and Performance，Cerebral Cortex，Psychophysiology, Vision Research和Scientific Report等国际重要学术期刊上发表多篇研究论文。