心理学学术沙龙

题目：Impact of eye-movements and parafoveal preview on EEG correlates of word recognition: A comparison between natural reading and RSVP (词汇加工过程中眼动和预视加工相关的EEG效应：来自自然阅读和快速序列呈现的比较研究)

主讲人: Florian Niefind (Humboldt University Berlin, 德国洪堡大学)

时间：12月05日（周四）下午4点到5点

地点：心理学院大楼301会议室

内容简介：

Visual word recognition (VWR) naturally takes place under reading conditions that involve eye movements and parafoveal preprocessing of the upcoming word. Event-related potential (ERP) studies have usually neglected both aspects when studying VWR with serial visual presentation (SVP). Recently, it was suggested that preview can be studied by presenting parafoveal flanker words during SVP. An alternative method is to let participants read naturally and time-lock the EEG to the onsets of fixations, yielding fixation-related potentials (FRPs). This study combined eye tracking and EEG to compare both approaches. Participants read lists of nouns of varying lexical frequency. In FRP blocks, lists were read naturally from left to right. In ERP blocks, subjects maintained fixation while lists moved word-by-word through foveal vision at a reading speed closely matching the FRP condition. In both paradigms, parafoveal words were either visible or masked with x-letters. Classic effects of word frequency were replicated across conditions. Importantly, the availability of correct previews strongly modulated the waveshapes of both ERPs and FRPs. However, these preview effects were substantially larger in natural reading, presumably because attention is shifted to upcoming words during saccade preparation. Results underline the importance of considering saccades and preview in electrophysiological VWR research.