The time-course of auditory and visual distraction effects in a new crossmodal paradigm
The time-course of auditory and visual distraction effects in a new crossmodal paradigm
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DOI：
10.1016/j.neuropsychologia.2010.04.004
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发表时间：
2010-06-01
期刊：
影响因子：
2.6
通讯作者：
Schroeger, Erich
中科院分区：
文献类型：
--
作者：
Bendixen, Alexandra;Grimm, Sabine;Schroeger, Erich
当涉及注意力过程（例如，口技效果）时，视觉通常主导听觉，但人们对这两种方式启动“无人参与的突破”的相对潜力知之甚少。本研究旨在系统地比较与任务无关的听觉和视觉事件将注意力从其他方式转移的能力。听觉和视觉刺激序列以不同量的时间偏移呈现，以确定注意力定向和重新定向的存在、强度和时间过程以及它们对任务相关处理的影响。其中一个流与任务相关，而另一流中意外事件引起的跨模式分心则通过行为任务表现的损害以及事件相关电位 (ERP) 的 N2、P3a 和重新定向负性 (RON) 组成部分来测量。事实证明，视觉模态中的意外事件比听觉模态中的意外事件更为显着，但听觉刺激引起的跨模态干扰更为明显。视觉模态在可以引发分心效应的关键时间范围方面相对受到限制，而听觉刺激对任务相关处理的影响则在更长的时间范围内延伸。这些结果是根据听觉和视觉方式之间的功能差异进行讨论的。鉴于所获得的分散注意力效果相当大，新的跨模式协议的进一步应用被认为是有前途的。 (c) 2010 Elsevier Ltd. 保留所有权利。
Vision often dominates audition when attentive processes are involved (e.g., the ventriloquist effect), yet little is known about the relative potential of the two modalities to initiate a "break through of the unattended". The present study was designed to systematically compare the capacity of task-irrelevant auditory and visual events to withdraw attention from the other modality. Sequences of auditory and visual stimuli were presented with different amounts of temporal offset to determine the presence, strength, and time-course of attentional orienting and reorienting as well as their impact on task-related processing. One of the streams was task-relevant, while crossmodal distraction caused by unexpected events in the other stream was measured by impairments of behavioral task performance and by the N2, P3a, and reorienting negativity (RON) components of the event-related potential (ERP). Unexpected events in the visual modality proved to be somewhat more salient than those in the auditory modality, yet crossmodal interference caused by auditory stimuli was more pronounced. The visual modality was relatively constrained in terms of a critical time-range within which distraction effects could be elicited, while the impact of auditory stimuli on task-related processing extended over a longer time-range. These results are discussed in terms of functional differences between the auditory and visual modalities. Further applications of the new crossmodal protocol are deemed promising in view of the considerable size of the obtained distraction effects. (c) 2010 Elsevier Ltd. All rights reserved.