Modality-specific selective attention attenuates multisensory integration
Modality-specific selective attention attenuates multisensory integration
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DOI：
10.1007/s00221-007-1080-3
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发表时间：
2008-01-01
影响因子：
2
通讯作者：
Laurienti, Paul J.
中科院分区：
文献类型：
--
作者：
Mozolic, Jennifer L.;Hugenschmidt, Christina E.;Laurienti, Paul J.
在时间上同步或空间上一致的多个感觉模态中发生的刺激可以被整合在一起以增强感知。此外，刺激的语义内容或含义可以影响跨模态交互，当这些刺激传达语义一致或匹配信息时，可以提高任务性能，但当它们包含不匹配或分散注意力的信息时，会损害性能。注意是一种已知的通过增强对任务相关信息的感知和抑制对任务无关刺激的感知来改变感觉刺激的处理的机制。然而，目前还不知道在多大程度上注意到一个单一的感觉模态可以最大限度地减少刺激的影响，在无人看管的感觉模态，并减少跨多个感觉模态的刺激的整合。我们的假设是，模态特定的选择性注意将限制处理的刺激在无人看管的感觉模态，导致减少的性能增强所产生的语义匹配的多感官刺激，并减少在性能递减所产生的语义不匹配的多感官刺激。利用线索歧视任务的两个实验的结果表明，选择性注意到一个单一的感官形式，防止整合匹配的多感官刺激，通常观察到的注意力时，分为感官形式。注意力并没有可靠地改变不匹配的多感官刺激对这项任务所造成的分心量，然而，这些研究结果强调了特定于模态的选择性注意力在调节多感官整合中的关键作用。
Stimuli occurring in multiple sensory modalities that are temporally synchronous or spatially coincident can be integrated together to enhance perception. Additionally, the semantic content or meaning of a stimulus can influence cross-modal interactions, improving task performance when these stimuli convey semantically congruent or matching information, but impairing performance when they contain non-matching or distracting information. Attention is one mechanism that is known to alter processing of sensory stimuli by enhancing perception of task-relevant information and suppressing perception of task-irrelevant stimuli. It is not known, however, to what extent attention to a single sensory modality can minimize the impact of stimuli in the unattended sensory modality and reduce the integration of stimuli across multiple sensory modalities. Our hypothesis was that modality-specific selective attention would limit processing of stimuli in the unattended sensory modality, resulting in a reduction of performance enhancements produced by semantically matching multisensory stimuli, and a reduction in performance decrements produced by semantically non-matching multisensory stimuli. The results from two experiments utilizing a cued discrimination task demonstrate that selective attention to a single sensory modality prevents the integration of matching multisensory stimuli that is normally observed when attention is divided between sensory modalities. Attention did not reliably alter the amount of distraction caused by non-matching multisensory stimuli on this task; however, these findings highlight a critical role for modality-specific selective attention in modulating multisensory integration.