Attention to touch weakens audiovisual speech integration
Attention to touch weakens audiovisual speech integration
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DOI：
10.1007/s00221-007-1110-1
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发表时间：
2007-11-01
影响因子：
2
通讯作者：
Soto-Faraco, Salvador
中科院分区：
文献类型：
--
作者：
Alsius, Agnes;Navarra, Jordi;Soto-Faraco, Salvador
当语音与相应的发音姿势的视觉相结合时，就会发生人类多感官整合的经典例子之一。尽管长期以来一直假设这种视听结合以无注意力模式运行，但最近的研究结果（Alsius 等人，在 Curr Biol, 15(9):839-843, 2005）表明，当视觉或听觉注意力资源耗尽时，视听语音整合会减少。本研究通过测试当注意力需求施加到不涉及言语感知的感觉域（例如触摸）时是否观察到多感觉整合的类似下降，从而解决了这种注意约束的泛化问题。我们在涉及困难触觉任务的双重任务范式中测量了麦格克错觉。结果表明，当注意力转移到触觉任务时，对视听刺激的视觉影响反应的百分比会降低。这一发现归因于超模态注意力限制介导的对语音视听整合的调节作用。我们认为，注意力系统和跨模式结合机制之间的相互作用可能比以前的研究更加广泛和动态。
One of the classic examples of multisensory integration in humans occurs when speech sounds are combined with the sight of corresponding articulatory gestures. Despite the longstanding assumption that this kind of audiovisual binding operates in an attention-free mode, recent findings (Alsius et al. in Curr Biol, 15(9):839-843, 2005) suggest that audiovisual speech integration decreases when visual or auditory attentional resources are depleted. The present study addressed the generalization of this attention constraint by testing whether a similar decrease in multisensory integration is observed when attention demands are imposed on a sensory domain that is not involved in speech perception, such as touch. We measured the McGurk illusion in a dual task paradigm involving a difficult tactile task. The results showed that the percentage of visually influenced responses to audiovisual stimuli was reduced when attention was diverted to a tactile task. This finding is attributed to a modulatory effect on audiovisual integration of speech mediated by supramodal attention limitations. We suggest that the interactions between the attentional system and crossmodal binding mechanisms may be much more extensive and dynamic than it was advanced in previous studies.