Effect of attentional load on audiovisual speech perception: evidence from ERPs.
Effect of attentional load on audiovisual speech perception: evidence from ERPs.
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DOI：
10.3389/fpsyg.2014.00727
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发表时间：
2014
影响因子：
3.8
通讯作者：
Tiippana K
中科院分区：
文献类型：
--
作者：
Alsius A;Möttönen R;Sams ME;Soto-Faraco S;Tiippana K
看清发音动作会影响听觉语言的感知。这通常反映在听觉皮质产生的听觉事件相关电位(ERPs)的潜伏期缩短。本研究探讨了视听相互作用的这种早期神经关联是否受到注意的调节。我们记录了15名受试者的事件相关电位，同时向他们展示了听觉、视觉和视听的口语音节。视听刺激由不协调的听觉和视觉成分组成，已知会引起麦格克效应，即听觉言语知觉的视觉驱动改变。在双重任务条件下，参与者被要求识别口语音节，同时监控目标的快速视觉图片流，即他们必须分散注意力。在单一任务条件下，受试者在没有任何其他任务的情况下识别音节，即要求他们忽略图片，将注意力完全集中在所说的音节上。双任务条件下的McGurk效应弱于单任务条件下的McGurk效应，说明注意负荷对视听言语知觉的影响。当注意力完全集中在音节上时，早期听觉ERP成分N1和P2对视听刺激的峰值早于对听觉刺激的峰值，这表明神经生理学视听相互作用。当注意力负荷时，这种潜伏期缩短，这表明注意力影响了视听语音的早期神经处理。我们的结论是，注意力的减少削弱了言语中视觉和听觉之间的相互作用。
Seeing articulatory movements influences perception of auditory speech. This is often reflected in a shortened latency of auditory event-related potentials (ERPs) generated in the auditory cortex. The present study addressed whether this early neural correlate of audiovisual interaction is modulated by attention. We recorded ERPs in 15 subjects while they were presented with auditory, visual, and audiovisual spoken syllables. Audiovisual stimuli consisted of incongruent auditory and visual components known to elicit a McGurk effect, i.e., a visually driven alteration in the auditory speech percept. In a Dual task condition, participants were asked to identify spoken syllables whilst monitoring a rapid visual stream of pictures for targets, i.e., they had to divide their attention. In a Single task condition, participants identified the syllables without any other tasks, i.e., they were asked to ignore the pictures and focus their attention fully on the spoken syllables. The McGurk effect was weaker in the Dual task than in the Single task condition, indicating an effect of attentional load on audiovisual speech perception. Early auditory ERP components, N1 and P2, peaked earlier to audiovisual stimuli than to auditory stimuli when attention was fully focused on syllables, indicating neurophysiological audiovisual interaction. This latency decrement was reduced when attention was loaded, suggesting that attention influences early neural processing of audiovisual speech. We conclude that reduced attention weakens the interaction between vision and audition in speech.
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DOI：
10.1098/rstb.2005.1622
发表时间：
2005-04-29
影响因子：
6.3
作者：
Friston, KJ
通讯作者：
Friston, KJ
影响因子：
56.9
作者：
KUHL, PK;MELTZOFF, AN
通讯作者：
MELTZOFF, AN
影响因子：
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作者：
Calvert, GA;Campbell, R;Brammer, MJ
通讯作者：
Brammer, MJ
影响因子：
3
作者：
Brunelliere, Angele;Sanchez-Garcia, Carolina;Soto-Faraco, Salvador
通讯作者：
Soto-Faraco, Salvador
影响因子：
2
作者：
Alsius, Agnes;Navarra, Jordi;Soto-Faraco, Salvador
通讯作者：
Soto-Faraco, Salvador