The N1 effect of temporal attention is independent of sound location and intensity: implications for possible mechanisms of temporal attention.
The N1 effect of temporal attention is independent of sound location and intensity: implications for possible mechanisms of temporal attention.
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DOI：
10.1111/j.1469-8986.2012.01460.x
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发表时间：
2012-10
期刊：
影响因子：
3.7
通讯作者：
K. Lange
中科院分区：
文献类型：
--
作者：
K. Lange
它已被反复表明，听觉N1增强的声音在关注的时间点。本研究采用时间线索范式探讨了其内在机制。在每次试验中，听觉线索表明在哪个时间点第二个声音可能与反应选择相关。至关重要的是，除了时间注意力，两个物理声音功能与已知的影响感官N1操纵：位置和强度。注意力和位置或注意力和强度的联合效应的积极证据将证实的概念，即感官N1调制的时间注意，从而支持增益机制。然而，N1效应的时间注意不类似偏侧的感觉N1，而且，它是独立的声音强度。因此，目前的研究结果并没有提供令人信服的证据表明，时间注意涉及感官增益的增加。
It has been repeatedly shown that the auditory N1 is enhanced for sounds presented at an attended time point. The present study investigated the underlying mechanisms using a temporal cuing paradigm. In each trial, an auditory cue indicated at which time point a second sound could be relevant for response selection. Crucially, in addition to temporal attention, two physical sound features with known effects on the sensory N1 were manipulated: location and intensity. Positive evidence for conjoint effects of attention and location or attention and intensity would corroborate the notion that the sensory N1 was modulated by temporal attention, thus supporting a gain mechanism. However, the N1 effect of temporal attention was not similarly lateralized as the sensory N1, and, moreover, it was independent of sound intensity. Thus, the present results do not provide compelling evidence that temporal attention involves an increase in sensory gain.