Attention regulates the plasticity of multisensory timing.

Attention regulates the plasticity of multisensory timing.
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DOI:
10.1111/j.1460-9568.2010.07194.x
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发表时间:
2010-05
期刊:
The European journal of neuroscience
影响因子:
--
通讯作者:
Hanson JV
Hanson JV
中科院分区:
其他
文献类型:
--
作者:
Heron J;Roach NW;Whitaker D;Hanson JV

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有证据表明,人类的时间感知可能反映了最近时间经验的集合。例如,长时间暴露于一致的时间模式可以自适应地重新调整事件顺序的感知,无论是在感官模态之内还是之间。此外,“心急吃不了热豆腐”这一观察结果也说明了这样一个事实,即我们注意力状态的动态变化也会对我们的时间估计产生明显的扭曲。在目前的研究中,我们提供了证据,迄今为止未知的适应,时间知觉和我们的注意力状态之间的联系。我们表明,我们的能力,使用最近的感觉历史作为一个感性的基线正在进行的时间判断是受罢工自上而下的调制通过观察者的选择性注意力的变化。具体而言,出席异步听觉和视觉适应刺激的时间结构产生了大量增加的时间重新校准这些刺激引起的。我们提出了一个概念框架占我们的研究结果,即注意调制感知的时间模式的显着性。这种提高的显着性允许形成视听感知的“对象”,仅由其时间结构定义。重复暴露于这些物体会引起高水平的模式适应效应,类似于视觉和听觉领域中发现的那些。
Evidence suggests than human time perception is likely to reflect an ensemble of recent temporal experience. For example, prolonged exposure to consistent temporal patterns can adaptively realign the perception of event order, both within and between sensory modalities. In addition, the observation that ‘a watched pot never boils’ serves to illustrate the fact that dynamic shifts in our attentional state can also produce marked distortions in our temporal estimates. In the current study we provide evidence for a hitherto unknown link between adaptation, temporal perception and our attentional state. We show that our ability to use recent sensory history as a perceptual baseline for ongoing temporal judgments is subject to striking top-down modulation via shifts in the observer’s selective attention. Specifically, attending to the temporal structure of asynchronous auditory and visual adapting stimuli generates a substantial increase in the temporal recalibration induced by these stimuli. We propose a conceptual framework accounting for our findings whereby attention modulates the perceived salience of temporal patterns. This heightened salience allows the formation of audiovisual perceptual ‘objects’, defined solely by their temporal structure. Repeated exposure to these objects induces high-level pattern adaptation effects, akin to those found in visual and auditory domains.
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