Object continuity enhances selective auditory attention
Object continuity enhances selective auditory attention
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DOI：
10.1073/pnas.0803718105
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发表时间：
2008-09-02
影响因子：
11.1
通讯作者：
Shinn-Cunningham, Barbara G.
中科院分区：
文献类型：
--
作者：
Best, Virginia;Ozmeral, Erol J.;Shinn-Cunningham, Barbara G.
在复杂的场景中，听觉对象的身份可以在几秒钟内建立起来。考虑到注意力作用于感知对象，这种感知积累可能会随着时间的推移而改变选择性听觉注意力的功效。在这里，我们测量识别一系列的口头目标数字与干扰数字从其他方向调查选择性注意的动态。当目标位置固定而不是在数字之间变化时，性能更好，即使听众提前1秒提示每个后续数字的位置。空间连续性不仅避免了众所周知的成本与切换空间注意力的焦点，但也产生了跨时间的注意力的空间选择性的细化。目标声音的连续性进一步增强了这种选择性注意的积累。结果表明，当注意力持续在一个复杂的场景中的一个听觉对象，注意力的选择性随着时间的推移而提高。当注意力持续集中在复杂视觉场景中的物体上时，类似的效果可能会发挥作用，特别是在视觉物体的形成需要持续注意的情况下。
In complex scenes, the identity of an auditory object can build up across seconds. Given that attention operates on perceptual objects, this perceptual buildup may alter the efficacy of selective auditory attention overtime. Here, we measured identification of a sequence of spoken target digits presented with distracter digits from other directions to investigate the dynamics of selective attention. Performance was better when the target location was fixed rather than changing between digits, even when listeners were cued as much as 1 s in advance about the position of each subsequent digit. Spatial continuity not only avoided well known costs associated with switching the focus of spatial attention, but also produced refinements in the spatial selectivity of attention across time. Continuity of target voice further enhanced this buildup of selective attention. Results suggest that when attention is sustained on one auditory object within a complex scene, attentional selectivity improves over time. Similar effects may come into play when attention is sustained on an object in a complex visual scene, especially in cases where visual object formation requires sustained attention.