Stepping out of the spotlight: MMN attenuation as a function of distance from the attended location
Stepping out of the spotlight: MMN attenuation as a function of distance from the attended location
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DOI：
10.1097/00001756-200212030-00009
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发表时间：
2002-12-03
期刊：
影响因子：
1.7
通讯作者：
Alain, C
中科院分区：
文献类型：
--
作者：
Arnott, SR;Alain, C
在这份报告中，我们提出了神经生理学证据，表明有人和无人注意的声源之间的空间分离会影响听者记录注意力焦点之外的声音的变化的能力。在三个方位位置提供了标准刺激和偏离刺激。参与者被要求在任何时候听到指定位置的异常信号时按下一个键。失配负波是在观察位置处产生的，并且对于发生在距离观察位置30度处的偏离波被衰减。在60度或更远的距离上没有观察到失配负值。这一结果与听觉注意的聚光灯模型一致，在该模型中，注意焦点外的刺激的处理随着距离焦点的增加而减弱。
In this report we present neurophysiological evidence that spatial separation between attended and unattended sound sources influences a listener's ability to register changes in sounds presented outside the focus of attention. Standard and deviant stimuli were presented at three azimuth locations. Participants were asked to press a key whenever they heard a deviant at a designated location. Mismatch negativity waves were generated for deviants at the attended location and were attenuated for deviants occurring 30degrees away from the attended location. Mismatch negativities were not observed at distances of 60degrees or more. The results are consistent with a spotlight model of auditory attention in which the processing of stimuli outside the attentional focus is attenuated as a function of increasing distance from the focus.