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首页> 外文期刊>Neuropsychologia >The timing of feature-based attentional effects during object perception.
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The timing of feature-based attentional effects during object perception.

机译：对象感知过程中基于特征的注意力效应的时机。

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Allocating attention to basic features such as colour enhances perception of the respective features throughout the visual field. We have previously shown that feature-based attention also plays a role for more complex features required for object perception. To investigate at which level object perception is modulated by feature-based attention we recorded high-density event-related potentials (ERPs). Participants detected contour-defined objects or motion, and were informed to expect each feature dimension. Participants perceived contour-defined objects and motion better when they expected the congruent feature. This is consistent with modulation of the P1 when attending to lower-level features. For contours, modulation occurred at 290 ms, first at frontal electrodes and then at posterior sites, associated with sources in ventral visual areas accompanied by greater signal strength. This pattern of results is consistent with what has been observed in response to illusory contours. Our data provide novel insights into the contribution of feature-based attention to object perception that are associated with higher tier brain areas.
机译：对诸如颜色的基本特征的关注增强了整个视野中各个特征的感知。先前我们已经表明，基于特征的注意力对于对象感知所需的更复杂的特征也起作用。为了研究对象感知被基于特征的注意力调制到哪个级别，我们记录了高密度事件相关电位（ERP）。参与者检测到轮廓定义的对象或运动，并被告知期望每个特征尺寸。参与者期望轮廓一致的特征时，他们会更好地感知轮廓定义的对象并运动。这与参加较低级别功能时对P1的调制一​​致。对于轮廓，调制发生在290毫秒，首先在额电极，然后在后部位，与腹侧视觉区域中的信号源相关，并伴随着更大的信号强度。这种结果模式与针对虚幻轮廓观察到的结果一致。我们的数据为基于特征的注意力对与高层大脑区域相关的对象感知的贡献提供了新颖的见解。

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