Attentional Facilitation of Constituent Features of an Object Does Not Spread Automatically along Object-defining Cortical Boundaries
Attentional Facilitation of Constituent Features of an Object Does Not Spread Automatically along Object-defining Cortical Boundaries
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DOI：
10.1162/jocn_a_01350
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发表时间：
2019-02-01
影响因子：
3.2
通讯作者：
Mueller, Matthias M.
中科院分区：
文献类型：
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作者：
Brummerloh, Berit;Gundlach, Christopher;Mueller, Matthias M.
整合对象帐户预测，注意力分散在所有功能，构成一个对象，无论其任务的相关性。我们用一种新的刺激技术来挑战这种预测，这种技术允许同时对一个物体内两个不同特征的注意力分配进行电生理测量。一个旋转的正方形，闪烁在不同的颜色引起两个不同的稳态视觉诱发电位（SSVEP）的旋转和颜色，分别。如果综合对象帐户是真的，我们将期待相同的SSVEP振幅，无论参与者参加了什么功能。我们发现更大的SSVEP振幅的被关注的功能相比，被忽略的功能。当参与者注意到这两个功能时，两个功能之间的平均SSVEP幅度显着降低，这反映在行为成本中，这意味着竞争性互动或注意力资源的划分。令人惊讶的是，这种振幅的降低主要是由颜色变化引起的SSVEP振幅驱动的。总之，我们的研究结果挑战了综合对象帐户，并突出了颜色在特征空间内的特殊程度。
The integrated object account predicts that attention is spread across all features that constitute one object, regardless of their task relevance. We challenge that prediction with a novel stimulation technique that allows for simultaneous electrophysiological measurements of the allocation of attention to two distinct features within one object. A rotating square that flickers in different colors evoked two distinct steady-state visual evoked potentials (SSVEPs) for rotation and color, respectively. If the integrated object account were true, we would expect identical SSVEP amplitudes regardless of what feature participants attended. We found greater SSVEP amplitudes for the to-be-attended feature compared with the to-be-ignored feature. SSVEP amplitudes averaged across both features were significantly reduced when participants attended to both features, which was mirrored in behavioral costs, implying competitive interactions or a division of attentional resources. Surprisingly, this reduction in amplitude was mainly driven by the SSVEP amplitude elicited by color changes. In conclusion, our results challenge the integrated object account and highlight the extent to which color is special within feature space.