Serial grouping of 2D-image regions with object-based attention in humans
Serial grouping of 2D-image regions with object-based attention in humans
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DOI：
10.7554/elife.14320
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发表时间：
2016-06-13
期刊：
影响因子：
7.7
通讯作者：
Roelfsema, Pieter R.
中科院分区：
文献类型：
--
作者：
Jeurissen, Danique;Self, Matthew W.;Roelfsema, Pieter R.
在视网膜和早期视觉通路内的局部分析的初始阶段之后，人类视觉系统通过共同选择作为行为相关对象的一部分的图像元素来创建视觉场景的结构化表示。这种知觉组织过程的机制只被部分理解。在这里，我们调查的时间过程中的感知分组的二维图像区域通过测量人类参与者的反应时间，并报告说，它是与基于对象的注意力的逐渐蔓延。注意力在大而均匀的区域传播得最快，在需要小规模处理的位置传播得较慢。我们发现，基于对象的选择过程的时间过程是很好地解释了一个“生长锥”模型，它选择表面元素的增量，规模依赖的方式。我们讨论了视觉皮层层次结构如何实现这种基于对象的注意力的规模依赖性传播，利用不同的皮层区域中不同的感受野大小。
After an initial stage of local analysis within the retina and early visual pathways, the human visual system creates a structured representation of the visual scene by co-selecting image elements that are part of behaviorally relevant objects. The mechanisms underlying this perceptual organization process are only partially understood. We here investigate the time-course of perceptual grouping of two-dimensional image-regions by measuring the reaction times of human participants and report that it is associated with the gradual spread of object-based attention. Attention spreads fastest over large and homogeneous areas and is slowed down at locations that require small-scale processing. We find that the time-course of the object-based selection process is well explained by a 'growth-cone' model, which selects surface elements in an incremental, scale dependent manner. We discuss how the visual cortical hierarchy can implement this scale dependent spread of object-based attention, leveraging the different receptive field sizes in distinct cortical areas.