Attention and non-retinotopic feature integration
Attention and non-retinotopic feature integration
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DOI：
10.1167/10.12.8
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发表时间：
2010-01-01
影响因子：
1.8
通讯作者：
Herzog, Michael H.
中科院分区：
文献类型：
--
作者：
Otto, Thomas U.;Oegmen, Haluk;Herzog, Michael H.
运动物体的特征是沿着其运动轨迹的非视网膜位置整合的，这一点已被最近的各种研究所证实。非视网膜定位特征整合的机制在很大程度上是未知的。在这里，我们调查的作用，注意在非retinotopic功能整合使用顺序元对比范式。中心线向左或向右偏移。接着是一系列的侧翼线条，引出了两个发散的运动流的概念。虽然中心线是看不见的，但它的偏移在溪流中被感知到。观察员注意到一条溪流。如果偏移被引入到被关注流中的其中一个侧翼线，则该偏移与中心线偏移集成。当偏移量在非参与流中时，不发生集成。在这里，我们操纵的注意力分配使用听觉线索范式。首先，我们表明，强制性的非retinotopic整合发生时，即使是在运动序列后很久的提示。其次，我们使用了两个以上的流，其中两个可以合并。当流合并时，不同流中的偏移被整合。然而，当一个流必须被忽略时，该流的偏移量不被整合。我们提出了一个层次化的两阶段模型，其中运动分组决定强制性的特征集成，而注意力选择运动流进行可选的特征集成。
Features of moving objects are non-retinotopically integrated along their motion trajectories as demonstrated by a variety of recent studies. The mechanisms of non-retinotopic feature integration are largely unknown. Here, we investigated the role of attention in non-retinotopic feature integration by using the sequential metacontrast paradigm. A central line was offset either to the left or right. A sequence of flanking lines followed eliciting the percept of two diverging motion streams. Although the central line was invisible, its offset was perceived within the streams. Observers attended to one stream. If an offset was introduced to one of the flanking lines in the attended stream, this offset integrated with the central line offset. No integration occurred when the offset was in the non-attended stream. Here, we manipulated the allocation of attention by using an auditory cueing paradigm. First, we show that mandatory non-retinotopic integration occurred even when the cue came long after the motion sequence. Second, we used more than two streams of which two could merge. Offsets in different streams were integrated when the streams merged. However, offsets of one stream were not integrated when this stream had to be ignored. We propose a hierarchical two stage model, in which motion grouping determines mandatory feature integration while attention selects motion streams for optional feature integration.