Visual representation of eye gaze is coded by a nonopponent multichannel system
Visual representation of eye gaze is coded by a nonopponent multichannel system
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DOI：
10.1037/0096-3445.137.2.244
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发表时间：
2008-05-01
影响因子：
4.1
通讯作者：
Clifford, Colin W. G.
中科院分区：
文献类型：
--
作者：
Calder, Andrew J.;Jenkins, Rob;Clifford, Colin W. G.
到目前为止，还没有关于人类注视的视觉感知的功能性解释。先前的工作已经证明，左凝视和右凝视是由不同的机制表示的。然而，这些数据与包括用于不同注视方向的单独通道的多通道系统（例如，左、直接和右），或者其中所有注视方向仅由2个单元池编码的注视编码系统，一个单元池编码左注视，另一个单元池编码右注视，其中直接注视表示为反映左池和右池的相等激活的中性点。在2个实验中，作者使用自适应程序来研究这些模型中的哪一个提供了最佳解释。两个实验都支持多通道编码。先前的研究表明，面部身份是由一个顺从编码系统编码的，因此，这些结果也表明，凝视是由一个不同的表征系统编码的面部身份。
To date, there is no functional account of the visual perception of gaze in humans. Previous work has demonstrated that left gaze and right gaze are represented by separate mechanisms. However, these data are consistent with either a multichannel system comprising separate channels for distinct gaze directions (e.g., left, direct, and right) or an opponent-coding system in which all gaze directions are coded by just 2 pools of cells, one coding left gaze and the other right, with direct gaze represented as a neutral point reflecting equal activation of both left and right pools. In 2 experiments, the authors used adaptation procedures to investigate which of these models provides the optimal account. Both experiments supported multichannel coding. Previous research has shown that facial identity is coded by an opponent-coding system; hence, these results also demonstrate that gaze is coded by a different representational system to facial identity.