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首页> 外文期刊>The European Journal of Neuroscience >Split of spatial attention as predicted by a systems-level model of visual attention.
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Split of spatial attention as predicted by a systems-level model of visual attention.

机译：由系统级别的视觉注意力模型预测的空间注意力的分裂。

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Can we attend to multiple distinct spatial locations at the same time? According to a recent psychophysical study [J. Dubois et al. (2009)Journal of Vision, 9, 3.1-11] such a split of spatial attention might be limited to short periods of time. Following N. P. Bichot et al. [(1999)Perception & Psychophysics, 61, 403-423] subjects had to report the identity of multiple letters that were briefly presented at different locations, while two of these locations (targets) were relevant for a concurrent shape comparison task. In addition to the design used by Bichot et al. stimulus onset asynchrony between shape onset and letters was systematically varied. In general, the performance of subjects was superior at target locations. Furthermore, for short stimulus onset asynchronies, performance was simultaneously increasing at both target locations. For longer stimulus onset asynchronies, however, performance deteriorated at one of the target locations while increasing at the other target location. It was hypothesized that this dynamic deployment of attention might be caused by competitive processes in saccade-related structures such as the frontal eye field. Here we simulated the task of Dubois et al. using a systems-level model of attention. Our results are consistent with recent findings in the frontal eye field obtained during covert visual search, and they support the view of a transient deployment of spatial attention to multiple stimuli in the early epoch of target selection.
机译：我们可以同时参加多个不同的空间位置吗？根据最近的一项心理物理研究[J. Dubois等。 （2009）Journal of Vision，9，3.1-11]这样的空间注意力的分裂可能仅限于短时间。继N.P. Bichot等。 [（1999）Perception＆Psychophysics，61，403-423]受试者必须报告在不同位置简短呈现的多个字母的身份，而其中两个位置（目标）与同时进行的形状比较任务相关。除了Bichot等人使用的设计。形状发作和字母之间的刺激发作异步是系统地变化的。通常，对象在目标位置的表现优异。此外，对于短暂的刺激发作异步性，两个目标位置的性能均同时提高。但是，对于较长的刺激起步异步性，目标位置之一的性能会下降，而另一个目标位置的性能会下降。据推测，注意力的这种动态部署可能是由与眼球相关的结构（如额眼）中的竞争过程引起的。在这里，我们模拟了Dubois等人的任务。使用系统级别的注意力模型。我们的研究结果与隐性视觉搜索过程中在额眼视野中的最新发现是一致的，并且它们支持在目标选择的早期将注意力转移到多个刺激上的观点。

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