...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of vision >Pupil size reflects the strategic allocation of spatial attention
【24h】

Pupil size reflects the strategic allocation of spatial attention

机译：瞳孔大小反映了空间关注的战略配置

获取原文
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Perceptually salient non-targets typically interfere with target processing, but such disruption can be mitigated by top-down knowledge that the salient item is not task-relevant (Geng and DiQuattro, 2010). This exploitation of statistical knowledge optimizes behavior and is thought to be underwritten by locus coeruleus a?? norepinephrine (LC-NE) innervation from neurons in the frontal cortex (Aston-Jones and Cohen, 2005; Minzenberg et al., 2009). The two different modes of LC neuronal firing (i.e., tonic and phasic) are correlated with changes in pupil size, and the shift between these two population conditions mediates the tradeoff between behavioral exploration and exploitation (Gilzenrat et al., 2010). In this study, we investigated the relationship between pupil size and performance on a visual search task in which the probability of the target being perceptually salient was manipulated from block-to-block. Our results demonstrate that when the probability changes (e.g., the ratio of salient target to salient distracters increased from 0:100 to 30:70 to 70:30 to 100:0), a period of uncertainty ensues in which behavior is more variable and the prestimulus pupil diameter increases in size. This suggests that subjects were engaged in exploration of the task statistics during block transitions, but subsequently began to exploit the current paradigm as the new salience probabilities were learned. These results are consistent with the idea that the LC-NE system underlies the tendency to explore or exploit knowledge about environmental structure, and that pupil diameter is a viable measure of perceived task-related uncertainty that influences the strategic allocation of spatial attention.
机译：感知突出的非目标通常会干扰目标处理，但是通过自上而下的知识可以减轻这种破坏，即突出项目不是任务相关的（Geng和Diquattro，2010）。这种统计知识的开发优化了行为，并被认为是由遗迹coeruleus a的承保？ Norepinephrine（LC-NE）额外皮层中神经元的支配（阿斯顿 - 琼斯和科恩，2005; Minzenberg等，2009）。 LC神经元烧制（即滋补和相位）的两种不同模式与瞳孔尺寸的变化相关，这两个人口条件之间的转变介导行为勘探和剥削之间的权衡（Gilzenrat等，2010）。在这项研究中，我们研究了在视觉搜索任务上的瞳孔大小和性能之间的关系，其中从块到嵌段操纵感知纵向突出的目标的概率。我们的结果表明，当概率发生变化时（例如，突出目标与突出的干扰的比率从0：100增加到30:70至70:30至100：0），因此在哪个行为更具变量和行为中的不确定性捕集瞳孔直径的尺寸增加。这表明受试者在块转型期间从事任务统计数据探索，但随后开始利用当前范式作为学习的新推迟概率。这些结果与LC-NE系统倾向于探讨或利用环境结构知识的趋势一致，并且瞳孔直径是对有关的任务相关的不确定性的可行措施，这影响了空间关注的战略配置。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号