视觉脉冲刺激对工作记忆表征引导注意的影响
The Effect of Visual Impulses on Attentional Guidance by Working Memory Representations
车晓玮 1李晓松 1刘李昂 1连浩敏2
作者信息
- 1. 山东省脑科学与心理健康重点实验室;山东师范大学心理学部
- 2. 山东省脑科学与心理健康重点实验室;山东师范大学心理学部;山东司法警官职业学院
- 折叠
摘要
工作记忆(WM)表征的存储是动态变化的, 这种动态变化如何影响视觉搜索尚不清楚。本研究通过在保持阶段呈现视觉脉冲刺激操纵WM表征激活, 探讨注意捕获范式下WM表征存储动态对注意引导的影响。结果发现, 呈现视觉脉冲刺激时基于WM的注意捕获效应低于不呈现该刺激; 视觉脉冲刺激呈现早时, 基于WM的注意捕获效应高于视觉脉冲刺激呈现晚和不呈现视觉脉冲刺激时。脑电解码发现, 呈现视觉脉冲刺激后, WM表征得到激活, 但随后被抑制, 同时自额顶区向枕区的Granger因果增强; 被抑制时段内表征解码正确率与基于WM的注意捕获效应负相关。研究表明, 视觉脉冲刺激可以激活WM表征, 且自上而下的认知控制及时抑制表征激活, 避免被动激活的表征捕获注意。
Abstract
Working memory (WM) representations can be maintained in either active or silent states, each of which plays a distinct role in modulating WM-dependent behavior. During visual search, target representations are kept active to facilitate attentional guidance, whereas task-irrelevant information is generally stored silently and rarely influences search performance. Neurocognitive evidence indicates that WM representations can dynamically transition between active and latent states, and that silent WM representations can be reactivated. However, how these neural dynamics affect attentional guidance remains largely unexplored.In this study, we combined behavioral measures, event-related potentials (ERPs), and electroencephalogram (EEG) decoding techniques to investigate how the dynamic activation of WM representations influences visual search. Participants were required to maintain a color in WM and then perform either a memory test or a gaplocation search task. The memorized color could match the distractors in the search task, and the probability of memory testing was low, rendering the color representation low-priority. The activation state of WM representations was manipulated by inserting visual impulses into the maintenance interval. In Experiment 1, the presence of visual impulses was manipulated to examine whether the activation of WM representation affects WM-based attentional capture. In Experiment 2, the onset time of the visual impulses was manipulated to explore how the time of WM reactivation influences WM-based attentional capture. In Experiment 3, EEG decoding accuracy, which reflects the activation level of WM representations, and Granger Causality, which reflects directional influences between brain regions, were analyzed to uncover the neural mechanisms through which representation activation and cognitive control affect visual search.Behavioral results from Experiments 1 and 3 revealed a reduced WM-based attentional capture effect when a visual impulse was present compared to when it was absent. In Experiment 2, the attentional capture effect was larger when the visual impulse was presented early rather than late or not presented at all. EEG decoding results showed that in the absence of a visual impulse, WM representations were activated (as indicated by above-chance decoding accuracy) both before and after the onset of the search task, and the decoding accuracy after the onset of the search task positively correlated with the WM-based attentional capture effect. When a visual impulse was present, WM representations were initially activated, but then suppressed, and they were not reactivated after the onset of the search task. During the early activation phase, decoding accuracy positively correlated with the attentional capture effect, whereas during the subsequent suppression period, decoding accuracy negatively correlated with the attentional capture effect. Moreover, the presence (vs. absence) of the visual impulse enhanced the -band connectivity from the prefrontal regions to the occipital lobe, and the strength of this connectivity was positively correlated with the subsequent decoding decrease and negatively correlated with the attentional capture effect.In summary, high-contrast visual impulses can reactivate representations maintained in an activity-silent state. This attentional guidance by the dynamic activation of WM representations might be modulated by top-down cognitive control, late reactivation allows suppression to persist in the search task, thereby reducing WM-based attentional capture, whereas early reactivation may enhance attentional capture.关键词
神经表征/注意捕获/认知控制/工作记忆/动态加工Key words
neural representation/attentional capture/cognitive control/working memory/dynamic process引用本文复制引用
车晓玮,李晓松,刘李昂,连浩敏.视觉脉冲刺激对工作记忆表征引导注意的影响[EB/OL].(2026-07-12)[2026-07-14].https://chinaxiv.org/abs/202607.00111.学科分类
生物科学研究方法、生物科学研究技术
