AI 中文总结
该研究结合视觉计时任务与SSEPs脑电记录，证实时间填充可减少注意波动，揭示了稳定持续视觉注意的基础神经机制。
AI 中文摘要
我们随时间维持对任务相关目标的专注能力受到限制，因为注意状态会时刻起伏波动。某一理论解释提出，时间填充——即填补目标刺激之间的时间空白间隔——可减少注意波动，以增强持续注意。然而，由于难以通过行为测量追踪注意波动，该假说缺乏直接实证验证。为解决这一缺口，我们将评估时间填充行为益处的视觉计时任务，与视觉稳态诱发电位（SSEPs）的脑电图记录相结合，SSEPs可追踪与节律性视觉序列同步的周期性注意波动相关的神经反应。时间填充带来的持续注意行为改善，与注意波动减少相关，表现为视觉SSEP振幅衰减。这些发现揭示了一种基础神经机制，即时间填充可减少注意波动，从而在较长时间内稳定持续视觉注意。
英文摘要
Our capacity to maintain focus on task-relevant goals over time is constrained because attentional states wax and wane moment to moment. One theoretical account posits that temporal filling-in - filling temporal blank intervals between target stimuli - reduces attentional fluctuations to enhance sustained attention. This proposal, however, lacks direct empirical validation given the difficulty of tracking attentional fluctuations via behavioral measurements. To resolve this gap, we combined a visual timing task that assessed the behavioral benefit of temporal filling-in with electroencephalographic recordings of visual steady-state evoked potentials (SSEPs), which tracked neural responses associated with periodic attentional fluctuations entrained to the rhythmic visual sequence. Behavioral improvements in sustained attention via temporal filling-in were associated with reduced attentional fluctuations, as indexed by attenuated visual SSEP amplitudes. The findings highlight a fundamental neural mechanism whereby temporal filling-in reduces attentional fluctuations to stabilize sustained visual attention over extended periods.
