University of Trier, Trier, Germany.
University of Aberdeen, Aberdeen, UK.
Psychophysiology. 2023 Dec;60(12):e14396. doi: 10.1111/psyp.14396. Epub 2023 Jul 27.
Self-prioritization is a very influential modulator of human information processing. Still, little is known about the time-frequency dynamics of the self-prioritization network. In this EEG study, we used the familiarity-confound free matching task to investigate the spectral dynamics of self-prioritization and their underlying cognitive functions in a drift-diffusion model. Participants (N = 40) repeatedly associated arbitrary geometric shapes with either "the self" or "a stranger." Behavioral results demonstrated prominent self-prioritization effects (SPEs) in reaction time and accuracy. Remarkably, EEG cluster analysis also revealed two significant SPEs, one in delta/theta power (2-7 Hz) and one in beta power (19-29 Hz). Drift-diffusion modeling indicated that beta activity was associated with evidence accumulation, whereas delta/theta activity was associated with response selection. The decreased beta suppression of the SPE might indicate more efficient sensorimotor processing of self-associated stimulus-response features, whereas the increased delta/theta SPE might refer to the facilitated retrieval of self-relevant features across a widely distributed associative self-network. These novel oscillatory biomarkers of self-prioritization indicate their function as an associative glue for the self-concept.
自我优先是人类信息处理中非常有影响力的调制器。尽管如此，人们对自我优先网络的时频动态知之甚少。在这项 EEG 研究中，我们使用了熟悉性混淆自由匹配任务，在扩散模型中研究了自我优先的频谱动态及其潜在的认知功能。参与者（N=40）反复将任意几何形状与“自我”或“陌生人”相关联。行为结果表明，反应时间和准确性都表现出明显的自我优先效应（SPE）。值得注意的是，EEG 聚类分析还揭示了两个显著的 SPE，一个在 delta/theta 功率（2-7 Hz），另一个在 beta 功率（19-29 Hz）。扩散模型表明，beta 活动与证据积累有关，而 delta/theta 活动与反应选择有关。SPE 时 beta 抑制的减少可能表明自我相关刺激-反应特征的感觉运动处理更加有效，而 delta/theta SPE 的增加可能是指自我相关特征在广泛分布的联想自我网络中更容易被检索。这些自我优先的新型振荡生物标志物表明它们作为自我概念的联想胶的功能。
