自尊稳定性的认知神经机制：应激-脑-行为的多角度研究

There is accumulating evidence suggesting stability of self-esteem, magnitude of short-term fluctuations of individual’s self-esteem, possesses important psychological functioning. It can not only exert influence on people’s feelings of anger, depression, and well-being, but also moderate the relationship between level of self-esteem and psychological health. However, we still know little about the neural mechanisms underlying stability of self-esteem. Consequently, it is unclear what is the difference or connection between stability of self-esteem and level of self-esteem, and how it modulates people’s state self-esteem. To find the answers to these questions, we first develop an integrated model to conceptualize the relationship among stability of self-esteem, level of self-esteem, and state self-esteem in the perspective of neural information processing. Furthermore, we plan to combine classical psychometry and latest neuroimaging, stress inducing and physiological and biochemical tests to reveal the neural mechanism underlying stability of self-esteem comprehensively and systematically. The current study will contribute to understanding the neural pathway underlying stability of self-esteem and then elucidating the nature behind self-esteem. Hence, it owns important theoretical and practical implications.

自尊稳定性（自尊在短期内波动的幅度）是一种具有重要心理功能的人格特质，它既不同于自尊水平，也区别于情境性自尊，但在理论和测量上却与后两者具有密不可分的联系。然而，由于目前人们对于自尊稳定性的认知神经机制知之甚少，所以并不清楚它与自尊水平在生理机制上的关系是什么，更不了解它会如何调制情境性自尊。鉴于此，本研究计划首次将自尊稳定性、自尊水平和情境性自尊置于整合的认知神经加工模型（应激—脑—行为）之中，通过融合心理测量、脑成像与应激诱发等多种技术指标，力争全方位、多角度揭示自尊稳定性的认知神经机制，及其与自尊水平、情境性自尊间的关系。本申请人拥有十年自尊研究经验，具备社会心理学与认知神经科学交叉的学术研究背景，有能力在规定的时间内顺利完成本研究。本研究的成果将会从广度和深度两个层面提升人们对于自尊稳定性认知神经机制的认识，最终为促进人们心理健康提供科学依据，因此，具有重要的理论价值和实践意义。

自尊稳定性指的是个体整体自尊在短期内波动的幅度，它在定义上区别于自尊水平和情境性自尊，却与后两者密切相关。本项目通过融合心理测量、脑成像与应激诱发等多种技术指标，从多个角度揭示了自尊稳定性的认知神经机制，及其与自尊水平、情境性自尊间的联系和区别，完成了既定研究内容，实现了预期目标，主要研究结果发现：高水平-高稳定自尊和大脑右侧旁海马的低频振幅值显著正相关，同时，功能链接分析结果显示，右侧旁海马的低频振幅与左右额叶显著相关，从而提示默认网络在个体保持高水平-高稳定自尊的过程中扮演重要角色。基于本课题，项目组已出版学术专著2部，以第一（或通讯）作者身份发表英文文章8篇（如Frontiers in Human Neuroscience, Frontiers in Behavioral Neuroscience），发表中文文章3篇（如《心理科学进展》），培养硕士研究生3名（1名已毕业）。本项目通过探明自尊稳定性联合自尊水平调制情境性自尊变化的认知神经通路，将会加深人们对于自尊稳定性作用机制的认识，最终为有效提升心理健康、降低抑郁和愤怒情绪提供理论和实证依据。