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1. chinaXiv:201901.00102 [pdf]

第三方惩罚的神经机制:来自经颅直流电刺激的证据

殷西乐; 李建标; 陈思宇; 刘晓丽; 郝洁
分类: 心理学 >> 实验心理学

第三方惩罚既是社会规范在群体得以维系的基石,也是个体维护社会规范的体现。当前关注社会规范的神经研究大多基于第二方惩罚的独裁者或最后通牒实验框架,缺乏对第三方维护社会规范过程中相关脑区活动的探索,对这一过程的内在神经机制也不清楚。本文基于第三方惩罚的独裁者博弈框架,对右侧背外侧前额叶区域(DLPFC)进行不同极性的经颅直流电刺激(tDCS),同时依据第三方是否需要为其惩罚付出成本设计了零成本和有成本两个实验任务。结果发现,第三方在零成本任务的情绪反应和惩罚显著受到tDCS设置的影响,且阴极刺激显著提升了第三方的惩罚值,这表明情绪机制对第三方惩罚有着重要影响。另外,第三方在零成本和有成本任务中的惩罚差异在不同tDCS设置之间也存在显著差异,这与第三方惩罚还受到自利机制影响的观点相符。本文率先为右侧DLPFC活动影响第三方惩罚提供了神经层面的证据,且支持了第三方对社会规范的遵从与其负性情绪反应和自利加工密切相关的机制解释。

提交时间: 2019-01-14 点击量51下载量9 评论 0

2. chinaXiv:201801.00701 [pdf]

唤醒度对自我优势的调节

钱浩悦; 王治国; 李超; 高湘萍
分类: 心理学 >> 实验心理学

最近的研究表明自我偏向被情绪状态所调节。但是,这种调节背后的原因是效价还是唤醒度还不清楚。在实验1中,我们测了四种情绪下的自我偏向效应大小。结果显示,在高唤醒度条件下自我偏向较高,且自我偏向与唤醒度成正比。实验2的结果显示,警觉线索的出现会提高唤醒度,进而提升自我偏向效应。这些结果表明唤醒度能够调节自我偏向性加工。

提交时间: 2018-01-12 点击量2572下载量891 评论 0

3. chinaXiv:201711.00278 [pdf]

PRN: a preprint service for catalyzing R-fMRI and neuroscience related studies

Chao-Ganyan; Qingyang Li; Lei Gao
分类: 心理学 >> 实验心理学

Sharing drafts of scientific manuscripts on preprint hosting services for early exposure and pre-publication feedback is a well-accepted practice in fields such as physics, astronomy, or mathematics. The field of neuroscience, however, has yet to adopt the preprint model. A reason for this reluctance might partly be the lack of central preprint services for the field of neuroscience. To address this issue, we announce the launch of Preprints of the R-fMRI Network (PRN), a community funded preprint hosting service. PRN provides free-submission and free hosting of manuscripts for resting state functional magnetic resonance imaging (R-fMRI) and neuroscience related studies. Submissions will be peer viewed and receive feedback from readers and a panel of invited consultants of the R-fMRI Network. All manuscripts and feedback will be freely available online with citable permanent URL for open-access. The goal of PRN is to supplement the “peer reviewed” journal publication system – by more rapidly communicating the latest research achievements throughout the world. We hope PRN will help the field to embrace the preprint model and thus further accelerate R-fMRI and neuroscience related studies, eventually enhancing human mental health.

提交时间: 2017-11-06 点击量1984下载量700 评论 0

4. chinaXiv:201711.00274 [pdf]

Concordance Among Indices of Intrinsic Brain Function:Inter-Individual Variation and Temporal Dynamics Perspectives

Chao-Gan Yan; Zhen Yang; Stanley J. Colcombe; Xi-Nian Zuo; Michael P. Milham
分类: 心理学 >> 实验心理学

Various resting-state fMRI (R-fMRI) measures have been developed to characterize intrinsic brain activity. While each of these measures has gained a growing presence in the literature, questions remain regarding the common and unique aspects these indices capture. The present work provided a comprehensive examination of inter-individual variation and intra-individual temporal variation for commonly used measures, including fractional amplitude of low frequency fluctuations, regional homogeneity, voxel-mirrored homotopic connectivity, network centrality and global signal correlation. Regardless of whether examining intra-individual or inter-individual variation, we found that these definitionally distinct R-fMRI indices tend to exhibit a relatively high degree of covariation. When taken as a measure of intrinsic brain function, inter-individual differences in concordance for R-fMRI indices appeared to be stable, and negatively related to age (i.e., functional concordance among indices decreases with age). To understand the functional significance of concordance, we noted that higher concordance was generally associated with higher strengths of R-fMRI indices, regardless of whether looking through the lens of inter-individual (i.e., high vs. low concordance participants) or intra-individual (i.e., high vs. low concordance states identified via temporal dynamic analyses) differences. Finally, temporal dynamics analyses also revealed that high concordance states are characterized by increased within- and between-network functional connectivity, suggesting more general variations in network integration and segregation. The current study draws attention to questions regarding how to select an R-fMRI index for usage in a given study, as well as how to compare findings across studies that examine inter-individual or group differences using different indices. Additionally, our work suggests global neural signals exist in the brain, and their spontaneous variations over time result in fluctuations in the connectedness of brain regions.

提交时间: 2017-11-06 点击量2125下载量645 评论 0

5. chinaXiv:201710.00010 [pdf]

Chinese Color Nest Project (CCNP)i: Growing Up in China

Ning Yang; Ye He; Zhe Zhang; Hao-Ming Dong; Lei Zhang; Xing-Ting Zhu; Xiao-Hui Hou; Yin-Shan Wang; Quan Zhou; Zhu-QingGong; Li-Zhi Cao; Ping Wang; Yi-Wen Zhang; Dan-Yang Sui; TingXu1; Gao-Xia Wei; Zhi Yang; Lili Jiang; Hui-Jie Li; Ting-YongFeng
分类: 心理学 >> 实验心理学

Abstract: To face the challenges of keeping healthy in increasing population sizes of both ageing and developing people in China, a fundamental request from the public health is the development of lifespan normative trajectories of brain and behavior. This paper introduces the Chinese Color Nest Project (CCNP 2013–2022), a large-scale tenyear program of modeling brain and behavioral trajectories for human lifespan (6–85 years old). We plan to gradually collect the behavioral and brain imaging data at ages across the lifespan on nationwide and depict the normal trajectory of Chinese brain development across the lifespan, based on the accelerated longitudinal design in the coming next 10 years starting at 2013. Various psychiatric disorders have been demonstrated highly relevant to abnormal events during the neurodevelopment regarding their onset ages of first episodes. Therefore, delineation of normative growth curves of brain and cognition in typically developing children is extremely useful for monitoring, early detecting and intervention of various neurodevelopmental disorders. In this paper, we detailed the developing part of CCNP, devCCNP. It tracked 192 healthy children and adolescents (6–18 years old) in Beibei district of Chongqing for the first 5 years of the full CCNP cohort (2013–2017). To demonstrate the feasibility of implementing the longterm follow-up of CCNP, we here comprehensively document devCCNP in terms of its experimental design, sample strategies, data acquisition and storage as well as some preliminary results and data sharing roadmap for future. Specifically, we first describe the accelerated longitudinal sampling design as well as its exact ratio of sample dropping off during the data collection. Second, we present several initial findings such as canonical growth curves of cortical surface areas of a set of well-established large-scale functional networks of the human brain. Finally, together with records generated by many psychological and behavioral tests, we will provide an individual growing-up report for each family participating the program, initiating the potential guidance on the individual academic and social development. The resources introduced in the current work can provide first-hand data for a series of coming Chinese brain development studies, such as Chinese Standard MRI Brain Templates, Normative Growth Curves of Chinese Brain and Cognition as well as Mapping of Language Areas in Chinese Developing Brain. These would not only offer normative references of the atypical brain and cognition development for Chinese population but also serve as a strong force on accelerating the pace of integrating Chinese brain development into the national brain program or Chinese Brain Project.

提交时间: 2017-10-13 点击量2770下载量814 评论 0

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