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Trait Conscientiousness and the Personality Meta-Trait Stability are Associated with Regional White Matter Microstructure

机译:人格特质和人格特质的稳定与区域性物质的微观结构有关

摘要

Establishing the neural bases of individual differences in personality has been an enduring topic of interest. However, while a growing literature has sought to characterise grey matter correlates of personality traits, little attention to date has been focused on regional white matter correlates of personality, especially for the personality traits agreeableness, conscientiousness, and openness. To rectify this gap in knowledge we used a large sample (n550) of older adults who provided data on both personality (International Personality Item Pool: IPIP) and white matter tract-specific fractional anisotropy (FA) from diffusion tensor MRI. Results indicated that conscientiousness was associated with greater FA in the left uncinate fasciculus (β = .17, p .001). We also examined links between FA and the personality meta-trait 'stability', which is defined as the common variance underlying agreeableness, conscientiousness, and neuroticism/emotional stability. We observed an association between left uncinate fasciculus FA and stability (β = .27, p .001), which fully accounted for the link between left uncinate fasciculus FA and conscientiousness. In sum, these results provide novel evidence for links between regional white matter microstructure and key traits of human personality, specifically conscientiousness and the meta-trait, stability. Future research is recommended to replicate and address the causal directions of these associations.
机译:建立人格差异的神经基础一直是人们关注的永恒话题。然而,尽管越来越多的文献试图刻画人格特质的灰质相关性,但迄今为止很少有人关注人格的区域性白质相关性,特别是在人格特质的可喜性,尽责性和开放性方面。为了纠正这一知识鸿沟,我们使用了一个较大的老年人样本(n> 550),他们从扩散张量MRI提供了有关人格(国际人格项目库:IPIP)和白质道特异性分数各向异性(FA)的数据。结果表明,尽职尽责与左束状筋膜中FA升高有关(β= .17,p <.001)。我们还检查了FA与人格特质“稳定”之间的联系,后者被定义为在认同感,责任感和神经质/情绪稳定性基础上的共同差异。我们观察到左扁平筋膜FA与稳定性之间的关联(β= .27,p <.001),这充分说明了左扁平筋膜FA与尽责性之间的联系。总之,这些结果为区域白质微观结构与人格关键特征之间的联系提供了新的证据,尤其是尽责性和元性,稳定性。建议未来的研究来复制和解决这些关联的因果关系。

著录项

  • 作者

    Lewis Gary;

  • 作者单位
  • 年度 2016
  • 总页数
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 入库时间 2022-08-20 20:19:32

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