Previous research has linked neural correlates with motivational traits and measures of impulsivity. However, few previous studies have investigated whether individual differences in motivation and impulsivity moderate the relationship between these disparate neural activity patterns. In a sample of 118 young adults, we used Electroencephalography (EEG) to examine whether behavioral activation and inhibition systems (BIS/BAS) and impulsivity facets (negative urgency, lack of perseverance), moderate the relationship between beta power and resting frontal alpha asymmetry. Regression analyses revealed a novel relationship between lesser beta power and greater left frontal alpha asymmetry (LFA). Moderation analyses suggest this relationship may strengthen as BIS/BAS levels increase, and trait impulsivity levels decrease from the mean. These results are among the first revealing a relationship between two widely investigated neural activity patterns of motivation and provide some indication individual differences moderate this relationship. The limitations of these findings and need for future research are discussed.

先前的研究已将神经相关性与动机特征和冲动性测量联系起来。但是，很少有先前的研究调查过动机和冲动的个体差异是否能缓和这些不同的神经活动模式之间的关系。在118名年轻成年人的样本中，我们使用脑电图（EEG）来检查行为激活和抑制系统（BIS / BAS）和冲动性方面（负的紧迫性，缺乏毅力），调节β功率与静息额叶不对称之间的关系。回归分析显示，较小的β功效与较大的左额叶α不对称性（LFA）之间存在新颖的关系。适度分析表明，这种关系可能会随着BIS / BAS水平的提高而增强，而特征冲动水平则从均值降低。这些结果是首次揭示两种广泛研究的神经活动动机模式之间的关系，并提供了一些个体差异缓和这种关系的指示。讨论了这些发现的局限性以及对未来研究的需求。