From neuronal to psychological noise - Long-range temporal correlations in EEG intrinsic activity reduce noise in internally-guided decision making
From neuronal to psychological noise - Long-range temporal correlations in EEG intrinsic activity reduce noise in internally-guided decision making
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DOI：
10.1016/j.neuroimage.2019.116015
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发表时间：
2019-11-01
期刊：
影响因子：
5.7
通讯作者：
Northoff, Georg
中科院分区：
文献类型：
--
作者：
Nakao, Takashi;Miyagi, Madoka;Northoff, Georg
我们做决定时的个人内部偏好通常是一致的。然而，最近的心理学研究表明，可观察到的内部标准的变化是由随机噪声引起的。上述随机噪声的神经相关性--“心理噪声”的一个实例--仍然不清楚。结合模拟，行为和神经的方法，我们的研究调查了心理和神经相关的随机噪音在我们的内部标准在决策过程中。我们应用了成熟的决策任务，依赖于内部标准-职业选择任务作为内部指导决策（IDM）-或外部标准-工资判断任务作为外部指导决策（EDM）。受试者在IDM和EDM期间接受了静息状态和任务诱发活动的EEG。我们测量了静息状态下的长程时间相关（LRTC）的α频率范围内的神经元噪声的指数。基于我们的模拟，我们确定了IDM中的心理噪声（与真正的偏好变化不同）。主要发现表明，心理噪声的指数直接相关的额中LRTC的α范围。较高程度的额中央LRTC，指标较低的神经元噪声，与IDM期间的心理噪声程度较低。在EDM期间未发现此问题。静息状态LRTC也与任务诱发的活动，如冲突相关的消极性，在IDM只。总之，我们的数据首次证明了大脑内在活动中的神经元噪声与我们决策的内部标准中的心理噪声之间的直接关系。
Our personal internal preferences while making decisions are usually consistent. Recent psychological studies, however, show observable variability of internal criteria occurs by random noise. The neural correlates of said random noise - an instance of 'psychological noise' - yet remain unclear. Combining simulation, behavioral, and neural approaches, our study investigated the psychological and neural correlates of such random noise in our internal criteria during decision making. We applied well-established decision-making tasks which relied on either internal criteria - occupation choice task as internally-guided decision making (IDM) - or external criteria - salary judgment task as externally-guided decision making (EDM). Subjects underwent EEG for resting state and task-evoked activity during IDM and EDM. We measured resting state long-range temporal correlation (LRTC) in the alpha frequency range as the index of neuronal noise. Based on our simulation, we identified a measure of psychological noise (as distinguished from true preference change) in IDM. The main finding shows that the indices for psychological noise are directly related to frontocentral LRTC in the alpha range. Higher degrees of frontocentral LRTC, which index lower neuronal noise, were related to lower degrees of psychological noise during IDM. This was not found during EDM. Resting state LRTC was also related to task-evoked activity, such as conflict-related negativity, during IDM only. Taken together, our data demonstrate, for the first time, the direct relationship between neuronal noise in the brain's intrinsic activity and psychological noise in the internal criteria of our decision making.