Decomposing fear perception: A combination of psychophysics and neurometric modeling of fear perception.

Decomposing fear perception: A combination of psychophysics and neurometric modeling of fear perception.
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DOI:
10.1016/j.neuropsychologia.2016.08.018
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发表时间:
2016-10
期刊:
影响因子:
2.6
通讯作者:
Li W
Li W
中科院分区:
心理学3区
文献类型:
--
作者:
Forscher EC;Zheng Y;Ke Z;Folstein J;Li W

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众所周知,情绪感知涉及多种操作和分析波,但这些过程的具体性质仍然知之甚少。在恐惧检测任务中,将心理物理学测试和事件相关电位 (ERP) 的神经测量分析与参数变化的恐惧强度 (N=45) 结合起来,我们试图阐明恐惧感知的关键过程。基于标记恐惧感知阈值的心理物理学,我们的神经测量模型拟合确定了几个假定的操作和阶段:面部呈现后依次出现的四个关键过程 - 恐惧中性分类(100 毫秒时的 P1)、恐惧检测(320 毫秒时的 P300)、评估(400-500 毫秒时的晚期正电位/LPP 的早期子组件)和意识意识(500-600 毫秒时的晚期子组件 LPP)女士)。此外,受试者内部大脑行为关联表明,最初的情绪分类是强制性的,与行为无关,而评价和意识直接影响行为结果(分别解释了总方差的 17% 和 31%)。因此,当前的研究揭示了恐惧感知的计时原理,将心理意义赋予了不同的潜在过程。恐惧的早期分类和后期评估相结合,调和了相互冲突的(分类与维度)情绪账户,为混合模型提供了支持。重要的是,未来的研究可以专门询问各种行为和精神病理学(例如焦虑和抑郁)中的这些心理过程。
Emotion perception is known to involve multiple operations and waves of analysis, but specific nature of these processes remains poorly understood. Combining psychophysical testing and neurometric analysis of event-related potentials (ERPs) in a fear detection task with parametrically-varied fear intensities (N=45), we sought to elucidate key processes in fear perception. Building on psychophysics marking fear perception thresholds, our neurometric model fitting identified several putative operations and stages: four key processes arose in sequence following face presentation—fear-neutral categorization (P1 at 100 ms), fear detection (P300 at 320 ms), valuation (early subcomponent of the late positive potential/LPP at 400–500 ms) and conscious awareness (late subcomponent LPP at 500–600 ms). Furthermore, within-subject brain-behavior association suggests that initial emotion categorization was mandatory and detached from behavior whereas valuation and conscious awareness directly impacted behavioral outcome (explaining 17% and 31% of the total variance, respectively). The current study thus reveals the chronometry of fear perception, ascribing psychological meaning to distinct underlying processes. The combination of early categorization and late valuation of fear reconciles conflicting (categorical versus dimensional) emotion accounts, lending support to a hybrid model. Importantly, future research could specifically interrogate these psychological processes in various behaviors and psychopathologies (e.g., anxiety and depression).
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