Extraverts and introverts show different preferences for humor regarding different humor types. However, few studies focused on the neurological underpinnings of the connection between extraversion and the stage-wise cognitive model of humor processing. To investigate the influence of extraversion on different sub-stages of humor processing, electroencephalography (EEG) data was collected when participants read and rated jokes and non-jokes. The event-related potential (ERP) data showed a smaller N400 (300-500 ms) but a larger late positive potential (500-900 ms) for jokes than non-jokes, which may reflect lexical association and integrative interpretation in joke processing. The more extraverted group had a larger P2 (200-300 ms) and a smaller N400 than the less extraverted group in response to all the stimuli, which may indicate their different allocation of attentional and cognitive resources to external stimulation. Additionally, the regression analyses showed that the late positivity effects of jokes were positively correlated with the extraversion level. The results could imply extraverts' controlled processes of cognitive resource allocation for jokes, and suggest the same groups' attentiveness and motivation for reward stimuli (i.e., jokes). Importantly, our ERP data could support extraverts' increased exploration for verbal humor from a better temporal aspect for the first time.

中文翻译：

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外向者如何处理笑话？与事件相关的幽默处理潜能研究。

性格外向和性格内向的人对于不同的幽默类型表现出不同的喜好。但是，很少有研究关注外向性与幽默加工的阶段性认知模型之间联系的神经学基础。为了研究外向性对幽默处理的不同子阶段的影响，参与者在阅读和评价笑话和非笑话时收集了脑电图（EEG）数据。事件相关电位（ERP）数据显示，与非笑话相比，笑话的N400较小（300-500毫秒），但后期笑话的正电位（500-900毫秒）较大，这可能反映了笑话处理中的词汇联想和综合解释。对于所有刺激，外向度较高的组比外向度较低的组具有更大的P2（200-300 ms）和较小的N400，这可能表明他们将注意力和认知资源分配给外部刺激的方式不同。此外，回归分析表明，笑话的后期积极作用与外向性水平呈正相关。结果可能暗示着外向性地控制了笑话的认知资源分配过程，并暗示了同一群体对奖励刺激（如笑话）的关注和动机。重要的是，我们的ERP数据首次可以从更好的时空方面支持外向者对言语幽默的更多探索。控制笑话的认知资源分配过程，并建议同一群体的注意力和动机来奖励奖励（即笑话）。重要的是，我们的ERP数据首次可以从更好的时空方面支持外向者对言语幽默的更多探索。控制笑话的认知资源分配过程，并建议同一群体的注意力和动机来奖励奖励（即笑话）。重要的是，我们的ERP数据首次可以从更好的时空方面支持外向者对言语幽默的更多探索。