Abstract：
This study examined the effect of context on the prediction of emotional words with varying valences. It investigated the neural mechanisms underlying the processing differences of emotion words with different valences in both predictable and unpredictable contexts. Additionally, it aimed to address the conflicting results regarding the processing time in predictive contexts reported in previous studies.
Participants were instructed to carefully read the text that included the specified emotion words. Event-related potentials elicited by emotional words were measured. To ensure that the participants can read the text carefully, 33% of the texts are followed by comprehension problems. After reading the text, the comprehension questions were answered based on the text content.
The study revealed that the N400 amplitude elicited by an unpredictable context was greater than that elicited by a predictable context. Additionally, the N400 amplitude triggered by positive emotion words was larger than that triggered by negative emotion words. However, there was no significant difference in late positive component amplitude observed between contextual prediction and emotional word valence.
The present study suggests that predictive processing takes place at an intermediate stage of speech processing, approximately 400 ms after stimulus onset. Furthermore, the presence of a predictive context enhances the processing of emotional information. Notably, brain activity is more pronounced during the processing of positive emotional stimuli compared to negative emotional stimuli. Additionally, the facilitative effect of a predictable context diminishes in the advanced phase of Chinese speech comprehension.
Participants were instructed to carefully read the text that included the specified emotion words. Event-related potentials elicited by emotional words were measured. To ensure that the participants can read the text carefully, 33% of the texts are followed by comprehension problems. After reading the text, the comprehension questions were answered based on the text content.
The study revealed that the N400 amplitude elicited by an unpredictable context was greater than that elicited by a predictable context. Additionally, the N400 amplitude triggered by positive emotion words was larger than that triggered by negative emotion words. However, there was no significant difference in late positive component amplitude observed between contextual prediction and emotional word valence.
The present study suggests that predictive processing takes place at an intermediate stage of speech processing, approximately 400 ms after stimulus onset. Furthermore, the presence of a predictive context enhances the processing of emotional information. Notably, brain activity is more pronounced during the processing of positive emotional stimuli compared to negative emotional stimuli. Additionally, the facilitative effect of a predictable context diminishes in the advanced phase of Chinese speech comprehension.
摘要：
目的：本研究考察了语境对不同效价的情绪词预测的影响。它研究了在可预测和不可预测的情况下处理具有不同效价的情感词差异的潜在神经机制。此外,本研究旨在解决先前研究中报告的预测背景下处理时间的矛盾结果.
方法：参与者被指示仔细阅读包含指定情感词的文本。测量了由情感词引起的事件相关电位。为了确保参与者能够仔细阅读文本，33%的课文后面是理解问题。读完课文后，理解问题是根据文本内容回答的。
结果：研究表明，由不可预测的上下文引起的N400振幅大于由可预测的上下文引起的振幅。此外,积极情绪词触发的N400振幅大于消极情绪词触发的N400振幅。然而,在语境预测和情绪词价之间观察到的晚期正成分幅度没有显着差异。
结论：本研究表明，预测性处理发生在语音处理的中间阶段，刺激开始后约400ms。此外，预测性上下文的存在增强了情绪信息的处理。值得注意的是,与消极情绪刺激相比，大脑活动在积极情绪刺激的处理过程中更为明显。此外,在汉语言语理解的高级阶段，可预测语境的促进作用减弱。
方法：参与者被指示仔细阅读包含指定情感词的文本。测量了由情感词引起的事件相关电位。为了确保参与者能够仔细阅读文本，33%的课文后面是理解问题。读完课文后，理解问题是根据文本内容回答的。
结果：研究表明，由不可预测的上下文引起的N400振幅大于由可预测的上下文引起的振幅。此外,积极情绪词触发的N400振幅大于消极情绪词触发的N400振幅。然而,在语境预测和情绪词价之间观察到的晚期正成分幅度没有显着差异。
结论：本研究表明，预测性处理发生在语音处理的中间阶段，刺激开始后约400ms。此外，预测性上下文的存在增强了情绪信息的处理。值得注意的是,与消极情绪刺激相比，大脑活动在积极情绪刺激的处理过程中更为明显。此外,在汉语言语理解的高级阶段，可预测语境的促进作用减弱。
