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SocCogCom at SemEval-2020 Task 11: Characterizing and Detecting Propaganda using Sentence-Level Emotional Salience Features

机译:Soccogcom在Semeval-2020任务11:使用句子级情感显着特征来表征和检测宣传

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This paper describes a system developed for detecting propaganda techniques from news articles. We focus on examining how emotional salience features extracted from a news segment can help to characterize and predict the presence of propaganda techniques. Correlation analyses surfaced interesting patterns that, for instance, the "loaded language" and "slogan" techniques are negatively associated with valence and joy intensity but are positively associated with anger, fear and sadness intensity. In contrast, "flag waving" and "appeal to fear-prejudice" have the exact opposite pattern. Through predictive experiments, results further indicate that whereas BERT-only features obtained F1-score of 0.548, emotion intensity features and BERT hybrid features were able to obtain F1-score of 0.570, when a simple feedforward network was used as the classifier in both settings. On gold test data, our system obtained micro-averaged F1-score of 0.558 on overall detection efficacy over fourteen propaganda techniques. It performed relatively well in detecting "loaded language" (F1 = 0.772), "name calling and labeling" (F1 = 0.673), "doubt" (F1 = 0.604) and "flag waving" (F1 = 0.543).
机译:本文介绍了一种用于检测新闻文章的宣传技术的系统。我们专注于检查从新闻部门提取的情感显着功能如何有助于表征和预测宣传技术的存在。相关性分析表面的有趣模式,例如“加载语言”和“口号”技术与价和喜悦强度产生负面相关,但与愤怒,恐惧和悲伤强度正相关。相比之下,“旗帜挥舞着”和“吸引恐惧 - 偏见”具有完全相反的模式。通过预测的实验,结果进一步表明,只有伯特特征获得0.548的F1分数,情绪强度特征和BERT混合特征能够获得0.570的F1分数,当时使用简单的前馈网络作为两个设置中的分类器时。在黄金试验数据中,我们的系统在整体检测效能上获得了0.558的微平均F1分数,超过十四次宣传技术。它在检测“加载语言”(F1 = 0.772),“名称呼叫和标记”(F1 = 0.673)中进行相对良好地执行,“疑问”(F1 = 0.604)和“标记挥动”(F1 = 0.543)。

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