论文标题
SocCogcom在Semeval-2020任务11:使用句子级情感显着性特征来表征和检测宣传
SocCogCom at SemEval-2020 Task 11: Characterizing and Detecting Propaganda using Sentence-Level Emotional Salience Features
论文作者
论文摘要
本文介绍了一种用于检测新闻文章中宣传技术的系统。我们专注于研究新闻片段中提取的情感显着性特征如何有助于表征和预测宣传技术的存在。相关性分析表现出有趣的模式,例如,“加载的语言”和“口号”技术与价和欢乐强度负相关,但与愤怒,恐惧和悲伤强度呈正相关。相比之下,“挥舞着旗帜”和“吸引恐惧判决”的模式完全相反。通过预测实验,结果进一步表明,尽管仅获得0.548的F1得分的仅BERT特征,但情感强度特征和BERT混合功能能够获得0.570的F1得分,而在这两种设置中都将简单的Feelforward网络用作分类器。在黄金测试数据上,我们的系统在14种宣传技术的总体检测功能上获得了0.558的微平均F1得分。它在检测“加载语言”(F1 = 0.772),“名称和标记”(F1 = 0.673),“疑虑”(F1 = 0.604)和“ Flag Waving”(F1 = 0.543)方面表现相对较好。
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).