Recent events, such as the 2016 US Presidential Campaign, Brexit and the COVID-19 "infodemic", have brought into the spotlight the dangers of online disinformation. There has been a lot of research focusing on fact-checking and disinformation detection. However, little attention has been paid to the specific rhetorical and psychological techniques used to convey propaganda messages. Revealing the use of such techniques can help promote media literacy and critical thinking, and eventually contribute to limiting the impact of "fake news" and disinformation campaigns. Prta (Propaganda Persuasion Techniques Analyzer) allows users to explore the articles crawled on a regular basis by highlighting the spans in which propaganda techniques occur and to compare them on the basis of their use of propaganda techniques. The system further reports statistics about the use of such techniques, overall and over time, or according to filtering criteria specified by the user based on time interval, keywords, and/or political orientation of the media. Moreover, it allows users to analyze any text or URL through a dedicated interface or via an API. The system is available online: https://www.tanbih.org/prta

本研究关注于揭示传播宣传信息所使用的特殊修辞和心理技巧，以促进媒体素养和批判性思维，并最终有助于限制“假新闻”和虚假宣传活动的影响。Pra (Propaganda Persuasion Techniques Analyzer)可探索定期抓取的文章，通过突出显示宣传技术出现的跨度进行比较，并报告相关统计数据。

Prta: 一种用于支持新闻宣传技术分析的系统