人工智能驱动的浏览器是广泛准确的新闻摘要器，可减少政治偏见和负面影响
AI-Powered Browsers Are Broadly Accurate News Summarizers That Reduce Political Bias and Negative Affect
中文总结 AI 辅助
研究通过审核三款人工智能驱动浏览器生成的新闻摘要，发现其总体准确，能减弱新闻的意识形态偏见等负面因素，提高清晰度，是重塑新闻的新编辑中介，对民主话语和人工智能治理有启示。
中文摘要 AI 辅助
网络浏览器现在为数百万用户提供人工智能生成的新闻摘要。尽管它们很受欢迎且有影响力，但我们缺乏对这些系统在人们阅读新闻之前如何转换新闻的系统理解。通过大规模审核，我们调查了基于浏览器的人工智能摘要器的事实准确性，以及它们如何改变新闻的政治偏见、负面影响和新闻写作质量。利用来自15家美国新闻媒体的13777篇文章，我们评估了由三款领先的人工智能驱动的浏览器（谷歌浏览器（Gemini）、微软Edge（Copilot）和Perplexity Comet）生成的41331篇摘要。我们发现基于浏览器的人工智能摘要器总体上是准确的。此外，它们通过减弱意识形态偏见、党派立场、负面性、愤怒和恐惧，同时提高清晰度和降低个人语气，持续地转换新闻。这些模式在不同浏览器、媒体意识形态和主题中都有一些差异。我们的研究结果将人工智能驱动的浏览器确定为一类新的编辑中介，它们系统地重塑新闻，对民主话语和人工智能治理具有启示意义。
英文摘要
Web browsers now provide AI-generated news summaries for millions of users. Despite their popularity and influence, we lack a systematic understanding of how these systems transform news before people read it. Through a large-scale audit, we investigate the factual accuracy of browser-based AI summarizers and how they alter the political bias, negative affect, and journalistic writing quality of news. Drawing on 13,777 articles from 15 U.S. news outlets, we evaluate their 41,331 summaries generated by three leading AI-powered browsers: Google Chrome (Gemini), Microsoft Edge (Copilot), and Perplexity Comet. We find that browser-based AI summarizers are broadly accurate. Furthermore, they consistently transform news by attenuating ideological bias, partisan stances, negativity, anger, and fear, while increasing clarity and reducing personal tone. With some variations, these patterns hold across browsers, outlet ideologies, and topics. Our findings identify AI-powered browsers as a new class of editorial intermediaries that systematically reshape news, with implications for democratic discourse and AI governance.
