AI搜索摘要会影响用户对议题的态度，尤其顶部位置效果更强。
AI summaries in online search influence users' attitudes
- 通过控制实验测试了摘要位置和立场对用户态度的影响。
- 顶部摘要使用户态度更倾向摘要立场，但不影响行为意图。
- 用户更觉得强调健康危害的摘要更有用，熟悉度和信任度有调节作用。
本研究考察了日益突出的AI生成摘要如何影响用户对不同议题的看法。在一项预注册的随机对照实验中，2,004名参与者浏览了包含或不包含AI摘要、摘要位于页面顶部或中部、以及采用利益导向或损害导向表述的模拟搜索结果页面，覆盖四个公众争议性话题。相比无摘要对照组，接触AI摘要的用户其议题态度、行为意向和政策支持更倾向于摘要所持立场。位于页面顶部的摘要比中部摘要对用户态度的影响更强（但对行为意向和政策支持无显著差异）。此外，议题熟悉度和对AI的一般信任度存在调节效应。用户认为强调健康危害的摘要更具实用性。研究结果表明，AI生成的搜索摘要能显著塑造公众认知，对整合AI的信息生态设计与监管具有重要启示。
原文摘要 · Abstract (English)
This study examined how AI-generated summaries, which have become visually prominent in online search results, affect how users think about different issues. In a preregistered randomized controlled experiment, participants (N = 2,004) viewed mock search result pages varying in the presence (vs. absence), placement (top vs. middle), and stance (benefit-framed vs. harm-framed) of AI-generated summaries across four publicly debated topics. Compared to a no-summary control group, participants exposed to AI-generated summaries reported issue attitudes, behavioral intentions, and policy support that aligned more closely with the AI summary stance. The summaries placed at the top of the page produced stronger shifts in users' issue attitudes (but not behavioral intentions or policy support) than those placed at the middle of the page. We also observed moderating effects from issue familiarity and general trust toward AI. In addition, users perceived the AI summaries more useful when it emphasized health harms versus benefits. These findings suggest that AI-generated search summaries can significantly shape public perceptions, raising important implications for the design and regulation of AI-integrated information ecosystems.
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