arXiv cs.AI· Davood Wadi, Yu Ma·· 9 天前AI 评分25
AI 智能体代购时排名还重要吗？研究揭示位置偏差
Does Rank Still Matter? Position Bias When AI Agents Shop on Our Behalf
AI 导读
一项基于 5 个 LLM、7000 次会话的研究对比了 AI 智能体与人类消费者的购物行为，发现 AI 智能体搜索范围更广，低排名商品被查看的概率同样更低，但影响小于人类。与人类不同，AI 智能体呈现"中间迷失"效应，即中间位置商品被查看概率最低。位置效应集中在较低推理投入时，提高推理投入可降低所有表现出该效应的 LLM 的中间位置惩罚。
正文 · 原文
Abstract:When shopping is delegated to AI agents, it is unclear whether the ranking advantage documented for humans persists. Across 7,000 sessions with five large language models (LLMs) and varying reasoning effort, we compare AI agents with human field data. AI agents search more extensively than human consumers. As with humans, lower-ranked listings are less likely to be inspected, although the effect is smaller for AI agents. Unlike humans, AI agents show a pattern consistent with the lost-in-the-middle effect, whereby middle listings have the lowest probability of inspection. At the choice stage, position effects are concentrated at lower reasoning effort, but higher effort reduces the middle penalty for every LLM that exhibits it. These findings suggest that, when search is delegated, displayed attributes may matter more than placement, and that exposure to position bias depends on how the AI agent is configured.
| Subjects: | Artificial Intelligence (cs.AI); General Economics (econ.GN) |
| Cite as: | arXiv:2608.22697 [cs.AI] |
| (or arXiv:2608.22697v4 [cs.AI] for this version) | |
| https://doi.org/10.48550/arXiv.2608.22697 arXiv-issued DOI via DataCite |
Submission history
From: Davood Wadi [view email]
[v1]
Mon, 24 Aug 2026 01:22:28 UTC (885 KB)
[v2]
Fri, 28 Aug 2026 01:48:35 UTC (1,365 KB)
[v3]
Tue, 8 Sep 2026 02:01:15 UTC (1,365 KB)
[v4]
Thu, 8 Oct 2026 17:01:02 UTC (598 KB)
来源：arXiv cs.AI · arxiv.org