用户可修改AI写作以贴近个人风格,但难完全摆脱AI痕迹。
Can You Make It Sound Like You? Post-Editing LLM-Generated Text for Personal Style

- 让用户编辑AI生成文本,提升其与个人写作风格的相似度。
- 编辑后文本仍比真人写作更像AI,且风格多样性下降。
- 人们误以为修改稿已体现个性,实则仍有明显AI特征。
尽管大型语言模型(LLMs)广泛用于写作任务,但当个人风格重要时,用户仍可能不愿依赖它们。后编辑(post-editing)是常见协作策略,但其能否有效重塑个人风格尚不明确。我们开展了一项预注册在线研究(n=81),让参与者对关乎个人风格的写作任务中由LLM生成的草稿进行后编辑。通过基于嵌入的风格相似性度量发现,后编辑显著提升了文本与用户无辅助写作的风格相似度,降低了与纯LLM输出的相似度。然而,后编辑文本仍比用户无辅助文本更接近于LLM风格,且风格多样性低于真人写作。我们观察到感知的真实性与模型测量的风格相似性之间存在差距:尽管后编辑文本常被用户认为反映个人风格,但仍可检测到明显的LLM风格痕迹。
原文摘要 · Abstract (English)
Despite the growing use of large language models (LLMs) for writing tasks, users may hesitate to rely on LLMs when personal style is important. Post-editing LLM-generated drafts or translations is a common collaborative writing strategy, but it remains unclear whether users can effectively reshape LLM-generated text to reflect their personal style. We conduct a pre-registered online study ($n=81$) in which participants post-edit LLM-generated drafts for writing tasks where personal style matters to them. Using embedding-based style similarity metrics, we find that post-editing increases stylistic similarity to participants' unassisted writing and reduces similarity to fully LLM-generated output. However, post-edited text still remains stylistically closer in style to LLM text than to participants' unassisted control text, and it exhibits reduced stylistic diversity compared to unassisted human text. We find a gap between perceived stylistic authenticity and model-measured stylistic similarity, with post-edited text often perceived as representative of participants' personal style despite remaining detectable LLM stylistic traces.
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