AI改写邮件语气影响收件人情绪，间接提升回复率
Playful AI in Professional Email: A Field Experiment on Tone and Recipient Engagement
- 用GPT-5改写邮件为玩味或正式语气，观察员工行为变化
- 玩味语气提升情感积极度，正式语气降低，但不影响打开/回复率
- 情绪正向性是影响打开和回复的关键中介，适合关注职场沟通的读者
大型语言模型正在快速改变职场沟通方式，但AI辅助写作是否真正影响收件人行为及其作用路径尚不明确。本研究在六家公司开展随机交叉现场实验，121名员工在三周内分别以三种方式发送工作邮件：自主撰写、GPT-5以玩味语气重写、GPT-5以正式语气重写。共分析16,880封邮件发现，玩味改写显著提升情感积极性（B=+0.068，p<0.001），正式改写则降低（B=-0.041，p<0.001），但两种干预均未直接改变邮件打开率、回复率或响应时间。然而，发件人邮件的情感积极度显著预测了打开（OR=2.05）与回复（OR=3.32，p<0.001），构成一条关键间接路径。结果表明，AI辅助沟通通过生成的语言情绪基调间接塑造职场参与，而非其使用本身。
原文摘要 · Abstract (English)
Large language models (LLMs) are rapidly reshaping workplace communication, yet whether AI-assisted writing changes how recipients actually behave, and through what channel, remains unknown. Here, in a randomized crossover field experiment, 121 employees across six companies sent work emails under three conditions over three weeks: unaided writing, GPT-5 rewriting in a playful tone, and GPT-5 rewriting in a professional tone. Across 16,880 emails, playful editing increased emotional positivity (B=+0.068, p<0.001), and professional editing decreased it (B=-0.041, p<0.001), yet neither condition directly altered open rates, reply rates, or response times. Instead, within-sender positivity strongly predicted both opening (OR=2.05) and replying (OR=3.32, p<0.001), a significant indirect pathway through which AI editing shaped behavior, in the absence of any direct effect. These findings suggest that AI-assisted communication shapes workplace engagement not through its use, but through the emotional tone of the language it produces.
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