AINeutralarXiv – CS AI · 14h ago6/10
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When Does Persona Prompting Actually Help? A Retrieval and Metric Analysis of Expert Role Injection in LLMs
Researchers conducted a controlled study of persona prompting in large language models across 1,140 questions and 38 expert roles, finding that while aggregate metrics show minimal improvement, persona prompting consistently trades clarity for expertise depth. The technique's effectiveness varies significantly by domain and question type, with benefits appearing mainly in advisory contexts like medicine and psychology, while baseline prompting outperforms in domains requiring concise explanations.