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A human study of five experts rated 1,500 responses (100 personas, three models) and reports Fleiss kappa 0.71 among annotators and average Spearman 75.1% and Kendall 62.73% between PersonaScore and humans. Linguistic Habits was the hardest task. Personas are described people (for example professions), not fictional characters, and the text and the correlation table disagree on one Kendall claim.\n\nCurator qualifications: PersonaGym: five experts, 1,500 ratings, Fleiss kappa 0.71; Spearman 75.1% with PersonaScore; Linguistic Habits hardest.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://arxiv.org/html/2407.18416v5","note":"candidate evidence excerpts"},{"url":"https://raw.githubusercontent.com/vsamuel2003/PersonaGym/536f705e610289c38d84e083fcea6ea5093d3a25/README.md","note":"candidate evidence excerpts"}]},"categories":["T01","T18","T20"],"tags":[],"language":"en","visibility":"public","moderation":{"state":"visible","reason":null},"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null,"claims":[{"url":"https://arxiv.org/html/2407.18416v5","claim":"PersonaGym (arXiv 2407.18416v5, 5 Sep 2025) scores persona agents on five tasks with an ensemble of two LLM judges using 1-5 rubrics. 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