LLM mental health simulations produce individually plausible patients but systematically misrepresent real population distributions, with reduced variance, unstable diagnoses, and demographic biases.
(2020).National Health and Nutrition Examination Survey 2005–2018 Data Documentation
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PsychBench: Auditing Epidemiological Fidelity in Large Language Model Mental Health Simulations
LLM mental health simulations produce individually plausible patients but systematically misrepresent real population distributions, with reduced variance, unstable diagnoses, and demographic biases.