Feasibility and Measurement Properties of a Large Language Model-Based Virtual Patient Laboratory for Clinical Reasoning Training in Physical Therapy Students: Single-Arm Pilot Study

Background: Large language models (LLMs) configured as virtual patients may expand structured practice of clinical reasoning in health professions education. Before testing effectiveness, it must be established whether students engage with them and whether the resulting scores are complete, reliable, and related to performance with real patients. Our earlier pilot randomized trial found very low engagement with a less structured LLM-based approach. Objective: This study aimed to assess the feasibility (adherence, acceptability, and data completeness) of a revised, structured LLM-based clinical

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