When station number varies widely, duration time per station is not a major factor affecting OSCE internal consistency¶

Claim · All claims
Evidence · 1 study · quant-synthesis r2 · q3
Currency · newest study 2025 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? Across the full range of station numbers, pooled alpha did not reach good internal consistency for either duration group (<10 min: 0.73; >=10 min: 0.77), and the authors conclude duration was not a major factor when station number varied greatly. → Peng Qiyun 2025

Evidence¶

Peng Qiyun 2025¶

Peng Qiyun, Luo Jiani, Wang Chunyan, Chen Lei, Tan Shenglan. (2025). Impact of station number and duration time per station on the reliability of Objective Structured Clinical Examination (OSCE) scores: a systematic review and meta-analysis. BMC Medical Education. https://doi.org/10.1186/s12909-025-06691-0

q3 · i? · quant-synthesis · r2

Meta-analysis of studies grouped by duration (<10 min vs >=10 min) across all station numbers. Neither group reached the alpha >= 0.8 threshold, and the authors state this may be because time was already considered in assessment design or mitigated by optimized station content.

"the cumulative Cronbach's alpha for both groups indicated not reaching good internal consistency (0.73 and 0.77, respectively)."

Discussion¶

Related Claims¶

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• Cronbach's alpha values for OSCE scores vary widely across studies, ranging from 0.43 to 0.93, with most studies not reaching good internal consistency — related
• When OSCEs have 5-10 stations, duration per station under 10 minutes yields significantly better internal consistency (alpha = 0.88) than 10 or more minutes (alpha = 0.64) — related
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