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In Medical education

BACKGROUND : Observed Structured Clinical Exams (OSCEs) allow assessment of, and provide feedback to, medical students. Clinical examiners and standardized patients (SP) typically complete itemized checklists and global scoring scales, which have known shortcomings. In this study we applied machine learning (ML) to label some communication skills and interview content information in OSCE transcripts and to compare several ML methodologies by performance and transferability. Methods One-hundred and twenty-one transcripts of two OSCE scenarios were manually annotated per utterance across nineteen communication skills and content areas. Utterances were converted to two types of numeric sentence vector representations and were paired with three types of ML algorithms. First, ML models (MLMs) were evaluated using a five K-fold cross-validation technique on all transcripts in one scenario to generate precision and recall, and their harmonic mean, F1 scores. Second, ML models were trained on all 101 transcripts from scenario one and tested for transferability on twenty scenario two transcripts.

RESULTS : Performance testing in the K--fold cross validation demonstrated relatively high mean F1 scores: median 0.87 and range 0.53-0.98 across all nineteen labels. Transferability testing demonstrated success: F1 median 0.76 and range 0.46-0.97. The combination of a bi-directional Long Short- Term memory neural network (biLSTM) algorithm with GenSen numeric sentence vector representations was associated with greater F1 scores across both performance and transferability (p < 0.005).

CONCLUSIONS : We report the first application of MLM in the context of student-SP OSCEs. We demonstrated that several MLMs automatically labelled OSCE transcripts for a range of interview content and some clinical communications skills. Some MLMs achieved greater performance and transferability. Optimized MLMs could provide automated and accurate assessment of OSCEs with potential to track student progress and identify areas for further practice.

Jani Karan H, Jones Kai A, Jones Glenn W, Amiel Jonathan, Barron Beth, Elhadad NoƩmie

2020-Aug-09

Medical education, OSCE, artificial intelligence, communication skills, machine learning