The use of global rating scales for OSCEs in veterinary medicine

OSCEs (Objective Structured Clinical Examinations) are widely used in health professions to assess clinical skills competence. Raters use standardized binary checklists (CL) or multi-dimensional global rating scales (GRS) to score candidates performing specific tasks. This study assessed the reliabi...

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Bibliographic Details
Published in:PloS one 2015-03, Vol.10 (3), p.e0121000-e0121000
Main Authors: Read, Emma K, Bell, Catriona, Rhind, Susan, Hecker, Kent G
Format: Article
Language:English
Subjects:
Analysis of Variance
Check lists
Checklist - methods
Clinical competence
Clinical Competence - standards
Colleges & universities
Education, Veterinary - standards
Educational Measurement - methods
Female
Humans
Male
Medicine
Reliability analysis
Schools
Skill development
Skills
Skin
Students
Students, Medical
Studies
Suture Techniques - standards
Suture Techniques - veterinary
Variance analysis
Veterinary medicine
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Summary:OSCEs (Objective Structured Clinical Examinations) are widely used in health professions to assess clinical skills competence. Raters use standardized binary checklists (CL) or multi-dimensional global rating scales (GRS) to score candidates performing specific tasks. This study assessed the reliability of CL and GRS scores in the assessment of veterinary students, and is the first study to demonstrate the reliability of GRS within veterinary medical education. Twelve raters from two different schools (6 from University of Calgary [UCVM] and 6 from Royal (Dick) School of Veterinary Studies [R(D)SVS] were asked to score 12 students (6 from each school). All raters assessed all students (video recordings) during 4 OSCE stations (bovine haltering, gowning and gloving, equine bandaging and skin suturing). Raters scored students using a CL, followed by the GRS. Novice raters (6 R(D)SVS) were assessed independently of expert raters (6 UCVM). Generalizability theory (G theory), analysis of variance (ANOVA) and t-tests were used to determine the reliability of rater scores, assess any between school differences (by student, by rater), and determine if there were differences between CL and GRS scores. There was no significant difference in rater performance with use of the CL or the GRS. Scores from the CL were significantly higher than scores from the GRS. The reliability of checklist scores were .42 and .76 for novice and expert raters respectively. The reliability of the global rating scale scores were .7 and .86 for novice and expert raters respectively. A decision study (D-study) showed that once trained using CL, GRS could be utilized to reliably score clinical skills in veterinary medicine with both novice and experienced raters.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0121000