Abstract
Introduction: An extended clinical examination (ECE) was administered to 85 final year medical students at the Radboud University Medical Centre in the Netherlands. The aim of the study was to determine the psychometric quality and the suitability of the ECE as a measurement tool to assess the clinical proficiency of eight separate clinical skills.Methods: Generalizability studies were conducted to determine the generalizability coefficient and the sources of variance of the ECE. An additional D-study was performed to estimate the generalizability coefficients with altering numbers of stations.Results: The largest sources of variance were found in skill difficulties (36.18%), the general error term (26.76%) and in the rank ordering of skill difficulties across the stations (21.89%). The generalizability coefficient of the entire ECE was above the 0.70 lower bound (G = 0.74). D studies showed that the separate skills could yield sufficient G coefficients in seven out of eight skills, if the ECE was lengthened from 8 to 14 stations.Discussion: The ECE proved to be a reliable clinical assessment that enables examinees to compose a clinical reasoning path through self-obtained data. The ECE can also be used as an assessment tool for separate clinical skills.
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