Temporal stability of objective structured clinical exams: a longitudinal study employing item response theory

dc.creator	Baig Lubna A
dc.creator	Violato Claudio
dc.date	2012-12-01T00:00:00Z
dc.date.accessioned	2015-07-20T22:07:48Z
dc.date.available	2015-07-20T22:07:48Z
dc.identifier	10.1186/1472-6920-12-121
dc.identifier	1472-6920
dc.identifier	https://doaj.org/article/f2b666cd014441369cce79e1ff182061
dc.identifier.uri	http://evidence.thinkportal.org/handle/123456789/11504
dc.identifier.uri	https://doaj.org/article/f2b666cd014441369cce79e1ff182061
dc.description	<p>Abstract</p> <p>Background</p> <p>The objective structure clinical examination (OSCE) has been used since the early 1970s for assessing clinical competence. There are very few studies that have examined the psychometric stability of the stations that are used repeatedly with different samples. The purpose of the present study was to assess the stability of objective structured clinical exams (OSCEs) employing the same stations used over time but with a different sample of candidates, SPs, and examiners.</p> <p>Methods</p> <p>At Time 1, 191 candidates and at Time 2 (one year apart), 236 candidates participated in a 10-station OSCE; 6 of the same stations were used in both years. Generalizability analyses (Ep<sup>2</sup>) were conducted. Employing item response analyses, test characteristic curves (TCC) were derived for each of the 6 stations for a 2-parameter model. The TCCs were compared across the two years, Time 1 and 2.</p> <p>Results</p> <p>The Ep<sup>2</sup> of the OSCEs exceeded.70. Standardized thetas (<it>θ</it>) and discriminations were equivalent for the same station across the two year period indicating equivalent TCCs for a 2-parameter model.</p> <p>Conclusion</p> <p>The 6 OSCE stations used by the AIMG program over two years have adequate internal consistency reliability, stable generalizability (Ep<sup>2</sup>) and equivalent test characteristics. The process of assessment employed for IMG’s are stable OSCE stations that may be used several times over without compromising psychometric properties.</p> <p>With careful security, high-stakes OSCEs may use the same stations that have high internal consistency and generalizability repeatedly as the psychometric properties are stable over several years with different samples of candidates.</p>
dc.language	English
dc.publisher	BioMed Central
dc.relation	http://www.biomedcentral.com/1472-6920/12/121
dc.relation	https://doaj.org/toc/1472-6920
dc.rights	CC BY
dc.source	BMC Medical Education, Vol 12, Iss 1, p 121 (2012)
dc.subject	Stability of OSCEs
dc.subject	Latent trait analyses
dc.subject	Ep<sup>2</sup>
dc.subject	Internal consistency
dc.subject	Medicine (General)
dc.subject	R5-920
dc.subject	Medicine
dc.subject	R
dc.subject	DOAJ:Medicine (General)
dc.subject	DOAJ:Health Sciences
dc.subject	Special aspects of education
dc.subject	LC8-6691
dc.subject	Education
dc.subject	L
dc.subject	DOAJ:Education
dc.subject	DOAJ:Social Sciences
dc.subject	Medicine (General)
dc.subject	R5-920
dc.subject	Medicine
dc.subject	R
dc.subject	DOAJ:Medicine (General)
dc.subject	DOAJ:Health Sciences
dc.subject	Special aspects of education
dc.subject	LC8-6691
dc.subject	Education
dc.subject	L
dc.subject	DOAJ:Education
dc.subject	DOAJ:Social Sciences
dc.subject	Medicine (General)
dc.subject	R5-920
dc.subject	Medicine
dc.subject	R
dc.subject	Special aspects of education
dc.subject	LC8-6691
dc.subject	Education
dc.subject	L
dc.subject	Medicine (General)
dc.subject	R5-920
dc.subject	Medicine
dc.subject	R
dc.subject	Special aspects of education
dc.subject	LC8-6691
dc.subject	Education
dc.subject	L
dc.subject	Medicine (General)
dc.subject	R5-920
dc.subject	Medicine
dc.subject	R
dc.subject	Special aspects of education
dc.subject	LC8-6691
dc.subject	Education
dc.subject	L
dc.title	Temporal stability of objective structured clinical exams: a longitudinal study employing item response theory
dc.type	Article