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Med Educ. 2008 Oct;42(10):999-1006. doi: 10.1111/j.1365-2923.2008.03154.x.

Establishing the criterion validity of the Graduate Medical School Admissions Test (GAMSAT).

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  • 1Australian Council for Educational Research, University of Melbourne, Melbourne, Victoria, Australia.



This paper examines the criterion validity of the Graduate Medical School Admissions Test (GAMSAT), which has been used since 1996 in Australia and more recently in the UK and Ireland. The study provides evidence on the extent to which GAMSAT, in combination with grade point average (GPA) and interview scores, adds value to determining an individual's capability for medical study. The study responds to increasing demand for information on the validity of selection processes. Criterion validity is important because it helps to empirically situate selection tests within their broader contexts by, for instance, providing an assurance to educators and the public that test results are valid and add value to selection decisions.


After introducing the rationale and focus of the study, the paper summarises the data and research methods, presents statistical results and draws conclusions that advance current insight into medical school admissions processes. The results are based on data from six institutions and 351 students.


Analyses of GAMSAT, interview and GPA scores show, in summary, that: there are fairly high levels of divergence between these three measures; that relationships between the measures and Year 1 marks vary across institutions, and that a combination of GAMSAT and GPA scores provides the best means of predicting Year 1 performance.

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