ABSTRACT
The quality of the tests and the relationship between clinical achievement and comprehensive exam scores were studied in the sixth year medical students of the Faculty of Medicine Siriraj Hospital during the academic years B.E. 2527-2534. The results were as follows: The content validity of the test used in each academic year was justified, which implied that such test was in accordance with the domain specifications defined in the Medical License Standard set by Thai Medical Council in the year B.E. 2527. However, the representativeness of the test was lacking because only 1-2 test items could not adequately sample such an extensive content area as listed in the table of specification. The tests showed a high degree of concurrent validity, implying that they could be used interchangeably with the 6-years cumulative grade point average to describe the student’s achievement. The reliability coefficients of the tests for eight academic years ranged from .77 to .90. The results of item analysis of the tests revealed the average difficulty with values from .54 to .59 and average index of discrimination with values from .10 to .13. The 4th and 5th year grade point averages were significantly correlated with the exam scores in each year (p < .01) and were able to predict the exam scores ranging from 50 to 66%.