A Comparative Study of Item Analysis by Item Response Theory Based for Initiating CAT(Computer Adaptive Test) System / 한국의학교육

Prior to CAT, the parameter estimation on executed items should be accomplished by IRT.and the item banking must be build up on the basis of the parameter of difficulty. A program developed by Korea ETS Inc, Bilog and Bigsteps were all found to be very powerful to understand the attributes of items. Though multiple true-false type K items have some merits, the items should be examined quantitatively if they are appropriate or not by IRT. Through the study we have finally confirmed that the new program developed by Korea ETS has its ability to check the validities of items from preparing or scoring to item analysis.