Evaluation of the effect of items' format and type on psychometric properties of sixth year pharmacy students clinical clerkship assessment items.

Item formats, structure, and number of options in MCQs significantly affected the psychometric properties of the studied items. Noncase based items and open-ended items were easier and more discriminative than case based items and MCQs, respectively. Examination items should be prepared considering the above characteristics to improve their psychometric properties and maximize their usefulness.