PURPOSE The reliability of test is determined by each items' characteristics. Item analysis is achieved by classical test theory and item response theory. The purpose of the study was to compare the discrimination indices with item response theory using the Rasch model. METHODS Thirty-one 4th-year medical school students participated in the clinical course written examination, which included ...

Background: According to the industrialization of countries and development of societies, tests and methods are required to employ people in industries and organizations and make the best selection in getting workforce. Interviews, Written tests  , and multiple choice tests are common methods used in employing people. Among these methods  , multiple choice tests is the easiest one because of th...

In multidimensional item response theory (MIRT), it is possible for the estimate of a subject’s ability in some dimension to decrease after they have answered a question correctly. This paper investigates how and when this type of paradoxical result can occur. We demonstrate that many response models and statistical estimates can produce paradoxical results and that in the popular class of line...

We investigate short-term learning from hints and feedback in a Web-based physics tutoring system. Both the skill of students and the difficulty and discrimination of items were determined by applying item response theory IRT to the first answers of students who are working on for-credit homework items in an introductory Newtonian physics course. We show that after tutoring a shifted logistic i...

Using item response theory (IRT) in computer adaptive test (CAT) is critical to assess learners’ readiness for further learning. This theory has assumptions concerning the mathematical relationship between learner’s abilities and item responses. A numerical value from the theory has potential to decide who the best learner is. The IRT score only provides the learner’s result and lack of the ass...

Item response theory (IRT) models are a class of statistical models used by researchers to describe the response behaviors of individuals to a set of categorically scored items. The most common IRT models can be classified as generalized linear fixedand/or mixed-effect models. Although IRT models appear most often in the psychological testing literature, researchers in other fields have success...

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