Parameters and Models of Item Response Theory (IRT): A Review of Literature
Introduction: Item response theory (IRT) has received much attention in validation of assessment instrument because it allows the estimation of students' ability from any set of the items. Item response theory allows the difficulty and discrimination levels of each item on the test to be estima...
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| Format: | Book |
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Sciendo,
2023-11-01T00:00:00Z.
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| Summary: | Introduction: Item response theory (IRT) has received much attention in validation of assessment instrument because it allows the estimation of students' ability from any set of the items. Item response theory allows the difficulty and discrimination levels of each item on the test to be estimated. In the framework of IRT, item characteristics are independent of the sample and latent traits of the person are independent of the test on the account that the selected models perfectly fit the data. Therefore, scores that describe examinee performance are independent on test difficulty. The scores of the examinee may be lower on a difficult test and higher on easier tests, but the ability level of the examinee remains the same over any test at the time of testing. The IRT model allows the estimation of item parameters. The line of difference between the models and parameters of IRT is not clear to many students in assessment. |
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| Item Description: | 2585-7444 10.2478/atd-2023-0022 |