This videos demonstrates how to fit 4 item response theory models using jMetrik. I will show how to fit a 1-parameter logistic model (1PL), 2PL, 3PL, and 4PL. In addition, the correlations between ability measures estimated by the models as well as some useful graphs will be presented.

Useful links:
Download jMetrik: https://itemanalysis.com/jmetrik-down...
What can gaze behaviors, neuroimaging data, and test scores tell us about test method effects and cognitive load in listening assessments?: https://journals.sagepub.com/doi/10.1...

Book: https://www.routledge.com/Applied-Mea...

Paper: https://www.tandfonline.com/doi/abs/1...

A comprehensive review of Rasch measurement in language assessment: Recommendations and guidelines for research: https://journals.sagepub.com/doi/full...