Item Response Theory Models and Testing Practices: Current International Status and Future Directions* , **

  title={Item Response Theory Models and Testing Practices: Current International Status and Future Directions* , **},
  author={Ronald K. Hambleton and Sharon Cadman Slater},
  journal={European Journal of Psychological Assessment},
Psychological testing has been undergoing major changes. One of the main changes is the transition from the use of classical to modern test models and methods in test development. The purposes of this paper are to describe the shortcomings of classical test models which are overcome with modern test theory, i.e., item response theory, to introduce the basic concepts of item response theory, to describe several important international applications of item response theory models, and finally, to… 
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