{"product_id":"item-response-theory-von-sara-jalali","title":"Item Response Theory","description":"\u003cp\u003eThere are two major theories of measurement in psychometrics: Classical  Test Theory (CTT) and Item-Response Theory (IRT). Despite its widespread  and long use, CTT has a number of shortcomings, which make it problematic  to be used for practical and theoretical purposes. IRT tries to solve these  shortcomings, and provide better and more dependable answers. One of the  applications of IRT is the assessment of Differential Item Functioning (DIF).  DIF tells the test developer whether the test item functions differently for  different groups. Another important use of IRT is in the area of Computer  Adaptive Tests (CAT). CAT is based on IRT, and the stepping-stone in  preparing a CAT is the preparation of an item bank. Item banking is based on  IRT. When IRT is ignored, item banking will not be applicable and  consequently there will be no CAT.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783845476933\"\u003e\u003ch3\u003eand its Applications to Differential Item Functioning, Item Banking, and Computer Adaptive Testing in TEFL\u003c\/h3\u003e\u003c\/div\u003e","brand":"Autorenwelt Shop","offers":[{"title":"Softcover - 9783845476933","offer_id":39471318990941,"sku":"9783845476933","price":68.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/c9062e74-d426-4061-8d83-e76f15cb0ca9.jpg?v=1776057315","url":"https:\/\/shop.autorenwelt.de\/products\/item-response-theory-von-sara-jalali","provider":"Autorenwelt Shop","version":"1.0","type":"link"}