Computer Based Adaptive Testing

Abstract

Assessment is a fundamental part of the learning system. Now-a-days Computer based test is normal. Adaptive testing is a type of Computer based testing that depends on the student's ability. This adaptive testing is possible with two distinct theories. Those theories are Classical Test Theory (CTT) and Item Response Theory (IRT). CTT is moderately straightforward. This theory has simple theoretical model, which make CTT to apply in numerous testing circumstances. However, IRT has got exponential development in these late decades. IRT essentially concentrates on the item level information rather than the CTT's essential concentrate on test level information. The IRT framework incorporates a gathering of models, and the applicability of every model in a specific circumstance which relies on the test items and the viability of different theoretical assumptions about the test items. For test items that are dichotomously scored, there are three IRT models, known as three-parameter, two-parameter, and one-parameter IRT models. Finally Scoring is done, based on the parameters of the item. Students who react effectively for the most difficult question gets high score when contrasted with students who react accurately for the simplest question.