[en] Computerized adaptive testing (CAT) has become an important field of research for educational and psychological measurement. It provides tailored testing at the test taker level, focusing on the optimal administration of the items to improve accuracy and precision in individual ability estimation. Yet, practical implementation of CAT programs are still demanding both in terms of item bank creation and calibration, and require appropriate online platforms and suitable algorithms for underlying psychometric computations.
The purpose of this workshop is twofold: (a) to briefly introduce the concepts of item response theory (IRT) and CAT in a practical, end-user approach; (b) to present a package of the R software, called catR, that performs all underlying IRT- and CAT-related calculations. This package is also adequate to perform simulation studies, which are most useful to assess the quality of an item and help in designing efficient CATs. Some live demonstrations of catR will be proposed to conclude the workshop.
participants are invited to bring their laptops with R and RStudio software pre-installed. Electronic copies of the presentation and an R script with the code for illustrative examples will be provided.
Disciplines :
Education & instruction
Author, co-author :
Magis, David ; Université de Liège > Département des Sciences de l'éducation > Psychométrie et édumétrie
Language :
English
Title :
Computerized adaptive testing: Principles, issues and implementation
Publication date :
07 April 2017
Event name :
Workshop at Department of Applied Linguistics and Technology