[Home ] [Archive]   [ فارسی ]  
:: Main :: About :: Current Issue :: Archive :: Search :: Submit :: Contact ::
:: Volume 12, Number 1 (3-2009) ::
IJAL 2009, 12(1): 167-197 Back to browse issues page
Theoretical and Practical Comparison of Classical Test Theory and Item-Response Theory
Sara Jalali, Gholam Reza Kiany
Tarbiat Modarress University, Tehran
Abstract:   (3663 Views)
Classical test theory and item response theory are widely perceived as representing two very different measurement frameworks. Few studies have empirically examined the similarities and differences in the parameters estimated using the two frameworks. The purpose of this study was to examine how item statistics (i.e. item difficulty and item discrimination) and person statistics (i.e. ability estimates) behave under the two measurement frameworks i.e.CTTandIRT. The researchers tried to compare the two models from both theoretical and practical perspectives. For this purpose, first, a theoretical comparison of the two models was carried out then, a sample of 3000 testees taking part in the English language university entrance exam was used in order to compare the two models practically. The findings showed that person statistics from CTT were comparable with those from IRT for all three IRT models. Item difficulty indexes from CTT were comparable with those from all IRT models and especially from the one-parameter logistic (1PL) model. Item discrimination indexes from CTT were somewhat less comparable with those from IRT.
Keywords: Item Response Theory (IRT), Classical Test Theory (CTT), Person statistics, Item statistics
Full-Text [PDF 318 kb]   (1982 Downloads)    
Type of Study: Research |
Add your comments about this article
Your username or email:

Write the security code in the box >



XML   Persian Abstract   Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Jalali S, Kiany G R. Theoretical and Practical Comparison of Classical Test Theory and Item-Response Theory. IJAL. 2009; 12 (1) :167-197
URL: http://ijal.khu.ac.ir/article-1-62-en.html
Volume 12, Number 1 (3-2009) Back to browse issues page
Iranian Journal of Applied Linguistics
Persian site map - English site map - Created in 0.142 seconds with 807 queries by yektaweb 3501