الرقم الموحد920033515

 التقارير الفنية المتخصصة

Investigating the impact of region DIF on the scores of examinees for the GAT ART Quantitative Test

 Khurrem Jehangir

This study investigates the impact of measurement non-invariance of items/questions on examinee scores in the GAT Art Quantitative test across the different regions of Saudi Arabia. The GAT ART ... المزيد  

Investigating the impact of region DIF on the scores of examinees for the GAT ART Verbal Test

 Khurrem Jehangir

The NCA administers standardized tests like the GAT ART test across Saudi Arabia. The entire country is composed of 13 main regions and students from any region in Saudi Arabia are eligible to a ... المزيد  

Latent Profile Analysis of Teachers’ Conceptions of Assessment in Saudi Arabia

 Dimiter M. Dimitrov & Abdullah Alsadaawi

This study investigates teachers’ conceptions of assessment with a sample of 947 teachers at the primary, intermediate, and secondary school levels in Saudi Arabia using a popular tool on this t ... المزيد  

Power Function Model for Item True Scores on the D-scale

 Dimiter Dimitrov

This study presents a power function (PF) model for the estimation of item true scores (item response functions, IRFs) in the framework of the D-scoring method which is under adoption in the tes ... المزيد  

Robustness of D-scoring Method to Violation of IRT Assumptions

 Yong Luo, Dimiter Dimitrov

The National Center for Assessment (NCA) in Saudi Arabia is moving toward using a recently developed method for test scoring, equating, and item analysis, referred to as D-scoring method (DSM). ... المزيد  

Using results from International Large Scale educational surveys to help improve education in KSA

 Khurrem Jehangir

International and National Large scale assessments are an important source of information for steering national educational policy. These assessments not only collect data on cognitive performan ... المزيد  

Differences Between Education Tiers on the SAAT by Use of a FACETS Analysis

 Georgios Sideridis

The present study targeted at providing information in relation to: (a) identifying differences between Tiers item clusters, and, (b) predict potential differences from personal characteristics. ... المزيد  

Estimating the Probability of Relative Errors within a Prespecified Margin of Tolerance

 Dimiter M. Dimitrov

This paper provides analytic formulas for the probability of relative errors within a prespecified interval of tolerance. Considered are relative errors defined with the ratio of absolute error ... المزيد  

Investigating Effects of Testlets on Item and Ability Parameters in General Aptitude Test (GAT) with Bayesian MCMC Methods and Bifactor Model

 Burhanettin Özdemir

This study examines item responses to reading comprehension testlets embedded in the verbal sections of General Aptitude Test (GAT), Art and Science scales, developed and administered by Nationa ... المزيد  

Investigating Item Exposure on the GAT ART Verbal tests

 Khurrem Jehangir

The NCA tests conducts a large number of students on most of their tests and in tests like the GAT, the numbers are huge. This presents a problem that all students cannot be tests on the same da ... المزيد  


​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​

شارك على