الرقم الموحد920033515

 التقارير الفنية المتخصصة

Investigating the Violation of Local Independence in the GAT Verbal test

 Khurrem Jehangir

Local independence (LID) of items is a basic assumption of IRT models. In other words the responses to items in a test should not be independent to each other, conditional on a latent trait that ... المزيد  

Investigating the Violation of Local Independence in the GAT Quantitative test

 Khurrem Jehangir

It is well known that violation of the model assumptions for scaling tests can lead to biased results. One is of local independence (LID), which means that the response probability for answering ... المزيد  

Examining Differential Distractor Functioning of GAT-ART items with Non-linear Logistic Regression Models

 Burhanettin Özdemir

This study aims at examining the distractors` behavior of items that exhibited DIF across gender in GAT-ART administered by National Center for Assessment (NCA) in Saudi Arabia. For this purpose, ... المزيد  

Testing for Item Fit Under the D-scoring Model

 Dimiter Dimitrov, Yong Luo

In the framework of D-scoring (Dimitrov, 2016, 2017), this study examined two statistics for the purpose of detecting item misfit, mean absolute error (MAE) and root-mean-square error (RSME). Bo ... المزيد  

Examining Students’ Performance on Pre-College Tests (GAT and SAAT), College GPA, and Post-College Tests (PGAT and Teacher Test): The Case of Science Colleges at Saudi Universities

 Dimiter Dimitrov Khaleel Al-Harbi,

The purpose of this study was twofold. First, to examine the students’ performance within a targeted College of Science on pre-college admission tests (GAT and SAAT) and their GPA profiles across ... المزيد  

Comparisons between the 5 Common Test Forms of the Computer based GAT Quantitative test and the Paper& Pencil GAT Quantitative test: Factor Structure & Reliability

 Khurrem Jehangir

TR142-2016 Abstract This study investigates and compares the dimensionality and factor structure of test data on the two modes of assessment being administered in the NCA for the Quantitative s ... المزيد  

DIF Analysis for ltem and Test on NCA Tests the General Abilit Test (GAT) Art Major

 Georgios Sideridis & Ioannis Tsaousis

The aim of this research project is to investigate the presence of bias in the General Aptitude Test (GAT) subscales. Evidence for bias will be provided by use of the Differential Item Functionin ... المزيد  

Examining the Effect of Time-of-Day and Time-of-Week on PGAT Performance

 Ioannis Tsaousis

TR155-2016 Abstract The aim of this study was twofold: first, to examine whether students' performance on the computerized version of PGAT score is related to the time-of-day administration (i.e. ... المزيد  

GAT-Verbal: Testing for Dimensionality and Validation of Factorial structure

 Dimiter M. Dimitrov

This study examines the dimensionality and factorial structure of data on the General Aptitude Test-Verbal Part (GAT-Verbal) administered by the National Center for As­sessment in Higher Educatio ... المزيد  

The Effects of Stem and No-Stem in a Listening Comprehension Task: Evidence from Two Different Databases

 Georgios D. Sideridis

The purpose of the present study was to test the hypothesis that the introduction of a stem condition (presentation of questions in a visual form) in a listening comprehension task would aid perf ... المزيد  


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