The goal of the present study was to extend earlier work on the estimation of person theta using maximum likelihood estimation in R by accounting for rapid guessing. This paper provides a modified R function that accommodates person thetas using the Rasch or 2PL models and implements corrections for the presence of rapid guessing or informed…

This study aimed to compare the readability levels of the reading passages in the General Aptitude Test (GAT) and those of English textbooks for the Upper Secondary Level in Thailand. The corpus of the General Aptitude Tests (C-GAT) was compiled from 70 reading passages on GAT test papers from 2009-2021, and the corpus of English textbooks (C-ET)…

This article describes an approach to test scoring, referred to as "delta scoring" (D-scoring), for tests with dichotomously scored items. The D-scoring uses information from item response theory (IRT) calibration to facilitate computations and interpretations in the context of large-scale assessments. The D-score is computed from the…

Saudi students are required to take the General Aptitude Test (GAT), achieving a certain competency, in order to gain acceptance in matriculation programs, or to study abroad. GAT is surrounded with a great deal of controversy regarding it as a reliable admission factor for measuring a student's aptitude for success in higher education. The…

The study is designed to examine the predictive power of Saudi-admission criteria for student performance in an introductory biology course. It focuses on the second semester at King Saud bin Abdulaziz University for Health Sciences. The study addresses whether the General Aptitude test (GAT), the Scholastic Achievement Admission Test (SAAT), and…

The purpose of the present study was to extend the model of measurement invariance by simultaneously estimating invariance across multiple populations in the dichotomous instrument case using multi-group confirmatory factor analytic and multiple indicator multiple causes (MIMIC) methodologies. Using the Arabic version of the General Aptitude Test…

There is consensus among those involved in teaching English as a foreign language (EFL) in the Saudi educational context that students' achievement in language learning is below expectations. Much research has been directed towards finding the reasons for low achievement amongst learners. However, very few studies have looked at parameters of…

Usually, methods for detection of differential item functioning (DIF) compare the functioning of items across manifest groups. However, the manifest groups with respect to which the items function differentially may not necessarily coincide with the true source of the bias. It is expected that DIF detection under a model that includes a latent DIF…

Item response theory (IRT) methodology is introduced as a tool for improving assessment instruments used with people who have disabilities. Need for this approach in rehabilitation is emphasized; differences between IRT and classical test theory are clarified. Concepts essential to understanding IRT are defined, necessary data assumptions are…

APTITUDE MATURATION RESEARCH COMPLETED IN 1959 MADE IT POSSIBLE TO EXTEND THE USE OF THE GENERAL APTITUDE TEST BATTERY (GATB) TO EDUCATIONAL VOCATIONAL COUNSELING OF NINTH AND 10TH GRADERS. IN AN EFFORT TO EXTEND ITS USE FURTHER, THIS STUDY WAS MADE TO DETERMINE THE EXTENT TO WHICH THE OCCUPATIONAL TEST NORMS VALIDATED ON ADULT SAMPLES PREDICT THE…

Past studies have indicated that job performance in general tends not to decline with age, but performance on at least several aptitudes does decline noticeably with age. If these relationships hold up over the entire occupational range, there is the possibility that aptitude correlations with job performance may be moderated by age. To…

THE NINE APTITUDES MEASURED BY THE GENERAL APTITUDE TEST BATTERY ARE INTELLIGENCE, VERBAL APTITUDE, NUMERICAL APTITUDE, SPATIAL APTITUDE, FORM PERCEPTION, CLERICAL PERCEPTION, MOTOR COORDINATION, FINGER DEXTERITY, AND MANUAL DEXTERITY. THIS MANUAL PRESENTS (1) PERCENTILE EQUIVALENTS OF APTITUDE OR STANDARD SCORES FOR ADULTS, 10TH GRADERS, AND 9TH…

NORMS ARE SHOWN IN TERMS OF CUTTING SCORES FOR EACH OF THE APTITUDES FOUND TO BE SIGNIFICANT FOR THE OCCUPATION. THE STANDARD ERROR OF AN OBTAINED SCORE FOR EACH APTITUDE OF THE GENERAL APTITUDE TEST BATTERY IS APPROXIMATELY SEVEN POINTS. INCLUDED IN THE MANUAL ARE (1) AN ALPHABETICAL INDEX TO APTITUDE TEST BATTERIES, (2) AN INDUSTRIAL INDEX TO…