Because aptitude tests are designed to measure students’ potential abilities, which are not often measured in high
school tests, the national Center of Testing should work to improve the predictive validity of the GAT to reach or
exceed the predictive ability of HSGPA. Future studies need to examine the GAT’s predictive validity across
university majors. In addition, the high predictive ability of HSGPA highlights the need for university officials in
Saudi Arabia to review and evaluate their programs to take students to different levels of knowledge and skills.
Due to the gender-separated education system in Saudi Arabia, comparison studies by gender should be
conducted to examine whether HSGPA has similar predictive validity for male and female students. Furthermore,
predictive studies across majors should take place to examine whether GAT predictability will vary based on the
student major in the university. Finally, a comparison a cross universities will be informative.