The GAT is a standardized assessment of an applicant's general reasoning ability, and it measures observation skills, problem solving ability as well as learning capacity. The GAT provides an objective measure that is free of language and cultural bias. All the information needed to respond to each question is presented within the test item itself. Clear instructions will be given to ensure that applicants understand how to attempt the test. The GAT tells whether a student has strong underlying mental capabilities, and this is different from how well a student performs in exams.
In contrast, Achievement Tests are subject-based tests that assess a candidate’s learned skills or knowledge. Doing well in Achievement Tests can at times be associated with being well drilled in exam-taking techniques, studying extremely hard on a subject, etc. It may not sieve out students with strong mental abilities, but who may not do well in exams due to emotional problems, challenging family situation, low motivation, and so forth.
Ability Tests and Achievement Tests complement each other, and shed light on different aspect of school applicants. Used together, they provide a good gauge of the overall quality of applicants.
