Some standardized mental ability tests include aptitude, intelligence and achievement tests, according to UCDavis.edu. Aptitude tests assess proficiency or ability to learn in a specific area, while intelligence tests measure general mental capability of the test subject. Achievement tests determine the extent of acquired knowledge in a specific area.
An example of an aptitude test is the Differential Aptitude Test, or DAT, which measures language uses and abstract and mechanical reasoning, notes USDavis.edu. Intelligence tests include tests such as the Stanford-Binet Intelligence Scale or the Wechsler Adult Intelligence Scale. Achievement tests, such as the California High School Exit Examination, determine the test takers academic level.