What do achievement tests primarily measure?

Achievement tests are specifically designed to assess an individual's current knowledge and skills in a particular area. These tests evaluate what the test-taker has learned and how effectively they can apply that knowledge, reflecting their understanding and mastery of specific subjects or tasks at the time of the test.

For example, in educational settings, an achievement test might cover various subjects such as mathematics, science, or language arts, measuring how well students comprehend the material they have been taught. The focus is on assessing the skills and knowledge that have been acquired rather than predicting future performance or potential in new roles. This is why "current skills and knowledge" is the primary measurement of achievement tests.

While other options like future job performance or potential for success in new roles might relate to assessments like aptitude tests or performance evaluations, they are not the main aim of achievement tests, which concentrate specifically on what a person knows and can do at the moment of testing.