Question

What are the differences between an aptitude test and an achievement test? What is the aptitude achievement discrepancy?

Answer 1

Answer to the question is as follows:

The main difference between aptitude tests and achievement tests is thataptitude tests discard previous formation, while achievement tests assess previous knowledge. That's why achievement tests are confined to a specific subject or area of knowledge and are usually applied when a grade or level of study has finished

The "discrepancy issue" has been established as the primary criterion for identifying children with LDs. Unfortunately, discrepancy formulae are controversial, potentially inaccurate, and inappropriate for detecting cognitive deficits. There are three types of discrepancy formulae.

With an aptitude-achievement discrepancy, a disparity exists between a child's intellectual ability (as measured by an intelligence test) and his actual level of academic achievement (measured by an achievement test). Certain LDs (e.g., a short-term memory problem or central processing dysfunction), however, may also affect a child's performance on IQ tests, thereby reducing the discrepancy between aptitude and achievement.