Definition: Some test scores are reported as age equivalent test scores. Simply put, an age equivalent is a comparison of your child's performance compared to age groups whose average scores are in the same range. For example, if your 9 year old child scores a 42 raw score on a test, and that score is average for 8 year olds, his age equivalent score would be 8.
Also Known As: mental age, test age
Age equivalent scores are not usually considered the most precise scores for measuring a student's performance on tests.