- achievement age divided by chronological age, usually expressed as a multiple of 100. The achievement quotient of a ten-year-old child whose achievement age equals that of the average twelve-year-old is 1.2, or 120. Abbreviation: AQ
- psychol a measure of ability derived by dividing an individual’s achievement age by his actual ageAbbreviation: AQ
- The ratio of actual performance to expected performance or to the norm achieved by individuals of a particular age, usually on a standard achievement test.