Age or Grade Equivalents
Age and grade equivalents reflect the age or grade level at which average score is same as subject's raw score.
A grade or age quivalent is another way to compare a student to the standardization sample. If a student receives a grade equivalent of 2.0, it means the student scored the same as the mean (average) raw score of all the second grade students in the standardization sample. For example, if a student's raw score is 25 and the mean raw score for second-grade students in the standardization sample is 25, then the grade equivalent is 2.0. Age equivalents work the same way, except the score represents a comparison to the individuals in the standardization sample that are the same age (Mercer & Pullen, 2009, p. 92).