The WRAT: grade level differences for various revisions.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D004495:Education of Persons with Intellectual Disabilities; D004521:Educational Measurement; D004522:Educational Status; D006801:Humans; D008607:Intellectual Disability / Q000145:classification*; D007361:Intelligence Tests; D008297:Male