title: The significance of practice effect upon readministration of the Grace Arthur Performance Scale to high grade mentally deficient children.
authors.forename: R M
authors.initials: RM
authors.lastname: PATTERSON
mesh_terms: D002648:Child; D006801:Humans; D008607:Intellectual Disability; D007361:Intelligence Tests; D019989:Persons with Intellectual Disabilities; D019233:Retreatment