. . . . . "Raven's progressive matrices is a nonverbal test series which aids in assisting mental ability by requiring the examinee to solve problems presented in abstract figures and designs. The test correlates well with comprehensive intelligence tests. The Mill Hill vocabulary scales provide a measure of acquired verbal knowledge that supplements nonverbal reasoning ability information yielded by Raven's progressive matrices." . . . . "[Raven's progressive matrices and vocabulary scales]" . "Vocabulary scales" . . . . "Progressive matrices" . . . . . .