DAVIES, D M THE DIFFICULTY AND GRADED SCORING OF ELITHORN'S PERCEPTUAL MAZE TEST. [electronic resource] - British journal of psychology (London, England : 1953) Aug 1965 - 295-302 p. digital Publication Type: Journal Article ISSN: 0007-1269 Standard No.: 10.1111/j.2044-8295.1965.tb00968.x doi Subjects--Topical Terms: HumansIntelligence TestsPerceptionPsychometrics