Ayer, F. C.—The Psychology of Drawing; Warwick and York, Baltimore, 1916.
Binet, A.—“La psychologie artistique de Tade Styka”; L’année psychologique, 1908.
Childs, H. G.—“Measurement of the Drawing Ability of Two Thousand One Hundred and Seventy-seven Children in Indiana School Systems by a Supplemented Thorndike Scale”; Journal of Educational Psychology, 1915.
Elderton, E.—“On the Association of Drawing with Other Capacities in School Children”; Biometrika, 1910.
Fischlovitz, A.—An Inductive Study of the Abilities Involved in Drawing; Columbia University, 1903.
Jones, E. E.—“The Correlation of Visual Memory and Perception of Perspective with Drawing Ability”; School and Society, 1922.
Ivanof, E.—“Corrélation entre l’aptitude au dessin et les autres aptitudes”; Archives de psychologie, 1908.
Kerschensteiner, G.—Die Entwicklung der zeichnerischen Begabung; Gruber, Munich, 1905.
Kik, C.—“Die übernormale Zeichenbegabung bei Kindern”; Zeitschrift für angewandte Psychologie, 1908.
Manuel, H. T.—A Study of Talent in Drawing; Public School Publishing Company, Bloomington, Ill, 1919.