BeyerW.. (1968), Handbook of Tables for Probability and Statistics, The Chemical Rubber Company, Cleveland Ohio.
2.
BrianC., and GoodenoughF.. (1929), ‘Relative potency of colour and form perception at various ages’,Journal of Experimental Psychology, 12, 197–213.
3.
DescoudresA.. (1914), ‘Coleur, forme, ou nombre?’,Arch. Psychology, 14, 305–41.
4.
DoehringD.. (1960), ‘Colour–form attitudes of deaf children’,Journal of Speech and Hearing Research, 3, 242–8.
5.
EysenckH. J.. (1941), ‘A critical and experimental study of colour preference’,American Journal of Psychology, 54, 385.
6.
ForshawG. R.. (1975), ‘Incidence of defective colour vision in students of mathematics at the Institute of Education, Ahmadu Bello University, Zaria’,Nigerian Educational Forum, 2.
7.
GoodenoughF. G.. (1926), The Measurement of Intelligence by Drawings, Yonkers World Book Company, New York.
8.
GranitR.. (1955), Receptors and Sensory Perception: the Aims, Means and Results of Electrophysiological Research on the Process of Reception, Yale University Press.
9.
GrunbergE. M.. (1973), ‘Colour deficient versus colour blind’, Journal of School Health, XLIII, (2).
KaganJ., and Lenkins (1961), ‘Form, colour, size in children's conceptual behaviour’,Child Development, 32, 25–8.
12.
KatzD.. (1942), ‘Studien zur Kinder Psychologies’, Wis. Beitr. Padag und Psychol., Leipzig, 1913, 4, quoted by Colby, M. and Robertson, G. in ‘Genetic studies in abstraction’,Journal of Comparative Physiological Psychology, 33, 303–20.
13.
KouwerB. J.. (1949), Colours and their Character, Nijhof, The Hague.
14.
SuchmanR. G.. (1966), ‘Cultural differences in children's colour and form preference’,Journal of Social Psychology, 70, 3–10.
15.
VernonM. D.. (1965), The Psychology of Perception, University of London Press.