References
- In part supported by Project Zero of the Harvard Graduate School of Education operating under National Science Foundation Grant # GB-31064.
- Arnheim, Rudolf. Art and visual perception. Berkeley, California: University of California Press, 1965.
- Berner, Eta. Private speech and role-taking abilities in pre-school children. Unpublished doctoral dissertation, Harvard Graduate School of Education, 1971.
- Flavell, John. The development of role-taking and communication skills in children. New York: John Wiley, 1968.
- Gombrich, Ernst. Art and illusion. Princeton: Princeton University Press, Bollingen Series, 1960, 233–234.
- Goodenough, Florence. Measurement of intelligence by drawing. New York: Harcourt, Brace & World, 1926.
- Goodnow, Jacqueline. Rules and repetoires, rituals and tricks of the trade: Social and informational aspects to cognitive representational development. In Farnham-Diggory, S. (Ed.) Information processing in children. New York: Academic Press, 1972, 83–102.
- Hochberg, Julian. Perception. Englewood, New Jersey: Prentice-Hall, 1964.
- Korzenik, Diana. Visual definitions: Communication in children's drawings. Unpublished manuscript, Harvard Graduate School of Education, 1971.
- Kramer, Edith, Ary therapy in a children's community. Springfield, Illinois: C. Thomas, 1958.
- Kraus, R. and Glucksberg, S. Referential communication in nursery school: Method and some preliminary findings, Journal of Experimental Psychology, 1966, 3, 333–342.
- Piaget, Jean. Play, dreams and imitation. New York: Norton, 1962.