Provenance Figure modified from Piaget, J., & Inhelder, B. (1967). The child’s conception of space (F. J. Langdon & J. L. Lunzer, Trans.). New York: Norton. (Original work published 1948). Fair use claimed for use in commentary.
Reuse If you wish to use this item outside this site in ways that exceed fair use (see http://fairuse.stanford.edu/) you must seek permission from its creator.