REFERENCES
On the imagination and play of children, see Norsworthy and Whitley's Psychology of Childhood, 1918, Chapters IX and XII.
For Freud's views regarding dreams, see his Interpretation of Dreams, translated by Brill, 1913.
For a view which, though psychoanalytical, diverges somewhat from that of Freud, see Maurice Nicoll, Dream Psychology, 1917; also C. W. Kimmins, Children's Dreams, 1920.
For studies of play, see Edward S. Robinson, "The Compensatory Function of Make-Believe Play", in the Psychological Review for 1920, Vol. 27, pp. 429-439; also M. J. Reaney, The Psychology of the Organized Group Game, 1916.
On invention, see Josiah Royce, "The Psychology of Invention", in the Psychological Review for 1898, Vol. 5, pp. 113-144; also F. W. Taussig's Inventors and Money-Makers, 1915.