THE

AMERICAN

Journal of Psychology

EDITED BY

G. STANLEY HALL

E. C. SANFORD
Clark University.⁠AND⁠E. B. TITCHENER
Cornell University.

WITH THE CO-OPERATION OF

F. Angell, Stanford University; H. Beaunis, Universities of Nancy
and Paris; I. M. Bentley, Cornell University; A. F. Chamberlain,
Clark University; C. F. Hodge, Clark University;
A. Kirschmann, University of Toronto;
O. Kuelpe, University of Würzburg;
W. B. Pillsbury, University of Michigan;
A. D. Waller, University of London;
M. F. Washburn, Vassar
College.

VOL. X X I

CLARK UNIVERSITY, WORCESTER, MASS.
Florence Chandler, Publisher
1910