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ThePsychological Review

EDITED BY

WITH THE CO-OPERATION OF

ALFRED BINET, ÉCOLE DES HAUTES-ÉTUDES, PARIS;
JOHN DEWEY, H.H. DONALDSON, UNIVERSITY OF CHICAGO;
G.S. FULLERTON, UNIVERSITY OF PENNSYLVANIA;
G.H. HOWISON, UNIVERSITY OF CALIFORNIA;
JOSEPH JASTROW, UNIVERSITY OF WISCONSIN;
G.T. LADD, YALE UNIVERSITY;
HUGO MÜNSTERBERG, HARVARD UNIVERSITY;
M. ALLEN STARR, COLLEGE OF PHYSICIANS AND SURGEONS, NEW YORK;
CARL STUMPF, UNIVERSITY, BERLIN;
JAMES SULLY, UNIVERSITY COLLEGE, LONDON.

H.C. WARREN, PRINCETON UNIVERSITY, Associate Editor and Business Manager.

Series of Monograph Supplements,Vol. IV. (Whole No. 17), January, 1903.

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Harvard Psychological Studies,

Volume I

CONTAINING

Sixteen Experimental Investigations from theHarvard Psychological Laboratory.

EDITED BY

HUGO MÜNSTERBERG.

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PREFACE.

The appearance of the HARVARD PSYCHOLOGICAL STUDIESdoes not indicate an internal change in the work of the HarvardPsychological Laboratory. But while up to this time the resultsof our investigations have been scattered in various places, andhave often remained unpublished through lack of space, henceforth,we hope to have in these STUDIES the opportunity topublish the researches of the Harvard Laboratory more fullyand in one place. Only contributions from members of theHarvard Psychological Laboratory will be printed in thesevolumes, which will appear at irregular intervals, and the contributionswill represent only our experimental work; non-experimentalpapers will form an exception, as with the presentvolume, wherein only the last one of the sixteen papers belongsto theoretical psychology.

This first volume does not give account of all sides of ourlaboratory work. An essential part of the investigations everyyear has been the study of the active processes, such as attention,apperception, and volition. During the last year severalpapers from these fields have been completed, but we wereunable to include them in this volume on account of the spacelimits; they are kept back for the second volume, in whichaccordingly the essays on the active functions will prevail, asthose on perception, memory, and feeling prevail in this volume.It is thus clear that we aim to extend our experimental workover the whole field of psychology and to avoid one-sideness.Nevertheless there is no absence of unity in our work; it is notscattered work as might appear at a first glance; for while the