Produced by Bryan Ness, Josephine Paolucci and the Online Distributed Proofreading Team at https://www.pgdp.net. (This book was produced from scanned images of public domain material from the Google Print project.) THE CONDUCT OF MIND SERIES EDITED BY JOSEPH JASTROW VOCATIONAL PSYCHOLOGY VOCATIONAL PSYCHOLOGY ITS PROBLEMS AND METHODS BY H. L. HOLLINGWORTH ASSOCIATE PROFESSOR OF PSYCHOLOGY, COLUMBIA UNIVERSITY WITH A CHAPTER ON THE VOCATIONAL APTITUDES OF WOMEN BY LETA STETTER HOLLINGWORTH, PH.D. CLINICAL PSYCHOLOGIST, BELLEVUE HOSPITAL, NEW YORK CITY D. APPLETON AND COMPANY NEW YORK LONDON 1922 COPYRIGHT, 1916, BY D. APPLETON AND COMPANY Printed in the United States of America TO THADDEUS L. BOLTON FRIEND AND VOCATIONAL COUNSELLOR OF YOUTH * * * * * _It is our business to make both a science and an art of human nature. As in the physical world we select first the material suited to our purpose, then turn the iron into steel and temper the steel for the knife, so in the world of human action we must learn to select the right man, to educate him and to fit him for his exact task. This indeed we try to do in all our social institutions, religions, commerce, systems of education and government. But we work by the rule of thumb--blind, deaf and wasteful. The nineteenth century witnessed an extraordinary increase in our knowledge of the material world and in our power to make it subservient to our ends; the twentieth century will probably witness a corresponding increase in our knowledge of human nature and in our power to use it for our welfare._--J. MCKEEN CATTELL, "Homo Scientificus Americanus," _Science_, April 10, 1903. PREFACE