VI GENERAL INTRODUCTION. 



Entire responsibility for this volume rests with the staff of the Division (later Section) of 

 Psychology in the office of the Surgeon General. So much of the work has been done 

 cooperatively that no formal ascription of credit is possible. The chief service to the Army was 

 rendered by the staffs of examiners in the training camps. It is not possible to do full justice 

 even to those psychologists who submitted to the division field reports of special merit and 

 value. So far as practicable, responsibility and credit for the immediate preparation of this 

 official report are indicated in the statements prefatory to the several parts of the volume. 



The Chief of the Division of Psychology expresses peculiar obligation to three staff officers 

 who together rendered possible the completion of this volume. Maj. Lewis M. Terman assumed 

 responsibility for the preparation of the account of methods; Capt. Edwin G. Boring directed 

 the analysis of results, and after the separation of the Chief of the Division from the service 

 assumed editorial responsibility; Maj. Harold C. Bingham, in addition to assisting in important 

 ways throughout the preparation of the volume, became responsible as Chief of the Section 

 of Psychology for the laborious and thankless task of reading proofs and preparing an index. 



Without the intelligent interest and support of the Secretary of War, Newton D. Baker, 

 and of his assistant, Dr. Frederick P. Keppel (later Third Assistant Secretary of War), and 

 of the Chief of Staff, the establishment of the service of psychological examining in the United 

 States Army would have been impossible. 



The first step toward the introduction of psychological service was taken by Cols. Victor C. 

 Vaughan and William H. Welch, of the Medical Reserve Corps, who as members of the National 

 Research Council and of the staff of the Surgeon General recommended to Maj. Gen. William C. 

 Gorgas that the methods of examining presented by the committee for psychology of the National 

 Research Council be given practical trial. This recommendation was accepted, and the Surgeon 

 General, with the assistance of his chief executive officer, Col. Charles L. Furbush, promptly 

 arranged for official trial of the methods and subsequently facilitated their introduction through- 

 out the Army. 



Substantial assistance was rendered to psychological officers during the early period of the 

 work by Col. Pearce Bailey and Lieut. Col. Edgar King, of the staff of the Surgeon General. 

 From the beginning of his service as Surgeon General of the Army psychological examining 

 had the hearty and effective support of Maj. Gen. Merritt W. Ireland and his staff. 



Among the many other officers who furthered in important ways this new variety of per- 

 sonnel service special mention should be made of Col. Henry A. Shaw, Brig. Gen. E. L. Munson 

 Col. Roger Brooke, Brig. Gens. Robert I. Rees and R. J. Burt, and Col. W. D. Scott. 



Robert M. Yerkes, 



Lieut. Col, U. S. R. 



Washington, D. O, 



May 17, 1920. 



