INTRODUCTION TO PART I. 



The story of the introduction, development, and conduct of psychological examining in the 

 Army is told with substantial completeness in this part of the report. Attempt has been made 

 to indicate the novelty, practical success, and military value of the work and also to suggest 

 the educational, industrial, and scientific significance of the methods which military demands 

 brought into use. This official history begins with the inception of the idea of the psychological 

 classification of recruits and ends with the termination of the military emergency. 



In order that all of the printed materials of military psychological examining shall be 

 rendered permanently available, they are reproduced in this part of the report. Of primary 

 value to the science of psychology are the forms of the Examiner's Guide. 



In the preparation of Part I of the report the Chief of the Division of Psychology was 

 assisted editorially by Capt. E. G. Boring. 



Robert M. Yebkes, 

 Lieut. Colonel, V. S. R. 

 Washington, D. C, 



May 15, 1920. 



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