INTRODUCTION TO PART III. 



The preparation of this part of the report was directed by Capt. E. G. Boring, who also 

 planned and superintended the statistical analysis of data of examination by means of the 

 Hollerith system, directed the preparation of the manuscript for Part III, and took an im- 

 portant share of responsibility in preparing the entire manuscript of the report for press. 



Assistance in the preparation of Part III was rendered by Maj. W. S. Foster, who wrote 

 accounts of segregation and tests of literacy, officers' opinions concerning values of intelligence 

 ratings, and varieties of psychological service; by Capt. R. M. Elliott and Lieut. J. T. Metcalf, 

 who brought together material bearing on the intelligence of the negro; by Capt. D. G. Paterson, 

 who prepared the data on the relation of intelligence to occupation; by Dr. J. W. Bridges, who 

 prepared the accounts of the materials of the performance scale and of the abbreviations of the 

 several forms of individual examination; by Miss Cobb, who assembled reports on literacy and 

 schooling, and on organization of the camps; by Lieut. M. A. May, who brought together the 

 information on conscientious objectors and on the time element in the alpha examination, and 

 who, with Mr. Brown, was concerned primarily with mathematical aspects of this report; and 

 by Lieut. E. A. Lincoln, who contributed numerous reports on the differentiation of intelligence 

 ratings with respect to various factors. Further details concerning the responsibility for work 

 on Part III will be found in section 4 of chapter 1, page 570. 



It proved utterly impossible, for the reasons already indicated in the general introduction 



to this report, to satisfactorily analyze and completely present even the obviously important 



data resulting from psychological examination of nearly 2,000,000 men in the United States 



Army. Original records of examination are preserved by the War Department, and it is possible 



that it may prove feasible at some time to make more thoroughgoing and intensive use of them 



for scientific purposes. 



Robert M. Yerkes, 



LieutenaTit Colonel, V. S. R. 



Washington, D. C, May 15, 1920. 



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