no. 3.] PSYCHOLOGICAL EXAMINING IN THE. UNITED STATES ARMY. 571 



out in chapter 2 of Part III. This plan was adopted with the intention of completing 

 the scheme of analysis before any work upon the Hollerith sortings was undertaken. The 

 cards of Group X were to be used as its statistical basis and the 136 correlation tables between 

 the eight tests of alpha and the seven tests of beta were prepared by officers of the staff of the 

 Section of Psychology during two weeks in February when they were permitted the use of the 

 Hollerith machines in the Surgeon General's Office during the evening. 



Statistical work on the scheme of combination began late in February and it was hoped 

 that it might be completed by the time that the Hollerith sortings were ready for use. The 

 task, however, proved to be very much greater than had been at first supposed and the scheme 

 was not completed until the first few days in June. By this time most of the manuscript for 

 Part III was well under way. It had been necessary to assign June 15 as the final date for all 

 manuscripts. Accordingly it was not possible to use the scheme widely in the other chapters 

 of Part III. The scheme is presented in detail because it is in itself a valuable contribution 

 to statistical method in the treatment of tests, because it furnishes more light on the nature 

 of the separate tests in the group examinations and of their interrelations than could any other 

 treatment, and because it provides the basis for further research should such opportunity 

 arise. 



The manuscript for Part II was completed, with the exception of editing, on May 1. At 

 this time, however, the personnel of the Section of Psychology was considerably diminished. 

 Throughout the month of May there were available for work on this report Capt. Boring, Lieut. 

 Lincoln, Lieut. May, and Mr. Brown. Capt. Boring was obliged to give considerable time to 

 the editing of Parts I and II during May. Miss Cobb and Lieut. Mertz gave part time to the 

 report. Since Lieut. May and Mi-. Brown were entirely engaged in statistical work, the writing 

 of all the subsequent chapters, with the exception of a few that had been prepared earlier 

 during the winter, devolved upon three psychologists. Clerical help was also diminished on 

 the first of May, so that the authors had very little assistance. Sergt. First Class B. M. Oppen- 

 heim, who prepared the original drawings for the figures of Parts II and III, was retained as 

 draftsman until July 1. During the first two weeks of June Lieut. Metcalf was added to the 

 group of authors and Miss Cobb gave full time. This shortage of personnel is responsible for 

 a less thorough treatment of many of the topics than could be desired. The general plan 

 agreed upon to meet the emergency was the printing, with a view to future research, of as 

 much of the original data coming from the Hollerith sortings as possible, and then a more 

 superficial discussion of such principal results as could be arrived at by a simple statistical 

 treatment of the tables. 



The reader of the chapters of this part will find, in accordance with this plan, that in 

 general chapters which are based upon data from the Hollerith analysis begin with a set of 

 tables from the principal sample. These tables are followed by such discussion as is feasible 

 and additional tables which are immediately relevant to the discussion. It was planned to 

 print in every such case seven tables of Hollerith sortings which it is presumed will furnish an 

 adequate basis for any form of statistical treatment that may be desired in the future. The 

 seven tables are as follows: 



1 . Alpha scores of men taking examination alpha only. 



2. Beta scores of men taking examination beta only, or examination beta with 



examination alpha only. 



3. Total score of all men taking performance examination, with or without a group 



examination. 



4. Total score of all men taking point scale examination, with or without a group 



examination. 



5. Mental ages of all men taking Stanford-Binet examination, with or without a 



group examination. 



6. Alpha scores of all men who took alpha, with or without beta and with or without 



an individual examination. 



7. Beta scores of all men who took beta, with or without alpha and with or without 



an individual examination. 



