During 1943 the scope of the work of the training groups 

 was greatly expanded necessitating the addition of a number of 

 new members, Synthetic trainer groups, similar to that at TJCDWR, 

 were established at other Division 6 laboratories. 



The training personnel at both schools at first confined 

 their efforts to making specific suggestions for the correction 

 of obvious defects 9 such as the elimination of unsupervised 

 study and needless standby time., Later, as they became more 

 familiar with the training problems, the Division 6 personnel 

 worked directly with instructors in planning major revisions 

 in course schedules. An increase in the supply of standard 

 equipment and synthetic training devices permitted greater em- 

 phasis to be placed on operating drills and laboratory work. 



One of the first problems was the measurement of student 

 performance as contrasted with student knowledge , In the de- 

 sign of synthetic trainers, emphasis was placed upon designing 

 them so that they would measure performance directly. In the 

 case of other trainers, and for standard equipment on training 

 ships, checking systems were devised which enabled the instructor 

 to check and rate the student on each part of a series of complex 

 operations. The checking systems proved not only useful for 

 gradingj, but also for showing up weak spots in training, 



NDRC personnel also devoted considerable time and effort 

 to an informal program for the training of Navy instructors, 

 though the effectiveness of instructor training was somewhat 

 limited by the Navy system of personnel rotation „ Nevertheless, 

 members of the training group were helpful in aiding instructors 

 in planning their lectures and drills and in coaching them In 

 effective methods of presentation, The introduction of new 

 equipment and of new synthetic training devices provided many 

 opportunities to demonstrate better teaching methods. 



The Division 6 training personnel produced a large quan- 

 tity of training aids such as instruction books, phonograph 

 recordings, slides and films , and wall charts. Among the most 

 valuable training aids were phonograph recordings of under- 

 water sound. In all f some 300 recordings were made for anti- 

 submarine warfare sonar training. The first of these con- 

 tained examples of underwater sound to be used for classroom 

 demonstration. Then, in order to increase student participa- 

 tion, drill and test recordings were prepared. 



- 113 



