PSYCHOLOGICAL MEASUREMENTS. 



629 



seconds; No. 45 with 85, 41, and 33 seconds; and No. 63, whose time 

 was 77, 40, and 31 seconds. These records are of course exceptional. 

 The score of 19 in the third trial is the shortest time in which any one 

 has so far completed the task. The averages for the three trials in 

 order for the whole group are: 264, 119, and 90 seconds. 



On each evening the subjects of the low-diet research traced com- 

 pletely through the maze but once and, with the exception of Mon, had 

 no other practice. The first trial of our subjects is therefore comparable 

 with that of the aviators. 



^Mon apparently developed a complex against this test; he never succeeded in completing the test at the 

 appointed time. He did do it once or twice out of hours. His results are not included in the average. 

 ^Pea was left-handed and the left hand was used in the tracing-box with right hand on top of box. 

 'The records of Mon, Kon, Spe, and Fre are not included in this average. 

 *No record kept of number of starts on first night. 



In tables 187 and 188 the data are given for Squads A and B. Nine 

 men of Squad A (omitting Kon, Mon, Spe, and Fre, for reasons given 

 in the footnotes to table 187 and elsewhere in the text) show an aver- 

 age in their first performance (September 29) of 270 seconds. This 

 compares remarkably well with the average of 264 seconds for the 

 normal series of 1917. The range aside from Mon, who failed, is from 

 104 to 555 seconds. None of the men performed the test as quickly as 



