148 VITALITY AND EFFICIENCY WITH RESTRICTED DIET. 



grip; continuous discrimination in finding serial numbers; efficiency in 

 traversing the maze; and the clerical tasks). In these tests two men 

 could work in the same room at the same time without disturbing each 

 other. The subjects were located at two well-lighted tables placed 

 some distance apart and not facing each other. The assistant, Mr. 

 J. I. Waldron, whose careful service we were fortunately able to secure, 

 occupied a position between them. The working conditions were made 

 satisfactory to the men. One subject filled out the clerical test blank 

 while the other completed tests Nos. 11 and 16. The time required 

 for each subject to do his particular task was recorded by the assistant 

 in seconds and fractions on a suitable form. The men then exchanged 

 position and tasks. The strength of grip was usually taken after the 

 other tests in room A were completed, and frequently one subject 

 looked on while another subject was being tested. Each subject 

 made a pulse count on himself when he had completed the clerical blank. 



Room B contained measurements Nos. 8, 10, and 15 (patellar reflex, 

 word reactions, and finger movements). The general set-up for these 

 three measurements is shown in figure 31, p. 160. They formed a con- 

 venient group, since they all relied on the Blix-Sandstrom kymograph 

 for chronographic record. The experimenter tested the subjects indi- 

 vidually. The word reactions were always given as the first test, this 

 being followed by the three finger-movement records. Between the 

 finger-movement records there was an interval of one minute. In the 

 first interval the subject was asked for any observations concerning 

 his general condition. In the second interval, or that between the 

 second and thu-d finger-movement records, a pulse count was taken 

 by the experimenter at the wrist. Following the last finger-movement 

 record, the subject changed chah-s and reclined in a steamer chair for 

 the patellar reflex measurement, following which a second pulse count 

 was made by the experimenter. The time required to complete the 

 tests in room B was from 17 to 20 minutes. The subject was then sent 

 to room A or C, if he had not previously had the measurements in 

 these places. 



In room C, which is the main psychological laboratory, measure- 

 ments Nos. 12 and 13 were given. The threshold for electric shock was 

 always first and that for visual efficiency came second. There was a 

 shift of position and a slight intermission between the measurenaents 

 and 8 to 10 minutes devoted to each one. There were, of course, indi- 

 vidual differences, and it was not possible to take exactly the same 

 amount of data on each man. When the measurements had been com- 

 pleted or the time interval allowed had elapsed, the subject was sent to 

 another room or upstairs.^ The two measurements were taken by Mr. 



1 Some latitude in time for testing a particular man was naturally allowed, but in general, a 

 serious effort was made to maintain a schedule, as it was only on this basis that it was 

 possible to teat 12 men in such a variety of ways within a period of 3 to 3 i hours. 



