168 VITALITY AND EFFICIENCY WITH RESTRICTED DIET. 



47 

 41 



Vt 



1 27 



SO 

 14 



43 



7 



26 18 



IS 



49 



16 

 ^0 



2 ^0 

 29 9 



44 



front of the subject at the usual reading distance. He used a long 

 pencil with a rubber eraser on the end and touched the numbers in turn 

 with the rubber end, but did not speak them aloud. An assistant took 

 the total time with a stop-watch and observed the entire performance 

 to make sure no numbers were skipped. 



In order to repeat the experiment with the same subject at different 

 sessions, five different test blanks were prepared. The numbers placed 

 on the sheets were half-inch, black, gummed figures. When the first 

 sheet had been prepared with the numbers in position, as illustrated in 

 figure 37, the next sheet was made by advancing each number one 

 position on the sheet. 

 Thus, on the second 

 sheet, 2 was put in the 

 position occupied by 1 

 on the first sheet, and 

 thus throughout, until 

 finally 1 was placed in 

 the position occupied 

 by 50 on the first sheet. 

 On the third sheet the 

 numbers were ad- 

 vanced one position 

 from that given them 

 on the second sheet, 

 and so on for all of the 

 blanks. Thus, the 

 movements required in 

 pointing to all of the 

 numbers successively 

 on a blank was, except 

 for the start and finish, 

 identical for all blanks, 

 and could be assumed 

 to be equally difficult. 

 Neither the subject nor 

 the assistant who took 

 the time knew how the 

 blanks were made up. No one blank was used in successive experi- 

 ments on the same group of subjects. A more analytical result than 

 the total time would have been desirable, but could not be conven'ently 

 arranged under the experimental circumstances and the time available. 

 Naturally the single digits 1 to 9 could be most easily located. This 

 served the useful purpose of giving the individual a satisfactory start. 

 The test required from 1 to 4 min utes.^ 



1 To one watching from the side or over the shoulder of the subject the whole group of numbers 

 occupies a position much nearer the center of the visual field. The individual numbers are more 

 easily located. It is particularly important that the operator should in no way indicate amuse- 

 ment when the subject seems unable to locate some certain number. 



39 



48 

 20 



8 

 3 



34 



23 

 4S 



4 

 W 



32 



30 ^0 

 13 



36 



33 



2f -^ 

 24 



3^ 



31 



37 

 46 



Fig. 37.— "The Taylor Numbers." The numbers 1 to 50 ar- 

 ranged in an irregular order as in one of the test sheets. 



