564 VITALITY AND EFFICIENCY WITH RESTRICTED DIET. 



table that show 100 per cent correct judgment. These are usually 

 with increments of 5 and 3 vd. Gul had a final average (see average 

 at bottom of table 149) of 100 per cent correct judgment with 5 vd., 

 99 per cent with 3, with 91 per cent and 77 per cent for 2 and 1 vd., 

 respectively. Conventionally, the pitch discrimination threshold is 

 considered to be that difference or increment which shows 75 per cent 

 of correct judgment. According to this, GuVs threshold was 1 vd. 



' Besides McM, Kim, Mac, and Sch, subject Van is also excluded from this average, as he shows 

 low and irregular values. 



