UTAH ACADEMY OF SCIENCES 213 
(3) those who are not affected by the social stimulus; (4) 
those whose work is not variable from time to time. 
In conclusion I would point out that one of the es- 
sential elements in voluntary control as revealed by these 
studies is the time period which must precede a perfor- 
mance. Since this period is long for some and short for 
others, and since the time period necessary for an accurate 
performance is lengthened by drug stimulants such as 
strychnine and caffein, it seems clear that the phase of 
control which we have measured is fundamentally a pro- 
cess of neural integration or upbuilding which in turn 
conditions the accuracy output of the subject, especially 
the temporal conditions of that output. The integration 
proceeds at different rates in various individuals and is 
probably going on all the time but, with respect to any one 
performance, if the anabolism would exceed the katabolism 
the subject must have a cessation of activity in that per- 
formance. The anabolism is preserved by the elimination 
of all drugs and the katabolism hastened by the adminis- 
tration of them. This anabolism is greatly aided by the 
practice of all those economies and abstinences generally 
found to favor health and bodily vigor. 
