Abstract
The author defines the conception of "reaction time" and illustrates its meaning from the point of view of qualifying a driver. Isolated measurements of reaction time are not sufficient for the purposes of qualifying a person for driving of automobiles. It has been acerbated by means of experiments that the normal reaction time of an individual can be stretches by as much as 86% when a diversion intervenes. Women are more afflicted by negative repercussion of diversions than men and more liable to be affected by shock. Reaction time of an individual differs less from that of another person than the reaction time of the same individual passing from normal conditions to those influenced by a diversion.