Some dogs go so high in drive that they stop thinking. An example of this is when the learning routine is changed just enough to create a mistake. In heeling this can be a speed change in the walk. It can be a right turn or left turn. Some form of compulsion is almost always used before an exercise has been fully trained.
Compulsion takes drive out of the dog.
A perfect example of this is seen in the heeling work. The trainer decides that this session is going to require 15 steps before the dog gets his ball. But as soon as the dog takes 2 or 3 steps in the correct heel position the handler drops the ball and plays with the dog. After doing this 30 times, the dog will learn that every time I get a correction I am going to get my ball if I do what is expected. When that light bulb goes on in our dog's head we will see dogs go up in drive with corrections.