A fairly common claim is that young learner drivers should take defensive driving courses so that they know what to do if they lose control of their car. This comes with the implications it will reduce accidents.
Is there any evidence to back up these claims? Or will it encourage more bad driving amongst some groups of drivers?
I understand there are various forms of driver training available and most people who make these claims don't know the difference so any elaboration on this would be helpful for the answer.