A person's defence against a highly persuasive can be bolstered by prior exposure to a much weaker argument. Again this provides an opportunity to develop counterarguments, which are easier to find against the weak message. Then when they are exposed to the full strength message, they are better equipped to resist. This principle is often used in teenage antismoking programs. A major cause of smoking at this age is peer pressure.
Many programs give students the chance to rehearse resisting such pressures through role plays.