Driving to school one Rainy day, Marco narrowly misses a car that slides through a red light. "Slow down! What a terrible driver," he thinks to himself. Moments later, Marco himself slips through an
intersection and yelps, "Wow! These roads are awful. The city plows need to get out here."

Using the attitudes-follow behavior principle, how might you go about changing that attitude?

What social psychology principle has Marco just demonstrated? Explain.