It's not as easy as you think, and research shows that many of us have a hard time telling the difference.

Big Pharma spends $3 billion per year on direct-to-consumer advertising -- do they make people feel sicker?

Watch some of the milestone moments in manipulative political TV ads.

As drug costs increase, are advertising agencies influencing the research behind your medication? And at one Mississippi high school, a former civil rights activist is using math to change his students' lives.

Bill Moyers examines the power of professional pollsters to influence public opinion.

Bill Moyers interviews communications experts about how the power of visual imagery in advertising challenges shapes the way people view the world and themselves.

Bill Moyers examines the growth of mass communication and the birth of the concept of public relations.