In one study a group viewed actual drug ads, and nearly two-thirds of the group overestimated the drug effectiveness: "They believed it was 10 times more effective than it actually was"! But another group was shown ads with information clearly presented in a simple "drug-facts box." Three-quarters of this group "correctly assessed the actual benefits of the treatment."
This study shows us a lot about how presentation of evidence can affect an argument. It appears that different arrangements of the same evidence can lead the audience to very different conclusions. It also suggests an interesting research topic for Unit 3. How should drug advertisements be regulated? Should they be designed to educate patients, or to simply sell product?