In order to avoid the problem of the placebo effect, a researcher could do which of the following?

Your friend is a whiz when it comes to maps. He decides to create a computerized map showing the countries where eating disorders are likely to occur. He asks you for assistance in creating this visual image. What will you tell him?

a. These disorders occur in nearly all societies. b. These disorders occur only in the United States and Canada. c. These disorders occur in cultures with small population growth. d. These disorders occur almost exclusively in North America, Europe, and industrialized Asian countries.

In presidential election campaigns, many television ads focus on the "negatives" of an opponent. Campaign managers are obviously aware that when people are forming impressions, they tend to ____

a. ?give others the benefit of the doubt b. ?focus most on self-serving biases c. ?view negative information as more important than positive information d. ?believe what they see and hear on television over what they read in newspapers and hear on the radio