Sandi believes that people who eat at McDonald's are overweight, so she decides to do a naturalistic observation of people who eat at McDonald's. What should most concern us about Sandi's observations?
a) the placebo effect
b) the bystander effect
c) observer bias
d) participant bias
ANS: C, Sandi has a bias about McDonald's customers, which might affect her observations due to a phenomenon known as observer bias.
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Which theory proposes that successful aging occurs when people maintain the interests, activities, and social interactions with which they were involved during middle age?
A. disengagement theory B. activity theory C. continuity theory D. compensational theory
The sickle-cell gene confers immunity against which disease commonly found in West Africa?
A. hemophilia B. diarrhea C. malaria D. anemia
Corticosteroids help inhibit tissue inflammation and increase energy in case of injury during times of stress
Indicate whether the statement is true or false
The strongest correlation is +1 meaning that X perfectly predicts Y, and the weakest correlation is -1 meaning X is unrelated to Y.
a. True b. False