A study in which an intervention is coupled with a longitudinal study to ascertain possible long-term effects of the intervention is a(n)
a. long-term intervention study.
b. cross-sectional study.
c. “shortitudinal” study.
d. cohort study.
Answer: a. long-term intervention study.
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A company that manufactures drugs to treat heart disease wants to determine if a new drug and exercise can affect cholesterol levels. What are the independent and dependent variables in this proposed study?
a) The dependent variable is exercise; the independent variables are the drug and cholesterol level. b) The dependent variable is cholesterol level; the independent variables are the drug and exercise. c) The independent variables are the drug and cholesterol level; the dependent variable is amount of exercise. d) The dependent variable is the number of heart attacks; the independent variables are the drug, exercise, and cholesterol level.