Practice Quiz

EPPP Psychology

Category - Research Methods and Statistics

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A researcher designs a study in which he investigates whether drug A is superior to drug B in elevating the mood of a depressed patient. The independent variable in his study is:
  1. Drug A
  2. Drug B
  3. Depressive mood
  4. Drug A and B
Explanation
Answer: D - Drug A and B collectively are the independent variable.
The term independent variable refers to a variable that is believed to alter the status of the dependent variable. In this example, the independent variable is the drug type and the dependent variable is depressive symptoms.
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