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Category - Research

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Which of the following is NOT a type of variable that is reflected in a research study?
  1. An independent variable
  2. A dependent variable
  3. An extraneous variable.
  4. A superfluous variable.
Explanation
Answer: D - A superfluous variable is NOT reflected in a research study. The three types of research variables are independent, dependent, and extraneous variables. An independent variable can be manipulated in order to determine the changes in the dependent variable. An extraneous variable, simply stated, is an undesired variable that may affect the dependent variable.
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