Independent Variable in Research
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Questions and Answers

What is an independent variable (IV) in a research study?

  • The variable that is affected by the manipulation of the IV
  • The outcome of the study
  • The variable manipulated by the researcher (correct)
  • The variable measured by the researcher

    • How many levels can an independent variable have in an investigation?

  • Three levels
  • Two levels (correct)
  • One level
  • Unlimited levels

    • In a study examining the influence of caffeine on performance, what would be the independent variable (IV)?

  • The participants
  • The level of caffeine (correct)
  • Work performance
  • The outcome of the study

    • What is a dependent variable (DV) in a research study?

    <p>The variable measured by the researcher</p> Signup and view all the answers

    Why should the dependent variable (DV) be affected by the manipulation of the independent variable (IV)?

    <p>To show a cause-and-effect relationship</p> Signup and view all the answers

    How can one identify the dependent variable (DV) in an investigation?

    <p>By looking at what is being measured</p> Signup and view all the answers

    Why is it important to operationalize variables in a study?

    <p>To make them specific and detailed for measurement by other researchers</p> Signup and view all the answers

    What is the term used for factors in an investigation that may interfere with the IV or DV?

    <p>Extraneous variables</p> Signup and view all the answers

    If an extraneous variable affects the outcome of a study, what is it called?

    <p>Confounding variable</p> Signup and view all the answers

    What do demand characteristics in a study refer to?

    <p>Clues provided by participants about the study's purpose</p> Signup and view all the answers

    Why are extraneous variables important to control in a study?

    <p>To enhance the validity of the study</p> Signup and view all the answers

    How do confounding variables affect research outcomes?

    <p>By distorting the true relationship between variables</p> Signup and view all the answers

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