Understanding Bias in Clinical Trials
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Questions and Answers

What is the purpose of having a control group in an experiment?

  • To ensure respondents answer accurately
  • To measure the change due to extraneous variables (correct)
  • To measure the change due to the independent variable
  • To eliminate chance variables

    • What is the assumption about the effect of chance variables?

  • It has a negative impact on the dependent variable
  • It has a significant impact on the dependent variable
  • It has a negligible impact on the dependent variable (correct)
  • It has a positive impact on the dependent variable

    • What are the two primary sources of chance variation?

  • Research instrument and respondents (correct)
  • Control group and experimental group
  • Dependent variable and chance variables
  • Independent variable and extraneous variables

    • What is the purpose of randomization in an experiment?

    <p>To ensure extraneous variables have a similar effect on control and experimental groups</p> Signup and view all the answers

    What is the purpose of matching in an experiment?

    <p>To ensure extraneous variables have a similar effect on control and experimental groups</p> Signup and view all the answers

    When is it possible to eliminate an extraneous variable?

    <p>When there is a strong correlation between the extraneous variable and the dependent variable</p> Signup and view all the answers

    What is the purpose of building an extraneous variable into the study design?

    <p>To isolate the impact of the extraneous variable</p> Signup and view all the answers

    How can an extraneous variable be eliminated?

    <p>By eliminating the variable</p> Signup and view all the answers

    What is the purpose of using a control group and an experimental group?

    <p>To measure the effect of the independent variable</p> Signup and view all the answers

    What is the benefit of using randomization and matching in an experiment?

    <p>To ensure extraneous variables have a similar effect on control and experimental groups</p> Signup and view all the answers

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