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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?

To ensure extraneous variables have a similar effect on control and experimental groups (C) Signup and view all the answers

What is the purpose of matching in an experiment?

To ensure extraneous variables have a similar effect on control and experimental groups (D) Signup and view all the answers

When is it possible to eliminate an extraneous variable?

When there is a strong correlation between the extraneous variable and the dependent variable (C) Signup and view all the answers

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

To isolate the impact of the extraneous variable (A) Signup and view all the answers

How can an extraneous variable be eliminated?

By eliminating the variable (B) Signup and view all the answers

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

To measure the effect of the independent variable (D) Signup and view all the answers

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

To ensure extraneous variables have a similar effect on control and experimental groups (B) Signup and view all the answers

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