10 Questions
What is the purpose of having a control group in an experiment?
To measure the change due to extraneous variables
What is the assumption about the effect of chance variables?
It has a negligible impact on the dependent variable
What are the two primary sources of chance variation?
Research instrument and respondents
What is the purpose of randomization in an experiment?
To ensure extraneous variables have a similar effect on control and experimental groups
What is the purpose of matching in an experiment?
To ensure extraneous variables have a similar effect on control and experimental groups
When is it possible to eliminate an extraneous variable?
When there is a strong correlation between the extraneous variable and the dependent variable
What is the purpose of building an extraneous variable into the study design?
To isolate the impact of the extraneous variable
How can an extraneous variable be eliminated?
By eliminating the variable
What is the purpose of using a control group and an experimental group?
To measure the effect of the independent variable
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
Learn about the different types of bias in clinical trials, including performance bias and detection bias. Understand how these biases can affect the results of a trial and the importance of minimizing them.
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