Threats to Internal Validity in Experimental Design Quiz
Explore challenges like history, testing, mortality, and more in experimental design. Test your knowledge with these 12 questions.
#1
Which of the following is a threat to internal validity in experimental design?
Regression to the mean
Maturation
Selection bias
Experimenter bias
#2
What is the primary purpose of random assignment in experimental design?
To ensure all groups are equivalent at the start of the study
To control for extraneous variables
To eliminate the need for a control group
To increase the external validity of the study
#3
What is the purpose of using a control group in an experiment?
To provide a comparison for the experimental group
To increase the variability of the data
To ensure random assignment
To prevent experimenter bias
#4
How can random selection of participants enhance the internal validity of an experiment?
By ensuring that all participants have an equal chance of being assigned to each group
By controlling for extraneous variables
By preventing experimenter bias
By increasing the generalizability of the findings
#5
In experimental design, what does the term 'history' refer to?
The passage of time
External events affecting the outcome
Participant dropout
Sampling bias
#6
What is a potential way to mitigate the threat of 'testing' in an experimental study?
Increasing the sample size
Using a placebo control group
Changing the measurement instrument
Implementing a crossover design
#7
Which of the following is a characteristic of a true experimental design?
Random assignment
Observational data collection
Non-manipulated independent variable
No control group
#8
Which of the following best describes the threat of 'mortality' in experimental design?
Participants becoming physically ill during the study
Loss of participants from the study over time
Changes in the dependent variable due to aging
The presence of outliers in the data
#9
Which of the following is an example of a potential confounding variable in an experiment investigating the effects of a new medication?
The dosage of the medication
The gender of the participants
The temperature in the room
The height of the researcher
#10
Which of the following is a potential solution to the threat of 'instrumentation' in experimental design?
Increasing the sample size
Implementing a double-blind procedure
Using a within-subjects design
Changing the research hypothesis
#11
How can researcher bias affect internal validity in an experiment?
By influencing participant behavior
By introducing confounding variables
By affecting the measurement process
By increasing external validity
#12
How does the placebo effect relate to internal validity in experimental design?
It strengthens the external validity of the study
It creates demand characteristics
It can confound the results by influencing participant behavior
It increases the likelihood of regression to the mean
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