#1
Which of the following is NOT a control technique in experimental research?
Placebo effect
ExplanationA phenomenon where a subject's belief in treatment causes a response, not the treatment itself.
#2
What is the purpose of a control group in experimental research?
To provide a baseline for comparison
ExplanationTo compare the experimental group's outcomes to a group that does not receive treatment.
#3
What is the main purpose of using control techniques in experimental research?
To ensure that extraneous variables do not influence the results
ExplanationTo maintain the internal validity of the experiment by controlling for confounding variables.
#4
What is the purpose of randomization in experimental research?
To ensure every participant has an equal chance of being in any experimental condition
ExplanationTo minimize the influence of extraneous variables and ensure unbiased allocation of participants.
#5
In experimental research, what does it mean when we say a study is 'double-blind'?
Both the researchers and the participants are unaware of who is in the control group and who is in the experimental group
ExplanationTo prevent bias by ensuring neither participants nor researchers know which group they are in.
#6
Which of the following is NOT a threat to internal validity in experimental research?
Regression to the mean
ExplanationA statistical phenomenon where extreme scores tend to move closer to the average upon retesting.
#7
Which of the following is NOT a potential disadvantage of using a factorial design?
Greater sensitivity to random error
ExplanationFactorial designs enhance rather than reduce sensitivity to random error.