Which of the following is an accurate statement regarding the differences between extraneous and nuisance variables?
a. Nuisance variables vary with the independent variable and extraneous variables are the same for all groups of participants.
b. Extraneous variables vary with the independent variable and nuisance variables are the same for all groups of participants.
c. Nuisance variables focus on issues related to the experimental design and extraneous variables focus on issues related to participants.
d. Extraneous variables are not manipulated by researchers but nuisance variables are.
B
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