A nurse is designing a study to determine whether a videotape or a written pamphlet is more effective in teaching young women how to perform breast self-examination (BSE)
Which of these actions would provide the best control for a mediating variable?
a. Include identical content in both BSE teaching methods
b. Exclude subjects who already perform BSE on a regular basis
c. Limit the study subjects to women who are heterosexual
d. Determine what breast cancer means to the individual participants
ANS: B
Feedback
A Identical content would help control the experimental variables by standardizing content, but it would not control mediating variables.
B Subjects who were already performing BSE would not be appropriate to include in the study.
C Sexual orientation does not affect a woman's need to perform BSE; it is not a mediating variable.
D The meaning of breast cancer to participants would not control a mediating variable in this situation.
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