Dr. Bellanca is designing a study to measure the effect of a friendship intervention on bullying in middle school
Group A receives extra classes in an unrelated topic, Group B receives extra classes on friendship once a month, and Group C receives extra classes on friendship once a week. She hypothesizes that Group C will show the greatest reduction in bullying. What is the independent variable in this study?
a. the age of the children
b. the reduction in bullying
c. the frequency of the intervention
d. the number of students who take part in the intervention
Answer: C
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