"Several researchers want to compare the effects of differential exposure to violent TV shows on children’s behavior. They wante
d to see whether watching those types of shows once a week, twice a week or three times a week would affect the number of aggressive behaviors that the children displayed during the week. If researchers measured the effect size and concluded that they would need 20 subjects in each condition for results to be statistically significant, then for repeated measures design they would need ______________ subjects."
According to my research on the repeated measure design, I can say that based on the information provided within the question for this design they would need exactly 20 subjects. This can be said because the repeated measure design is a research method in which the same test subjects are used more than once for different treatments. Which in this case would be three different treatments, and since the scientists concluded they need the same amount of subjects for each treatment then they can use the same 20 subjects for all three treatments.
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The correct answer should be D. The classes are more challenging.
Whether something is challenging or not is not a benefit and is pretty subjective as something may be more or less challenging to different individuals.
