Question
The students concluded that playing violent video games caused a greater
increase in heart rate than watching a violent movie. Some of the students
thought the results of the study to be inconclusive. Can you site a reason why
some students may feel this way?
A
B
C
D
They did not test other ways to increase heart rate as a
method of comparison: running, exercising, walking alone in
the dark.
Only five subjects were tested; they should test a larger group
of randomly chosen subjects.
There was only one control situation; the design should
include at leas two control situations.
They did not test situations that one would expect to lower
heart rate, like playing soothing music or letting students pet a
kitten.
Answer
C. There was only one control situation; the design should include at least two control situations.