In a laboratory, smokers are asked to drive using a computerized driving simulator and cover the maximum distance possible, while avoiding rear-end collisions
Some volunteers are given a real cigarette to smoke immediately before the test. Others smoke a fake cigarette without nicotine. The number of collisions the two groups make is to be compared. The control group in this scenario consists of ________.
a. volunteers who smoke real cigarettes.
b. volunteers who smoke fake cigarettes.
c. all the experimenters.
d. all the volunteers.
Answer: b
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