In a Laboratory, Smokers Are Asked to Drive Using a Computerized

Multiple Choice

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 experimental 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.