The term "comparison group" in research refers to the group of patients in a:

a. nonrandom sample who do not receive a treatment.
b. nonrandom sample who receive a treatment.
c. random sample who do not receive a treatment.
d. random sample who receive a treatment.


ANS: A
If nonrandom methods are used for sample selection, the group not receiving a treatment is referred to as a comparison group.
Subjects in the group that receive a treatment are called the treatment or experimental group. If nonrandom methods are used for sample selection, the group not receiving a treatment is referred to as a comparison group.
Subjects drawn from a random sample who do not receive a treatment are called the control group. If nonrandom methods are used for sample selection, the group not receiving a treatment is referred to as a comparison group.
Subjects in the group that receive a treatment are called the treatment or experimental group. If nonrandom methods are used for sample selection, the group not receiving a treatment is referred to as a comparison group.

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