Volunteers in a study are assigned randomly to groups.Some of the volunteers receive an herbal supplement that is reputed to control nausea,and some of the volunteers are assigned to a control group to which a placebo is administered.This is an example of a(n)
A) longitudinal study.
B) RCT.
C) meta-analysis.
D) appraisal tool.

Question

Quizplus · Accepted Answer

RCTs always involve testing of a treatment through the random assignment of some participants in the study to an experimental or treatment group and others to a control group that receives a placebo.

Volunteers in a Study Are Assigned Randomly to Groups