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) Randomized controlled trial (RCT).
C) Meta-analysis.
D) Appraisal tool.

Question

Quizplus · Accepted Answer

The study described is an example of a randomized controlled trial (RCT), where volunteers are assigned randomly to either a treatment group (receiving herbal supplement) or a control group (receiving placebo). This design helps to eliminate bias and provides a more reliable way of determining whether the herbal supplement is effective in controlling nausea.

Volunteers in a Study Are Assigned Randomly to Groups