Volunteers in a Study Are Assigned Randomly to Groups

question 23

Multiple Choice

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.

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Definitions:

Voices

Auditory experiences perceived without an external stimulus, often occurring in conditions such as schizophrenia.

Developing Human Organism

An ongoing process of growth and change in humans, from conception through the entire lifespan.

Fetus

A developing human from approximately the end of the eighth week after conception to the moment of birth.

Conception

The process of becoming pregnant involving the fertilization of an egg by a sperm.