Ginkgo Biloba Is a Herb That Is Thought to Increase

question 16

Multiple Choice

Ginkgo Biloba is a herb that is thought to increase blood flow in the brain and enhance memory processes. In a carefully controlled study investigating this claim, young adults were assigned to one of three groups. Those in group 1 took a capsule containing 120 milligrams of ginkgo biloba once a day. Those in group 2 took a capsule that looked identical but was a fake. Those in group 3 did not take any capsules. The participants assigned to group 2 constituted the _____ in this study.

• A)dependent variable
• B)placebo group
• C)extraneous group
• D)out-of-control group

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Definitions:

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