An animal study is being conducted to determine the effect of vitamin C on the development of common cold. The researcher gives one group of rats the vitamin C pills, and the other group of rats gets the "dummy" pill (placebo). The rats that received the placebo would be called the:

Question

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The rats that received the "dummy" pill (placebo) are the control group. They are used as a comparison to the experimental group (rats that received vitamin C) to determine the effectiveness of the intervention. The dummy group, double-blind group, and intervention group are not accurate descriptors of this specific set of rats.

An Animal Study Is Being Conducted to Determine the Effect