An Experimenter Studies the Relationship Between Caffeine and Reaction Time

question 150

Multiple Choice

An experimenter studies the relationship between caffeine and reaction time.She designs her experiment with four groups.Group 1 receives 100 mg of caffeine each in their cups of coffee,group 2 receives 200 mg of caffeine each in their cups of coffee,group 3 receives 300 mg of caffeine each in their cups of coffee,and group 4 receives no coffee.Twenty minutes later,participants from all the groups are given a reaction-time test. In this experiment,which group is the control group?

• A)group 4
• B)group 3
• C)group 2
• D)group 1

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Definitions:

Information Sources

Various means through which data is gathered, which can include books, journals, websites, and personal interviews, used for research and decision-making.

Diffusion of Innovation

A theory that explains how, why, and at what rate new ideas and technology spread through cultures.

Innovators

Individuals who adopt new ideas or technologies before most others in a society or industry.

Diffusion of Innovation

The method through which an innovative concept, item, or practice disperses across a community or societal structure.