An Experimenter Studies the Relationship Between Caffeine and Reaction Time

question 53

Multiple Choice

An experimenter studies the relationship between caffeine and reaction time.She designs her experiment with four groups.Group one receives 100 mg of caffeine each in their cups of coffee; group two receives 200 mg of caffeine each in their cups of coffee; group three receives 300 mg of caffeine each in their cups of coffee; and group four 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 four
• B)group three
• C)group two
• D)group one

---

Definitions:

Empiricism

The theory that knowledge originates from experience and that evidence from the senses is a primary source of knowledge.

Structuralism

A theory in psychology and sociology focusing on the components of mental processes, societies, and other phenomena.

Psychiatry

A branch of medicine dealing with psychological disorders; practiced by physicians who sometimes provide medical (for example, drug) treatments as well as psychological therapy.

Cognitive Neuroscience

The study of the neural mechanisms underlying cognition, focusing on the neural connections involved in mental processes.