In an experiment studying caffeine intoxication, which of the following would be considered a placebo?
A) water pill
B) caffeine pill
C) green tea pill
D) coffee

Question

Quizplus · Accepted Answer

A placebo is a substance that has no active ingredient, but is given to the control group in a study to see if the effects observed in the treatment group are due to the actual treatment or just a psychological response. In this experiment, a water pill would be considered a placebo because it does not contain caffeine or any other active ingredient that would affect caffeine intoxication. The other options (caffeine pill, green tea pill, coffee) all contain caffeine, which would not be a placebo.

In an Experiment Studying Caffeine Intoxication, Which of the Following