In an experiment, some people receive an active drug while others receive a placebo. Neither the subjects nor the people administering the drug know which people got the drug and which got the placebo. This is an example of a(n) ________ procedure.
A) double-blind
B) alternative hypothesis
C) placebo
D) single-blind

Question

Quizplus · Accepted Answer

In a double-blind procedure, neither the subjects nor the people administering the drug know which people got the drug and which got the placebo. This helps to eliminate any bias or expectations that could affect the results of the experiment.

In an Experiment, Some People Receive an Active Drug While