You have designed an experiment to test a new drug. You prepare the injection doses of the drug and a placebo and label them with different letters. Then, you hire research assistants to give the injections and to collect data from the participants. Neither the research assistants nor the participants will know which injection is the drug or the placebo, or whether a participant is in the experimental or the control group. You have
A) created a placebo effect.
B) designed a single-blind experiment.
C) designed a double-blind experiment.
D) created a self-fulfilling prophecy.

Question

Quizplus · Accepted Answer

This is a double-blind experiment because both the participants and the research assistants do not know who is receiving the actual drug or the placebo, preventing bias in the administration and data collection.

You Have Designed an Experiment to Test a New Drug