Is the aspirin produced by World's Best Pharmaceutical Company better than that of a competitor at relieving headaches? 200 headache suffers are chosen at random.Migraned Testing Service administers the experiment and provides the results evaluation.Three levels are made: participants receive contents from Bottle A, Bottle B, or Bottle C).Other than the fact that one bottle contains placebo aspirin, no other information is given to the testing service regarding the bottles' contents.
A)Single blind, only evaluator is blinded
B)Double blind
C)Single blind, only participant is blinded
D)Neither

Question

Quizplus · Accepted Answer

In a double-blind experiment, both the participants and the evaluators are unaware of which treatment (if any) the participants are receiving. Since the Migraned Testing Service, who administers the experiment and evaluates the results, does not know the contents of the bottles, and the participants also do not know which treatment they are receiving, this setup is a double-blind experiment.

Is the Aspirin Produced by World's Best Pharmaceutical Company Better