Q: What is a blind or blinded experiment?
A: A blind or blinded experiment is a test or experiment in where the experimenter does not know which treatment is given to a subject.
Q: Why is a blind or blinded experiment used?
A: A blind or blinded experiment is used to avoid bias which the experimenter might otherwise introduce.
Q: What is a double-blind trial?
A: A double-blind trial is a trial where both tester and subject are blinded.
Q: In what kind of experiment should the identities of the product be hidden?
A: In an experiment where consumers are asked to compare the tastes of different brands of a product, the identities of the product should be hidden.
Q: Why should the identities of the product be hidden in a taste comparison experiment?
A: The identities of the product should be hidden in a taste comparison experiment to avoid consumers preferring the brand they are familiar with.
Q: In what kind of experiment should both patients and experimenter not know the dosage being given in each case?
A: In a pharmaceutical drug testing experiment, both patients and experimenter should not know the dosage being given in each case.
Q: What is the opposite of a blind trial?
A: The opposite of a blind trial is an open trial.