First, explain what it means for the experiment to be double-blind. Choose the correct answer below.

A.

Only the subject knows which treatment the subject is receiving.

B.

Both the subject and the researcher know which treatment the subject is receiving.

C.

Only the researcher knows which treatment the subject is receiving.

D.

Neither the subject nor the researcher knows which treatment the subject is receiving.

Why do you think it is necessary for the experiment to be double-blind?

A.

The experiment is double-blind so that the subjects receiving the medication know that they are not in the placebo group and can act accordingly.

B.

The experiment is double-blind so that the individual monitoring the subjects can better distinguish the effects of the medication from the effects of the placebo.

C.

The experiment is double-blind to ensure that any observed effects of the treatment is not due to some characteristic of a single experimental unit.

D.

The experiment is double-blind so that the subjects receiving the medication do not behave differently and so the individual monitoring the subjects does not treat those receiving medication differently from those receiving a placebo.

(c) What does it mean for the experiment to be randomized?

A.

It means that the subjects are randomly selected from all of the people in the area of the study.

B.

It means that the subjects are randomly assigned to take either the topiramate or the placebo.

C.

It means that the different dosage levels of the medication are randomly assigned to individuals that are not taking the placebo.

D.

It means that the different dosage levels of the placebo are randomly assigned to individuals that are not taking the medication.