Question

Please Help Me!! Will Medal!!

In a double-blind experiment, which of the following is true?

A. The subjects are not told the purpose of the experiment.
B. The experiments are conducted in a specially darkened and soundproof room to eliminate the influence of chance environmental variables.
C. The experimenter does not know which subjects are in the treatment group.
D. Neither the subjects nor the experimenter know who is in the treatment group.
E. Each experimental subject is assigned to exactly two blocks.

Answer 1

option B is hilarious lmao

Answer 2

double blind does not mean subject need to close their eyes during the experiment

Answer 3

Haha yeah it is. And yes I understand

Answer 4

answer is D

Answer 5

Thank you:D