Question

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

Answer 1

.Neither the subjects nor the experimenter know who is in the treatment group is true in a double-blind experiment.

Answer 2

Ans. Option (D).

A double-blind experiment can be defined as a scientific experiment, in which test information is masked from both experimenter and subjects or test group, until the result is obtained.

It is performed to get more accurate outcomes that can be otherwise influenced be observer bias or placebo effect.

Thus, the correct answer is option (D).