Why do reserchers and scientist do double blind experements?

Question

Why do reserchers and scientist do double blind experements?

Answer 1

A double-blind experiment is when there are different treatment groups, like group A gets the real drug and group B gets the placebo, and neither the researchers nor the participants know which group they're in.  If they did know, then participants may respond differently because of psychological effects or researchers may unintentionally treat the groups differently, affecting the results.

Answer 2

to obtain all possible fruitful and

judicious outcomes and  resolutions

Answer 3

To test for the variable without the influence of the test subject or the researcher. Nobody knows what is what until the results are counted.