double-blind procedure
double-blind experiment
double-blind study

So now you create a scientific double-blind study, and then we'll know.

He plans then to conduct a double-blind study on a larger group.

Researchers are in the final phase of a double-blind study.

Only two double-blind studies were identified, and both of these produced negative results.

But it is designed to help only a particular type of lower back pain, and results are not yet available from controlled, double-blind studies.

The process of double-blind studies is indigenous to modern Western medicine.

See, the problem here, I want to see a double-blind study.

But of course nobody's doing double-blind studies with meat eaters.

A double-blind study with only objective measures is less likely to be biased to support a given conclusion.

The published data on this approach are sparse, with the only double-blind study reporting negative results.