In the pursuit of objectivity, quantitative-statistically oriented academic science has developed a set of widely used, specialized methodological approaches. They are often considered necessary and sufficient conditions for scientific validity, which is not entirely accurate. These methods include blinding and randomization.

There are three levels to distinguish in a blind experiment: single-blind (the test subjects do not know the identity of the test sample), double-blind (test subjects and experimenters do not know the identity of the test sample), and triple-blind (test subjects, experimenters, and data evaluators do not know the identity of the test sample).

In randomization, all important assignments (for example, those involving test subjects and comparison objects, test subjects and experimenters, order sequences etc.) are made according to chance principles.