主题：投票【整理】含3味药的中药方能穷举出来吗？废医验药=废医废药 -- alphaboy

Double-blind describes an especially stringent way of conducting an experiment which attempts to eliminate subjective, unrecognized biases carried by an experiment's subjects (usually human) and conductors. Double-blind studies were first used in 1907 by W. H. R. Rivers and H. N. Webber in the investigation of the effects of caffeine.[8]

In most cases, double-blind experiments are regarded to achieve a higher standard of scientific rigor than single-blind or non-blind experiments.

In these double-blind experiments, neither the participants nor the researchers know which participants belong to the control group, nor the test group. Only after all data have been recorded (and, in some cases, analyzed) do the researchers learn which participants were which.