<P> 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 . </P>
<P> 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 . </P>
in experiments the double-blind technique is used to avoid
in experiments the double-blind technique is used to avoid
subjective , unrecognized biases carried by an experiment 's subjects ( usually human ) and conductors
subjective , unrecognized biases carried by an experiment 's subjects ( usually human ) and conductors