<P> A blind or blinded - experiment is an experiment in which information about the test is masked ( kept ) from the participant , to reduce or eliminate bias , until after a trial outcome is known . It is understood that bias may be intentional or unconscious , thus no dishonesty is implied by blinding . If both tester and subject are blinded , the trial is called a double - blind experiment . </P>
<P> A blind or blinded - experiment is an experiment in which information about the test is masked ( kept ) from the participant , to reduce or eliminate bias , until after a trial outcome is known . It is understood that bias may be intentional or unconscious , thus no dishonesty is implied by blinding . If both tester and subject are blinded , the trial is called a double - blind experiment . </P>
when is an experiment considered to be double-blind
when is an experiment considered to be double-blind
If both tester and subject are blinded
If both tester and subject are blinded