Question

In the double-blind procedure, both the participants and the research staff _____ about whether the research participants have received the treatment or a placebo.

Answer 1

Both the participants and the research staff are unaware.

Step-by-step explanation:

In a double-blind experiment, none of the people involved in the research are aware about which group has received the treatment. This is done in order to avoid biases from the participants due to the placebo effect, and to prevent the researchers from providing accidental cues about the effects of the treatment.