Question

In order to prevent the researcher's expectations from influencing study participants, a(an) _____ design is used

Answer 1

I believe this would be double blind.

Answer 2

Double-blind

Step-by-step explanation:

A double-blind study is a study in which neither the participants nor the experimenters know who the control group is. This is done in order to prevent the researcher's expectations from influencing the study participants. In this type of experiment, the researchers do not know who is receiving a placebo, so their bias is taken out of the equation.