When both the researchers and the participants do not know who is in the experimental group and do not know who is in the control group,this type of study is known as
A) placebo controlled.
B) quasi-experimental.
C) unwise.
D) double blind.

Question

Quizplus · Accepted Answer

In a double-blind study, both the researchers and participants are unaware of who is in the experimental group and who is in the control group, which helps to minimize potential biases and ensure that the results are valid. Therefore, D is the best answer. A placebo-controlled study involves giving some participants a fake treatment to compare with the real treatment given to others, but this doesn't necessarily mean that researchers or participants are unaware of which group they are in. Quasi-experimental studies do not involve randomly assigning participants to groups, so they may not be as reliable as studies that do use randomization. "Unwise" is not a valid option.

When Both the Researchers and the Participants Do Not Know