When the researcher doesn't know whether a participant in an experiment is being exposed to the treatment,the experiment is described as ______.
A) controlled
B) blind
C) double blind
D) concealed
E) independent

Question

Quizplus · Accepted Answer

The term "double blind" refers to an experiment in which neither the participants nor the researchers know which participants are receiving the treatment. This is done to prevent bias from influencing the results of the experiment.

When the Researcher Doesn't Know Whether a Participant in an Experiment