What is the procedure where neither the subject nor the experimenter knows which group is receiving which treatment?
A) double-blind procedure
B) single-blind procedure
C) random selection
D) random assignment

Question

Quizplus · Accepted Answer

In a double-blind procedure, neither the subject nor the experimenter knows which group is receiving which treatment. This helps to eliminate any potential bias in the study and increase the validity of the results. Therefore, this is the best choice. Single-blind procedure (B) only involves the subjects not knowing which group they are in and random selection (C) and random assignment (D) are different procedures altogether, not related to blinding.

What Is the Procedure Where Neither the Subject nor the Experimenter