In a double-blind experiment, ________.
A. participants are randomly assigned to a control or experimental group
B. the participants are unaware of whether they are in the experimental or control groups because of the use of placebos
C. the researchers are unaware of which participants are in the experimental and control groups
D. All of the above are true.
Answer:D
In a double-blind experiment, ________.
A. participants are randomly assigned to a control or experimental group B. the participants are unaware of whether they are in the experimental or control groups because of the use of placebos C. the researchers are unaware of which participants are in the experimental and control groups D. All of the above are true.