A. All subjects get the experimental procedure
B. Half the subjects get the experimental procedure, half the placebo, which they receive is known only to the experimenter
C. Half the subjects get the experimental procedure, half the placebo; which they receive is not known to subjects or experimenter
D. All subjects get the control procedure
Correct Answer: Half the subjects get the experimental procedure, half the placebo; which they receive is not known to subjects or experimenter ✔
Last Updated: May 03, 2024