A. they are assigned to experimental and control group from a sample which is representative of the larger population
B. they each have an equal chance of being assigned to either the experimental or control group
C. they are assigned to experimental and control group so that the group differ on some critical variable before the experiment begins
D. neither the experimenter nor the subject knows whether the subject is in the experimental or control group
Correct Answer: they each have an equal chance of being assigned to either the experimental or control group ✔
Last Updated: May 03, 2024