A. are conducted in both field and laboratory setting
B. involve the risk that people may modify their behavior
C. must involve control groups of some kind
D. all of the above
Correct Answer: all of the above ✔
Last Updated: June 26, 2019
A. are conducted in both field and laboratory setting
B. involve the risk that people may modify their behavior
C. must involve control groups of some kind
D. all of the above
Correct Answer: all of the above ✔
Last Updated: June 26, 2019