A Hawthorne Effect Occurs When ______

Multiple Choice

A Hawthorne effect occurs when ______.

A) members of the control group change because they feel disadvantaged compared with the treatment group.
B) members of the treatment group change due to positive expectations of the experimental staff.
C) members of the treatment group change because their participation in the study makes them feel special.
D) members of the control group are influenced by the experience of testing at baseline.