A group of college students believes that herbal tea has remarkable restorative powers.To test its theory,the group makes weekly visits to a local nursing home,visiting with residents,talking with them,and serving them herbal tea.After several months many of the residents are more cheerful and healthy.What is the lurking variable in this experiment?
A) The emotional state of the residents
B) Herbal tea
C) The fact that this is a local nursing home
D) Visits of the college students
Correct Answer:
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