Research participants drank either caffeinated or decaffeinated beverages in a study of the effects of caffeine on anxiety levels.Those who received the caffeinated drinks were assigned to the ________ group.
A) survey
B) experimental
C) correlational
D) control

Question

Quizplus · Accepted Answer

Participants who received caffeinated drinks were given the treatment being studied (caffeine) and were therefore part of the experimental group. The control group would have received a placebo or no treatment to serve as a comparison to the effects of the caffeine. The survey and correlational designs are not applicable in this scenario as they do not involve experimental manipulation of variables.

Research Participants Drank Either Caffeinated or Decaffeinated Beverages in a Study