A Participant in an Experiment Is Told That a Particular

Multiple Choice

A participant in an experiment is told that a particular pill should improve her performance on a cognitive task.The participant is then given the pill,and she performs better than usual on the task.In actuality,the pill did not contain any ingredients that would affect her performance on the task.The participant's improved performance is most likely due to ____.

A) the double-blind design
B) random variables
C) the placebo effect
D) confirmation bias