As Outlined in the Textbook,researchers Studied the Effectiveness of Audiotapes

Multiple Choice

As outlined in the textbook,researchers studied the effectiveness of audiotapes that contained subliminal messages.The researchers cleverly anticipated the placebo effect by adding another independent variable to the experiment.How was this achieved?

A) Participants listened to tapes that were mismarked.
B) Participants were paid to show the desired behaviour.
C) Participants were told that the tapes would be ineffective.
D) Participants heard messages that were clearly audible.