Dr. Chang is designing an experiment on obedience to authority. She will set up a learning laboratory and have participants deliver loud blasts of sound as punishment for incorrect answers (given by a confederate of the researcher). How can Dr. Chang increase the likelihood of the participants' obedience

She can make sure the participants know that she has a Ph.D. from a prestigious university                    

Explanation:

Obedience: In psychology, the term "obedience" is described as one of the different forms of social influence related to human behavior in which an individual tends to possess orders or instructions from any of the authority figures, for example, elder adult, teacher, or parents. Generally, it is being distinguished from "compliance"  and "conformity".

In the question above, Dr Chang can increase the likelihood of the participants' obedience by making sure that the participants' know that she has a "PhD from a prestigious university" because an individual generally listens or obedient towards his or her authority figure

answer; the president uses mass media to gain support for policies;