Jonathan, as a new police officer, believed that his job was to help people in the community. His partner, who is an experienced officer, told Jonathan that being a good officer involved looking for any reason to arrest and detain others. Jonathan now spends his day trying to arrest as many people as possible. Based on the findings of Zimbardo's prison study, Jonathan's change in attitude about his job illustrates the impact of

cognitive dissonance.
peripheral route persuasion.
attributions.
role playing on attitudes.