1. group: a collection of at least two people who are doing or being something together
2. deindividuation: the loss of self-awareness and of individual accountability in a group
3. evaluation apprehension: concern about how others are judging you and/or your performance
4. dominant response: the most common reaction to a given situation
5. social facilitation theory: proposition that the presence of others increases the dominant response
tendency
6. narcissist: individual who regards himself as better than others and are constantly trying to win the admiration
of others
7. social loafing (free rider problem): the finding that people reduce effort when working in a group,
compared to when working alone
8. bad apple effect: the idea that one social loafer can cause other people to loaf as well
9. altruistic punishment: the finding that people will sometimes sacrifice their own gain for the betterment
of all, by punishing people who cheat the system