Reciprocity:

if a person A helps (or harms) person B, then person B will help(or harm) person A

Transitivity:

People generally share their friends’ opinions of other people

Outgroup homogeneity effect:

the tendency to view outgroup members as less varied than ingroup members. (people from different racial groups)

Social identity theory:

the idea that ingroups consist of individuals who perceive themselves to be members of the same social category and experience pride through their group membership.

Risky-shift effect:

Groups often make riskier decisions than individuals.

Group polarization

the process by which initial attitudes of groups become more extreme over time

Groupthink:

the tendency of a group to make a bad decision as a result of preserving the group and maintaining its cohesiveness; especially likely when the group is under intense pressure, is facing external threats, and is biased in a particular direction.

Social facilitation:

the idea that the presence of others generally enhances performance(Zajonc’s model predicts that social facilitation can enhance or impair performance.)

Social loafing

the tendency for people to work less hard in a group than when working alone.

Conformity:

the altering of one’s behaviors and opinions to match those of other people or to match other people’s expectations.

Normative influence:

the tendency for people to conform to fit in with the group

Social Norms

expected standards of conduct which influence behavior.

Obedience:

when a person follows the orders of a person of authority

Aggression:

any behavior that involves the intention to harm another.

Culture of honor:

belief system in which men are primed to protect their reputation through physical aggression.

Altruism:

providing help when it is needed, without any apparent reward for doing so.

Bystander intervention effect:

the failure to offer help by those who observe someone in need when other people are present. (Diffusion of responsibility, fear of making social blunders, less likely to help when anonymous, weighing the costs vs benefits of helping)

Elaboration likelihood model:

the idea that persuasive messages lead to attitude changes in either of two ways: via the central route or via the peripheral route.

Persuasion

the active and conscious effort to change an attitude through the transmission of a message. (factors that affect: The Source(who says it), the content(what it says), receiver(who takes the message)