Animals aggress only when their goals are thwarted.
Being too hot, crowded, or not feeling well leads to aggression.
Behavior by two or more individuals that leads to mutual benefit.
A collection of people who have something in common that distinguishes them from others.
A positive or negative evaluation of another person based on their group membership.
Positive or negative behavior toward another person based on their group membership.
Behavior that benefits another without benefiting oneself.
A phenomenon that occurs when immersion in a group causes people to become less aware of their individual values.
Diffusion of Responsibility
The tendency for individuals to feel diminished by responsibility for their actions when they are surrounded by others who are acting the same way.
The process by which evolution selects for individuals who cooperate with their relatives.
Behavior that benefits another with the expectation that those benefits with be returned in the future.
Mere Exposure Effect
The tendency for liking to increase with the frequency of exposure.
An experience involving feelings of euphoria, intimacy, and intense sexual attraction.
An experience involving affection, trust, and concern for a partner's well-being.
The hypothesis that people remain in relationships only as long as they perceive a favorable ratio of costs to benefits.
The cost-benefit ratio that people believe they deserve or could attain in another relationship.
A state of affairs in which the cost-benefit ratios of two partners are roughly equal.
The ability to control another person's behavior.
A customary standard for behavior that is widely shared by members of a culture.
A phenomenon that occurs when another person's behavior provides information about what is appropriate.
Norm of Reciprocity
The unwritten rule that people should benefit those who have benefited them.
Door In The Face Technique
A strategy that uses reciprocating concessions to influence behavior.
The tendency to do what others do simply because others are doing it.
The tendency to do what powerful people tell us to do.
An enduring positive or negative evaluation of an object or event.
An enduring piece of knowledge about an object or event.
A phenomenon that occurs when a person's behavior provides information about what is good or right.
A phenomenon that occurs when a person's attitudes or beliefs are influenced by a communication from another person.
The process by which attitudes or beliefs are changed by appeals to reason.
The process by which attitudes or beliefs are changed by appeals to habit or emotion.
An unpleasant state that arises when a person recognizes the inconsistency of his or her actions, attitudes, or beliefs.
The processes by which people come to understand others.
The process by which people draw inferences about others based on their knowledge of the categories to which others belong.
An inference about the cause of a person's behavior.
The tendency to make a dispositional attribution even when a person's behavior was caused by the situation.
Actor Observer Effect
The tendency to make situational attributions for our own behaviors while making dispositional attributions for the identical behavior of others.