The tendency for people in a group to exert less effort when pooling their efforts toward attaining a common goal than when individually accountable.
The enhancement of a group's prevailing inclinations through discussion within the group.
The mode of thinking that occurs when the desire for harmony in a decision-making group overrides in a realistic appraisal of alternatives.
The enduring behaviors, ideas, attitudes, values, and traditions shared by a group of people and transmitted from one generation to the next.
The principle that frustration- the blocking of an attempt to achieve some goal- creates anger, which can generate aggression.
mere exposure effect
Because the human face is not perfectly symmetrical, the face we see in the mirror is not the one our friends see.
The tendency for any given bystander to be less likely to give aid if other bystanders are present.
mirror image perceptions
Mutual views often held by conflicting people, as when each side sees itself as ethical and peaceful and views the other side as evil and aggressive.
The theory that we explain someone's behavior by crediting either the situation or the person's disposition
Fundamental attribution error
the tendency for observers, when analyzing another's behavior, to underestimate the impact of the situation and to overestimate the impact of personal disposition.
overestimating others' noticing and evaluating our appearance, performance, and blunders.
central route persuasion
attitude change path in which interested people focus on the arguments and respond with favorable thoughts
peripheral route persuasion
attitude change path in which people are influenced by incidental cues, such as a speaker's attractiveness.
foot in the door phenomenon
the tendency for people who have first agreed to a small request to comply later with a larger request
cognitive dissonance theory
the theory that we act to reduce the discomfort we feel when two of our thoughts are inconsistent.