Pluralistic ignoranceIn social psychology, pluralistic ignorance (also known as a collective illusion) is a phenomenon which occurs when people mistakenly believe that everyone else holds a different opinion than their own. Most people in a group may go along with a view they do not agree with, because they incorrectly think that most other people in the group agree with it. It refers to a situation in which the minority position on a given topic is wrongly perceived to be the majority position or where the majority position is wrongly perceived to be the minority position.
Herd mentalityHerd, mob, or pack mentality describes how people can be influenced by the majority. Social psychologists study the related topics of group intelligence, crowd wisdom, groupthink, and deindividuation. The idea of a "group mind" or "mob behavior" was first put forward by 19th-century social psychologists Gabriel Tarde and Gustave Le Bon. Herd behavior in human societies has also been studied by Sigmund Freud and Wilfred Trotter, whose book Instincts of the Herd in Peace and War is a classic in the field of social psychology.
Crowd psychologyCrowd psychology (also mob psychology) is a branch of social psychology that deals with the ways in which the psychology of a crowd is different from the psychology of the individual persons who are the crowd. The field of crowd psychology enquires into the behaviors and thought processes of both the individual members of the crowd and the crowd as a collective social entity. The behavior of a crowd is much influenced by deindividuation, a person's loss of responsibility, and the person's impression of the universality of behavior, both of which conditions increase in magnitude with size of the crowd.
DeindividuationDeindividuation is a concept in social psychology that is generally thought of as the loss of self-awareness in groups, although this is a matter of contention (see below). For the social psychologist, the level of analysis is the individual in the context of a social situation. As such, social psychologists emphasize the role of internal psychological processes. Other social scientists, such as sociologists, are more concerned with broad social, economic, political, and historical factors that influence events in a given society.
Bandwagon effectThe bandwagon effect is the tendency for people to adopt certain behaviors, styles, or attitudes simply because others are doing so. More specifically, it is a cognitive bias by which public opinion or behaviours can alter due to particular actions and beliefs rallying amongst the public. It is a psychological phenomenon whereby the rate of uptake of beliefs, ideas, fads and trends increases with respect to the proportion of others who have already done so.
Availability cascadeAn availability cascade is a self-reinforcing cycle that explains the development of certain kinds of collective beliefs. A novel idea or insight, usually one that seems to explain a complex process in a simple or straightforward manner, gains rapid currency in the popular discourse by its very simplicity and by its apparent insightfulness. Its rising popularity triggers a chain reaction within the social network: individuals adopt the new insight because other people within the network have adopted it, and on its face it seems plausible.
Herd behaviorHerd behavior is the behavior of individuals in a group acting collectively without centralized direction. Herd behavior occurs in animals in herds, packs, bird flocks, fish schools and so on, as well as in humans. Voting, demonstrations, riots, general strikes, sporting events, religious gatherings, everyday decision-making, judgement and opinion-forming, are all forms of human-based herd behavior. Raafat, Chater and Frith proposed an integrated approach to herding, describing two key issues, the mechanisms of transmission of thoughts or behavior between individuals and the patterns of connections between them.
Abilene paradoxThe Abilene paradox is a collective fallacy, in which a group of people collectively decide on a course of action that is counter to the preferences of most or all individuals in the group, while each individual believes it to be aligned with the preferences of most of the others. It involves a breakdown of group communication in which each member mistakenly believes that their own preferences are counter to the group's, and therefore does not raise objections, or even states support for an outcome they do not want.
Collective narcissismIn social psychology, collective narcissism (or group narcissism) is the tendency to exaggerate the positive image and importance of a group to which one belongs. The group may be defined by ideology, race, political beliefs/stance, religion, sexual orientation, social class, language, nationality, employment status, education level, cultural values, or any other ingroup. While the classic definition of narcissism focuses on the individual, collective narcissism extends this concept to similar excessively high opinions of a person's social group, and suggests that a group can function as a narcissistic entity.
Spiral of silenceThe spiral of silence theory is a political science and mass communication theory proposed by the German political scientist Elisabeth Noelle-Neumann. It states that an individual's perception of the distribution of public opinion influences that individual's willingness to express their own opinions, which in turn affects the perceptions and, ultimately, willingness of others to express their opinions. The main idea is that people influence each other's willingness to express opinions through social interaction.
