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Researcher Jack Eaton's content analysis of media press releases revealed that all eight symptoms of groupthink were present during this period. The most predominant symptom of groupthink was the illusion of invulnerability as both companies underestimated potential failure due to years of profitability and success during challenging markets.
Irving Lester Janis (May 26, 1918 – November 15, 1990) was an American research psychologist at Yale University and a professor emeritus at the University of California, Berkeley most famous for his theory of "groupthink", which described the systematic errors made by groups when making collective decisions.
Groupthink, the psychological phenomenon that occurs within a group of people in which the desire for harmony or conformity in the group results in an irrational or dysfunctional decision-making outcome.
Sally Fuller and Ramon Aldag argue that group decision-making models have been operating under too narrow of a focus due to the overemphasis of the groupthink phenomenon. [2] [3] [4] In addition, according to them, group decision-making has often been framed in relative isolation, ignoring context and real-world circumstances, which is a likely consequence of testing group decision-making in ...
Groupthink can lead to lack of creativity and decisions made without critical evaluation. [35] Hogg and separately Deanne et al. stated that groupthink can occur, for example, when group members rely heavily on a charismatic figure or where members evince an "evangelical" [36] [37] belief in the organization's values. Groupthink can also occur ...
Groupthink occurs when the group members are familiar with each other and seek each other's approval, especially in stressful situations. The diffusion of responsibility contributes to groupthink as when the diffusion of responsibility is occurring within a group, each group member feels less of a responsibility to express his or her own ...
The social identity approach suggests a more general approach to group decision-making than the popular groupthink model, which is a narrow look at situations where group and other decision-making is flawed. Social identity analysis suggests that the changes which occur during collective decision-making are part of rational psychological ...
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.