Groupthink is a psychological phenomenon where people strive for consensus within groups. Term was coined by Irving L. Janis in 1972. People often set aside personal beliefs and adopt group opinions
Theory created by Tajfel and Turner in 1970s. Minimal-group studies showed in-group favoritism despite meaningless group membership. Tajfel defined social identity concept in 1972
Groupthink occurs when group cohesion leads to irrational decision-making. Term coined by William H. Whyte Jr. in 1952. Irving Janis pioneered research and studied Bay of Pigs and Pearl Harbor
Decision-making is the cognitive process of selecting beliefs or actions among alternatives. It can be rational or irrational, based on explicit or tacit knowledge. Problem-solving leads to decision-making through analysis and evaluation
In-group favoritism is favoring members of one's own group over others. William Sumner first proposed this tendency in 1906. Cultural groups form naturally through symbolic markers
Herd is a social group of animals of same species, wild or domestic. Most commonly refers to grazing ungulates, birds use flocking. Control animals often imitate herd behavior but aren't necessarily leaders