Final answer:
Groupthink is a situation in which all group members agree with each other, leading to a lack of diverse opinions and potentially flawed decisions. It includes several symptoms like the illusion of invulnerability, self-censorship, and an illusion of unanimity, affecting critical evaluation of alternative options or ideas.
Step-by-step explanation:
During the idea-generation meeting, when all the group members agree with each other's ideas, a phenomenon known as groupthink may have occurred. This is when group members modify their opinions to align with a perceived group consensus, sometimes resulting in a lack of diverse opinions and potentially flawed decisions. It's important to differentiate between general agreement and specific agreement, as consensus on the broad objective does not necessarily translate to unanimity on the finer details of implementation.
Key features of groupthink include the illusion of invulnerability, collective rationalization, belief in inherent morality, stereotyped views of out-groups, direct pressure on dissenters, self-censorship, illusions of unanimity, and self-appointed mindguards. These elements combined can lead to poor decision-making and hinder the group's ability to critically evaluate alternative options or ideas.