According to Janis,what is the most important behavioural symptom of groupthink?

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According to Janis, the most important behavioral symptom of groupthink is a tendency toward self-censorship, which means that individuals in the group avoid expressing dissenting opinions or conflicting information. This behavior can lead to a false consensus among the group, where everyone appears to be in agreement, but in reality, important information or alternative perspectives are being ignored. The other options listed are not the most important behavioral symptom of groupthink, although they may also be present.

According to Janis,what Is the Most Important Behavioural Symptom of Groupthink