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Groupthink

Definition

A psychological phenomenon in which a group of individuals prioritizes consensus and harmony over critical evaluation of alternatives, leading to poor decision-making. In multi-agent systems, it occurs when agents influence each other rather than making independent judgments.

Risk in Multi-Agent Consensus

  • If agents have feedback loops between them
  • Earlier agents' conclusions influence later agents
  • The group converges on the first plausible answer rather than truth
  • Results become correlated, defeating the purpose of voting

Prevention

  • Agents must run like a blind experiment — no communication between them
  • Same input provided independently to each agent
  • No knowledge of what other agents concluded
  • Results aggregated only after all agents have responded

The "Blind Experiment" Principle

  • Agents should not know they're part of a consensus
  • Each agent should independently evaluate the same input
  • Only the aggregator knows the full set of responses
  • This maximizes diversity and minimizes correlation