Psychology
Informational Influence
Quick fact
In a classic experiment, participants alone in a dark room reported that a stationary point of light moved—but when hearing others' estimates, their judgments converged, showing how we rely on others for information in ambiguous situations.
Why this is interesting
Ever changed your mind about a restaurant after seeing it packed with people? Why do we often trust the crowd's judgment over our own?
Read the full explanation
Understanding Informational Influence
Informational influence is the tendency to accept information from others as evidence about reality. It happens in situations where you're uncertain—maybe you're choosing a product online, deciding how to behave at a new job, or interpreting a complex news story. You look to what others are doing or saying as a clue to the correct response. This is different from normative influence, where you conform to avoid rejection. With informational influence, the goal is accuracy: you genuinely believe the group's behavior is right. It often leads to private acceptance—changing your own mind, not just your public behavior.
A deeper explanation
Informational influence works because humans are social learners. When the situation is ambiguous or the task is difficult, we assume that the majority or experts have better knowledge. This assumption is often adaptive—groups do tend to be more accurate than individuals in many domains. The mechanism relies on a heuristic: 'if many people think so, it must be true.' This is powerful in shaping attitudes, from fashion trends to political beliefs. It also explains how misinformation can spread: if many people share a false claim, others may accept it as true. Understanding this concept reveals why critical thinking and diverse sources are crucial—and why social media algorithms can amplify informational influence by making certain views appear more consensus than they are.