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Psychology

Herd Mentality

Quick fact

In experiments, when one person starts looking up at nothing, others will soon join them, even when there's nothing to see – demonstrating the power of herd mentality.

Why this is interesting

Have you ever bought a product because everyone else was buying it, even though you weren't sure you needed it? That's herd mentality at work – and it can influence everything from stock market crashes to viral internet challenges.