Social Proof: Everyone Is Doing It

Canned Laughter

TV shows use fake laughter tracks. Everyone hates them. But studies show that people laugh longer and more often when they hear the track. It signals: “This is funny. Others are laughing.”

The Towel Experiment

Hotels put signs in bathrooms: “Reuse towels to save the environment.” (Effectiveness: 35%). They changed the sign: “75% of guests in this hotel reuse their towels.” (Effectiveness: 44%). They changed it again: “75% of guests in this room reuse their towels.” (Effectiveness: 49%). We follow the tribe.