When Small Signs of Change Add Up: The Psychology of Tipping Points

Things change, but the exact point at which they do is often unknown. After how many loveless nights is a relationship "officially" in trouble? After how many happy days has one's depression "officially" passed? When do recurring patterns in the climate or economy "officially" warrant a response? When is a person's identity "officially" accepted? Everyday fluctuations in oneself and the social world create ambiguities about when people will diagnose lasting, qualitative change (and therefore act). Recent research documents these tipping points of change as a psychological process, shaped by individual and situational forces. People judge tipping points asymmetrically across valence and asymmetrically across time. Here, I review discoveries and outline future directions in tipping-points research.