Self-fulfilling prophecy
A false expectation makes itself come true through behavior it provokes.
What it means
A belief or expectation that, though initially unfounded, causes its own fulfillment by altering behavior in ways that make the expected outcome occur. Merton's classic formulation showed how a false definition of a situation evokes new behavior that makes the originally false conception come true. The interpersonal version, behavioral confirmation, occurs when a perceiver's expectation about a target shapes how the perceiver acts, eliciting confirming behavior from the target. It operates in education, management, healthcare, and stereotyping, where labels and expectations quietly mold the labeled person's conduct. It is a powerful demonstration that beliefs are not merely passive readings of reality but forces that help construct it.
Examples
Teachers told certain randomly chosen pupils were 'late bloomers' treated them more warmly, and those pupils' measured performance rose.
A rumour that a sound bank is failing sends depositors queuing to withdraw; starved of cash, the bank fails — the false belief manufactured its own proof.
Convinced a new colleague dislikes him, he keeps his replies short and his door shut; she reads the coldness as dislike and returns it, confirming exactly what he suspected.
First described in Robert Merton (1948); Rosenthal & Jacobson (1968).