self-fulfilling prophecy
Summary
A self-fulfilling prophecy is a belief or expectation, often false at first, that changes how people behave so that the expectation comes true. The key test point is that the belief produces the outcome through behavior, as when teacher expectations raise or lower student performance.
Detail
Meaning: A self-fulfilling prophecy occurs when someone's expectation about a person, group, or situation shapes their behavior, and that behavior leads the target to act in ways that confirm the original expectation. Robert Merton described it as a false definition of a situation that evokes behavior making the false idea come true. The cycle runs: expectation → different treatment → target responds to that treatment → the result looks like proof the expectation was right.
On the MCAT: Passages often describe teacher expectations (the Rosenthal and Jacobson "Pygmalion in the classroom" study, in which students randomly labeled as likely to bloom showed larger gains), labeling of deviance, or a rumor about a bank that triggers a run on it. A typical question asks you to identify the mechanism: a teacher gives more attention and praise to students believed to be gifted, and their performance rises. It connects to labeling theory, stereotype threat, and the Pygmalion (Rosenthal) effect.
Common confusion: Students mix it up with confirmation bias or with an accurate prediction. In a self-fulfilling prophecy the belief actually changes real outcomes through behavior. In confirmation bias the observer only notices or seeks supporting evidence, and reality is unchanged. A prediction that is simply correct from the start, without the belief altering behavior, is not a self-fulfilling prophecy.
Sources
- Sociology (Macionis)
- Introduction to Sociology (Giddens et al.)
Written for the MCAT and checked before it was published. For study reference only. Spotted an error? Let us know.