Self-fulfilling prophecy

A self-fulfilling prophecy is a prediction that directly or indirectly causes itself to become true, by the very terms of the prophecy itself, due to positive feedback between belief and behavior. Although examples of such prophecies can be found in literature as far back as ancient Greece and ancient India, it is 20th-century sociologist Robert K. Merton who is credited with coining the expression "self-fulfilling prophecy" and formalizing its structure and consequences. In his book Social Theory and Social Structure, Merton gives as a feature of the self-fulfilling prophecy: e.g. when Roxanna falsely believes her marriage will fail, her fears of such failure actually cause the marriage to fail.

"The self-fulfilling prophecy is, in the beginning, a false definition of the situation evoking a new behaviour which makes the original false conception come 'true'. This specious validity of the self-fulfilling prophecy perpetuates a reign of error. For the prophet will cite the actual course of events as proof that he was right from the very beginning."

In other words, a prophecy declared as truth when it is actually false may sufficiently influence people, either through fear or logical confusion, so that their reactions ultimately fulfill the once-false prophecy.

History of the concept

Merton's concept of the self-fulfilling prophecy stems from the Thomas theorem, which states that "If men define situations as real, they are real in their consequences."

According to Thomas, people react not only to the situations they are in, but also, and often primarily, to the way they perceive the situations and to the meaning they assign to these perceptions. Therefore, their behavior is determined in part by their perception and the meaning they ascribe to the situations they are in, rather than by the situations themselves. Once people convince themselves that a situation really has a certain meaning, regardless of whether it actually does, they will take very real actions in consequence.

Merton took the concept a step further and applied it to recent social phenomena. In his book Social Theory and Social Structure, he conceives of a bank run at the fictional Last National Bank, over which Cartwright Millingville presides. It is a typical bank, and Millingville has run it honestly and quite properly. As a result, like all banks, it has some liquid assets (cash), but most of its assets are invested in various ventures. Then one day, a large number of customers come to the bank at once—the exact reason is never made clear. Customers, seeing so many others at the bank, begin to worry. False rumors spread that something is wrong with the bank and more customers rush to the bank to try to get some of their money out while they still can. The number of customers at the bank increases, as does their annoyance and excitement, which in turn fuels the false rumors of the bank's insolvency and upcoming bankruptcy, causing more customers to come and try to withdraw their money. At the beginning of the day—the last one for Millingville's bank—the bank was not insolvent. But the rumor of insolvency caused a sudden demand of withdrawal of too many customers, which could not be answered, causing the bank to become insolvent and declare bankruptcy. Merton concludes this example with the following analysis:

"The parable tells us that public definitions of a situation (prophecies or predictions) become an integral part of the situation and thus affect subsequent developments. This is peculiar to human affairs. It is not found in the world of nature, untouched by human hands. Predictions of the return of Halley's comet do not influence its orbit. But the rumored insolvency of Millingville's bank did affect the actual outcome. The prophecy of collapse led to its own fulfillment."

Merton concluded that the only way to break the cycle of self-fulfilling prophecy is by redefining the propositions on which its false assumptions are originally based.

In economic "expectations models" of inflation, peoples' expectations of future inflation lead them to spend more today and demand higher nominal interest rates for any savings, since they expect that prices will be rising. This demand for higher nominal interest rates and increased spending in the present, in turn, create inflationary pressure and can cause inflation even if the expectations of future inflation are unfounded. The expectations theory of inflation played a large role in Paul Volker's actions during his tenure as the Chairman of the Federal Reserve in combating the "stagflation" of the 1970s.

Philosopher Karl Popper called the self-fulfilling prophecy the Oedipus effect:

One of the ideas I had discussed in The Poverty of Historicism was the influence of a prediction upon the event predicted. I had called this the "Oedipus effect", because the oracle played a most important role in the sequence of events which led to the fulfillment of its prophecy. … For a time I thought that the existence of the Oedipus effect distinguished the social from the natural sciences. But in biology, too—even in molecular biology—expectations often play a role in bringing about what has been expected.

Applications

Examples abound in studies of cognitive dissonance theory and the related self-perception theory; people will often change their attitudes to come into line with what they profess publicly.

In the United States the concept was broadly and consistently applied in the field of public education reform, following the "War on Poverty". Theodore Brameld noted: "In simplest terms, education already projects and thereby reinforces whatever habits of personal and cultural life are considered to be acceptable and dominant." The effects of teacher attitudes, beliefs and values, affecting their expectations have been tested repeatedly.

The phenomenon of the "inevitability of war" is a self-fulfilling prophecy that has received considerable study.

The idea is similar to that discussed by the philosopher William James as The Will to Believe. But James viewed it positively, as the self-validation of a belief. Just as, in Merton's example, the belief that a bank is insolvent may help create the fact, so too on the positive side, confidence in the bank's prospects may help brighten them. A more Jamesian example: a swain, convinced that the fair maiden must love him, may prove more effective in his wooing than he would had his initial prophecy been defeatist.

There is extensive evidence of "Interpersonal Expectation Effects" where the seemingly private expectations of individuals can predict the outcome of the world around them. The mechanisms by which this occurs are also reasonably well understood: it is simply that our own expectations change our behaviour in ways we may not notice and correct. In the case "Interpersonal Expectation Effects", others pick up on non-verbal behaviour which affects their attitudes. A famous example includes a study where teachers were told arbitrarily that random students were "going to blossom". Oddly, those random students actually ended the year with significantly greater improvements.

Other specific examples discussed in psychology include:

• 'Clever Hans' effect
• Observer-expectancy effect
• Hawthorne effect
• Placebo effect
• Pygmalion effect
• Stereotype threat

Sources

• Dorothy L. Sayers, "Oedipus Simplex: Freedom and Fate in Folklore and Fiction"