Answer:
Self-fulfilling prophecy
Explanation:
A self-fulfilling prophecy is an account for holding future manifestation. Many psychologists work on this concept and agree that our beliefs and expectation have strong evidence impact on future outcomes. When we know that our expectation is wrong or manifest by us even then the individual not aware of that and holds that expectation.
The placebo effect is a famous example of a self-fulfilling prophecy. In this experiment, the participants improved their condition they are providing a meaningful treatment.
In sociology, this term was defined by Robert Merton. Merton said that sometimes our belief that brings consequences caused the reality match with the belief.