Answer:
The phenomenon is known as "self-fulfilling prophecy".
Explanation:
Sometimes it happened that you make any prophecy and then it comes true, thus we define self-fulfilling prophecy as a belief you hold about any future event and that comes true. There must be two people involved in self-fulfilling prophecies because you alone cannot have self-fulfilling prophecy.
The phenomenon described above is known as a Self-fulfilling prophecy.
This is a condition in sociology where an erroneous belief or prejudiced belief about someone become true based on the principle that actions beget actions.
Jane believes for example, that John (whom she is just meeting) looks like a rude person. She relates with him from that psychological point of view thus behaving rudely towards him unknowingly.
When John returns the "favor", Jane then concludes that she was right in the first place, hence a self-fulfilling prophecy.
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