One's expectations about a person can eventually lead that person to behave and achieve in ways that confirm those expectations.
[1]
The Pygmalion effect is "the idea that one's expectations about a person can eventually lead that person to behave and achieve in ways that confirm those expectations"[2]
References
See also
- Expectation (math)
- Placebo effect
- Subject-expectancy effect
- Double-blind studies, [[blind experiment]