Final answer:
Expectation effects are stronger when more than one important person in someone's life holds the expectation for a longer time. This appears to be especially true for positive expectations.
Step-by-step explanation:
Expectation effects are stronger when more than one important person in someone's life holds the expectation for a longer time.
This appears to be especially true for positive expectations.
For example, research by Rosenthal and Jacobson found that disadvantaged students whose teachers expected them to perform well had higher grades than disadvantaged students whose teachers expected them to do poorly.