Final answer:
This situation is an example of a self-fulfilling prophecy, where the coaches' expectations influenced Leslie's performance during the tryout races.
Step-by-step explanation:
This situation is an example of a self-fulfilling prophecy. When the coaches heard that Leslie is a really good swimmer, they offered her extra tips and encouragement. During the tryout races, Leslie's performance exceeded the coaches' expectations, validating their initial belief. This demonstrates how our expectations can influence our behavior and the behavior of others