[Analysis] In item A, Xiao Zhang's parents' expectations for him were not realized. Item B, Teacher Li's expectation has influenced Xiao Zhang and improved his grades, so it is a self-fulfilling prophecy; C Xiaohong has expectations for his father, but has no direct influence on his father; Item D Xiao Li's expectation is aimed at himself, not at others.

This definition mainly includes: our expectations of others influence each other.