In Piaget's terminology, inability to consider another person's point of view; a characteristic of preoperational thought. (199)

the inability to perceive physical reality from the perspective of another person. (119)

the failure to realize that one's perspective is not shared by others. In its simplest sense, the inability to take another's point of view. See also personal fable.

the personality trait that causes one to attempt to get personal recognition for oneself (especially by unacceptable means).

attempting to get personal recognition for yourself (especially by unacceptable means)

In psychology, egocentrism is the characteristic of regarding oneself and one's own opinions or interests as most important. The term derives from the Greek egô, meaning "I." An egocentric person has no theory of mind, cannot "put himself in other people's shoes," and believes everyone sees what he sees (or that what he sees in some way exceeds what others see.)