What usgs stand for and what do they do? The United States Geological Survey/service were and are the cartographers that converted early maps into the GPS location system known today. Edit
Medical Definition of EGOCENTRIC. 1. : limited in outlook or concern to one's own activities or needs.
A child is egocentric concerning their world, as that is how they communicate. If they are hungry they demand food, if they are soiled they want you to change them. They know at this stage of development that everything revolves around satisfying their own needs. This behavior is not at all convoluted as there is no other way of thinking that a child has but to satisfy those basic needs.