In my family I am the middle child. How about you?
Birth order
Birth order refers to the order a child is born in their family; first-born and second-born are examples. Birth order is often believed to have a profound and lasting effect on psychological development. This assertion has been repeatedly challenged. Recent research has consistently found that earlier born children score slightly higher on average on measures of intelligence, but has found zero, or almost zero, robust effect of birth order on personality. Nevertheless, the notion that birth-order significantly influences personality continues to have
Children begin to ask identity questions at an early age. Who am I? Who is my family? Where do I belong? Why does my family celebrate some holidays and not others? These are all standard questions children ask to determine how they fit into their world. 
Erik Erikson (1902–1994) became one of the earliest psychologists to take an explicit interest in problem of child identity. The child identity is a complex socio-cultural phenomenon, which includes a variety of representations of a child about themselves, about the