Birth order, according to conventional wisdom, molds personality: Firstborn children, secure with their place in the family and expected to be the mature ones, grow up to be intellectual, responsible and conformist.

Who explained personality in relation to birth order?

Half a century later, Alfred Adler, the second of six children, extended the psychology of birth order to personality traits (2).

What means birth order?

Birth order, defined as an individuals rank by age among siblings, has long been of interest to psychologists as well as lay-people. Much of the fascination has focused on the possible role of birth order in shaping personality and behavior.