eg if you are middle child are you any different to the first child or 3rd?
Since the 1920s, psychiatrists starting with Alfred Adler have debated the effect of birth order on personality. Generally, most theorists believe that the oldest child is usually more conservative, ambitious, and responsible. Older children and children from smaller families also ordinarily score slightly better on intelligence tests than their younger brothers and sisters.
Younger brothers and sisters often rebel against the standards set by their older siblings. Of course, they are often just as likely to try to best them. Middle children are often ignored as parents concentrate on the baby in the family. Recent studies indicate that the younger brothers in a family with many sons have a greater tendency to become homosexuals.
Of course, for every study undertaken on birth order and personality, there is probably another study that disputes its findings. Children are also influenced by the stability or lack of stability of their parents’ relationship, their economic status, and their religious upbringing (or lack thereof), their general health, and their education.
BTW, the obsessive-compulsive author of this post is a first-born child.