Psychotherapist Alfred Adler was the first to propose a theory on how birth order impacted personality. Birth order theory suggests that birth order can affect the developing personality of a child.

Psychologists often look at how birth order can affect development, behavior patterns, and personality characteristics, and there is some evidence that birth order might play a role in certain aspects ...

In 1964, Alfred Adler developed a theory on the importance of birth order on personality development. In his theory, he claims that although children may be born into the same household ...

a psychologist known for work in the area of birth order, indicates otherwise.” “Falbo found that Chinese only children fared no worse in personality or achievement than their counterparts ...

However, these characteristics don’t seem to hold up in research. Various studies have found that birth order has no bearing on a person’s predisposition. Does birth order affect personality?