Baskett 's study involving 278 participants in 1985 concluded that society places stereotypes on
the way they believe birth order affects an individual's personality.
Birth order effects may diminish over time and disappear by adulthood (Ernst & Angst, 1983).
Kimberly J. Saudino, PhD, a psychology professor at Boston University,
"It could be a response to a society that values individuality, or it emphasizes children's individual
place in the family," says Saudino, who suspects these results might disappear if studying collectivist cultures.
Often Parental influences may shape the way a child will act, for example, first borns acting as
leaders towards younger siblings. But this doesn't necessarily connect to Birth order.