Are You Serious? Outgoing? It's Not Because Of Birth Order
A new psychological study seems to settle the debate on whether birth order determines personality and intelligence.By Ryan Biek | October 20, 2015
Does being an older brother or a younger sister make you smarter or more outgoing? A new study says the answer is no.
The idea that birth order affects intelligence and personality has been debated for roughly a century and gained steam in the '90s. The Family Niche Theory says older siblings are born physically superior and are more likely to become dominant. Later-born children supposedly have to find ways to distinguish themselves, and therefore become more extroverted.
But support for the theory has been mixed, so researchers at two German universities analyzed a massive database of more than 20,000 German, British and American adults to try to settle the debate.