Who was considered the smart one in your family growing up? It's a question that often sparks debate between siblings.
The oldest may claim responsibility made them wiser, while the youngest insists they benefited from learning from everyone else's mistakes. As it turns out, scientists have spent decades exploring whether birth order really makes a difference.
Several major studies suggest that the order in which children are born may have a small influence on both intelligence and personality. Among them is research from the University of Oslo, where scientists analyzed data from approximately 240,000 Norwegian men to examine the connection, reports Elmundo.
A small advantage for first-borns
The study found that first-born children scored slightly higher on average in intelligence tests than their younger siblings. The difference was relatively small, but consistent enough to attract scientific attention.
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Researchers believe the explanation is not biological. Instead, family dynamics may play a key role. First-born children often receive their parents' full attention during their earliest years and frequently take on greater responsibility as younger siblings arrive.
More than intelligence
Another large study from the University of Illinois, involving more than 377,000 American students, focused on personality rather than IQ.
Researchers found that sibling roles often develop in different ways:
- First-born children are more likely to take responsibility.
- Middle children often become more independent.
- Youngest siblings are frequently described as spontaneous and adventurous.
Many factors matter
Experts emphasize that birth order is only one part of a much larger picture. Parenting style, family circumstances, age gaps between siblings, and social influences can all shape personality and cognitive development.
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As a result, there is no guarantee that the oldest child will become the family's genius or that the youngest will grow up to be the rebel. The research simply suggests that our position within the family may leave subtle marks that follow us throughout life.
Sources: Elmundo
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