Are you the oldest sibling ? You are smarter! While the youngest are healthier and more likely to be gay …according to New Study

By Jamie Williams

Are you the oldest brother or sister ? Have you always been saying to your younger brothers or sisters that you are the smartest? Well now you have science to back you up!

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A New Study from the University of Leipzig  claims older siblings are smarter on average, while the youngest are healthier and more likely to be gay.

Older and Wiser

The research showed a small difference in intellect was found, with the oldest child being slightly more intelligent than their younger siblings, who are in turn were slightly more intelligent than their younger siblings.

They also found there were differences in how intelligent people thought they were, with first-born children being more likely to agree with statements such as “I am quick to understand things” than their younger siblings.

These people were also more likely to say they found it easier to understand abstract ideas and that they had a richer vocabulary than younger siblings.

Although it’s not clear why this might be the case, previous research suggests this might be due the eldest child’s social status in the family rather than a biological change that happens in the womb.

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It is thought that a higher social rank could be responsible for the small increase seen in intelligence .

Health and Personality

Its not all doom and gloom if you are younger though, you my not be as intelligent but younger children in families appear to be healthier than their older brothers and sisters.

The study looked at 20,000 people  from the UK, US and Germany – and concluded that personality is not affected by whether you were born first, last or in between.

The study agrees with previous ones, that looked at the relationship between birth order and incidence of Type 1 diabetes. It saw that those born second, third or later had a lower risk of becoming diabetic compared with the first born child.

Scientists think that this is caused by changes in the womb or from experiences after birth, such as delayed exposure to infections.

Sexual Orientation 

Men with more older brothers are more likely to be gay. This is known as the “older brother phenomenon” – for every extra older brother a man has the likelihood that he is attracted to men is increased by a small amount. This is thought to be because “each older male sibling changes the womb slightly. And we think the most plausible explanation has to do with the maternal immune response” according to Prof Tony Bogaert, of Brock University, Canada, one of the scientists who first observed the phenomenon, explained that this is a biological effect.

Older and Wiser,  Younger and Healthier

The Study titled ” Examining the effects of birth order on personality” states “The question of whether a person’s position among siblings has a lasting impact on that person’s life course has fascinated both the scientific community and the general public for >100 years. By combining large datasets from three national panels, we confirmed the effect that firstborns score higher on objectively measured intelligence and additionally found a similar effect on self-reported intellect. However, we found no birth-order effects on extraversion, emotional stability, agreeableness, conscientiousness, or imagination. This finding contradicts lay beliefs and prominent scientific theories alike and indicates that the development of personality is less determined by the role within the family of origin than previously thought.”

Some in the HQ have a much simpler explanation for the apparent differences in intelligence…

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What are your thoughts on the Research ? What do you think? Are you younger and more intelligent than your siblings what are your views and experiences.. please leave a comment below… and don’t forget to signup to the blog and like our FB and Follow us on Twitter to get more interesting stories and the latest offers from


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