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Modern Fatherhood

Does birth order mould personality?

written by Hugh Wilson 19th January 2020
birth order

Are older siblings more responsible and younger ones funnier? Science says…maybe.

You might think it’s down to the way you parent, the time you spend with your children and their early life experiences. But science now seems to suggest that, to some extent at least, your child’s personality is down to their position in the family.

There’s long been anecdotal evidence to support the theory that older siblings are more responsible, younger ones more carefree, and so on.

 

Order that shapes personality


But research is beginning to suggest that what might have once been dismissed as an old wives’ tale contains at least a small grain of truth. Birth order might help shape personality, to a degree.

For instance, a YouGov poll of siblings found that older siblings really do feel a greater burden of responsibility. The research revealed that more first borns (54%) say they are more responsible than their siblings, while fewer last borns (31%) feel the same way.

More first-borns also thought they were the most organised compared to last-born siblings (54% to 43%), more successful (38% to 24%) and more family-oriented (32% to 28%).

By contrast, more last born siblings feel they are the funniest child compared to first borns (46% to 36%), more easy going (47% to 42%) and more relaxed (42% to 39%).

Many of these differences are small, but it is significant that they mirror accepted wisdom on the difference between first and last-born children. Oldest siblings are more serious and responsible, younger ones more adventurous and carefree.

 

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The look that says it all. 👀 . . . . . #dad #dadlife #siblings #betrayal #newbornbaby #fatherhood #daddilife

A post shared by DaddiLife (@daddilife) on Mar 25, 2019 at 11:36pm PDT

The science of birth order


So what’s going on? In the 1990s psychologist Frank J. Sulloway looked at birth order among celebrated people, and found that “thinkers and revolutionaries” – people like Charles Darwin, Karl Marx and Mahatma Gandhi – were often last borns. On the other hand, leaders like Joseph Stalin and Benito Mussolini were first borns.

Could it be that driven, conservative first borns were more likely to become leaders, while adventurous, creative last borns were more likely to rage against the status quo?

Sulloway’s theory was that first-borns (and only children), having had a period of undivided attention from their parents, were more likely to identify with their world view, retain faith in the way things are, and chase success in a bid to impress them.

By contrast, middle- and last-born children were never the sole focus of parental love, so feel less sure that the status quo is all it’s cracked up to be.

It’s an enticing theory, but the science to support it is mixed at best.

 

Maybe older siblings are just…older


dad, daddy, daddilifeforce, things to do with the kids

Older studies tended to back up Sulloway’s theory. A 1980 study of college students found that oldest children had higher egos than their siblings, and were less anxious.

But the theory – and some of the studies that have been used to support it – have been questioned. The studies tended to question siblings at only one point in their lives. Maybe older siblings were more successful (with bigger egos as a result and less anxiety about their status) simply because they were further down the path of life. These traits weren’t older sibling traits, they were simply traits of being older.

 

But there might be something in it…


Later, better designed and larger studies have produced mixed results. A 2015 study of 377,000 high school students by researchers at the University of Illinois in the US, did find that older siblings tended to be more conscientious and willing to lead.

But the differences were very small, leading the researchers to conclude that the importance of birth order might have been exaggerated, even if there is an ounce of truth in it.

“It is quite possible that the position in the sibling sequence shapes the personality – but not in every family in the same way,” Frank Spinath, a psychologist at Saarland University in Germany, told Scientific American. “In other words, there may be an influence but not a systematic one. Nevertheless, other influences weigh more heavily when it comes to the differences in character of siblings.”

But intriguingly, the Illinois study also found, to the chagrin of younger siblings everywhere (like me) that older brothers and sisters tend to have slightly higher IQs, and finish college with better qualifications.

It could be that parental attention does have an influence here. First borns benefit from the full focus of parental time during those important early years of brain development, while siblings that come later only receive a share of that attention.

Tests show that there isn’t a biological difference between the brains of first- and later-borns, so the contrasting IQ scores must be down to nurture rather than nature.

 

Birth order – a small part to play


dad case study, pre-birth

So how much does birth order mould personality? Add the YouGov poll to the picture and it seems that many older children are slightly more organised, responsible and driven, while some younger ones are more creative and carefree. It may also be true that having undivided attention during their early years gives older children an educational advantage that manifests itself in more success and bigger egos later in life. Perhaps that success leads older siblings to want to preserve the status quo – after all, it has dealt them a good hand.

But again, the differences are very slight. Birth order has some part to play, but don’t count your youngest out from being Prime Minister just yet: he might just take a while to get there.

 

birth order, personality, siblings

Does birth order mould personality? was last modified: January 26th, 2020 by Hugh Wilson

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1 comment

Tyler Boyden 19th January 2020 at 10:14 pm

Great read 👍 as a middle child I believe that it’s more nurture than nature since we didn’t have a father figure until my older sister was grown 😊 I believe I’m the most responsible and willing to do things for the world compared to my other 3 siblings 💪 you have to give them to motivation to do things in life because not everyone is born with that drive 👊 thanks for sharing hope your weekend is going great 🙏

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