Home » Lessons From The Longest Study On Human Development: Helen Pearson (Transcript)

Lessons From The Longest Study On Human Development: Helen Pearson (Transcript)

Full text of science journalist Helen Pearson’s talk: Lessons From The Longest Study On Human Development at TED conference.

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Helen Pearson – Journalist

Today I want to confess something to you, but first of all I’m going to ask you a couple of questions.

How many people here have children? And how many of you are confident that you know how to bring up your children in exactly the right way?

OK, I don’t see too many hands going up on that second one, and that’s my confession, too. I’ve got three boys; they’re three, nine and 12. And like you, and like most parents, the honest truth is I have pretty much no idea what I’m doing.

I know I want them to be happy and healthy in their lives, but I don’t really know what I’m supposed to do to make sure they are happy and healthy. I mean there’re so many books out there offering all kinds of conflicting advice, it can be really overwhelming.

So I’ve spent most of their lives just making it up as I go along.

However, something changed me a few years ago, when I came across a little secret that we have in Britain. It’s helped me become more confident about how I bring up my own children, and it’s revealed a lot about how we as a society can help all children.

I want to share that secret with you today.

For the last 70 years, scientists in Britain have been following thousands and thousands of children through their lives as part of an incredible scientific study. There’s nothing quite like it anywhere else in the world.

Collecting information on thousands of children is a really powerful thing to do, because it means we can compare the ones who say, do well at school or end up healthy or happy or wealthy as adults, and the ones who struggle much more, and then we can sift through all the information we’ve collected and try to work out why their lives turned out different.

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This British study — it’s actually a kind of crazy story. So it all starts back in 1946, just a few months after the end of the war, when scientists wanted to know what it was like for a woman to have a baby at the time. They carried out this huge survey of mothers and ended up recording the birth of nearly every baby born in England, Scotland and Wales in one week. That was nearly 14,000 babies.

The questions they asked these women back then are very different than the ones we might ask today. They sound really old-fashioned now. They asked them things like, “During pregnancy, did you get your full extra ration of a pint of milk a day?”

“How much did you spend on smocks, corsets, nightdresses, knickers and brassieres?”

And this is my favorite one:

“Who looked after your husband while you were in bed with this baby?”

Now, this wartime study actually ended up being so successful that scientists did it again. They recorded the births of thousands of babies born in 1958 and thousands more in 1970. They did it again in the early 1990s, and again at the turn of the millennium.

Altogether, more than 70,000 children have been involved in these studies across those five generations. They’re called the British birth cohorts, and scientists have gone back and recorded more information on all of these people every few years ever since.

The amount of information that’s now been collected on these people is just completely mind-boggling. It includes thousands of paper questionnaires and terabytes’ worth of computer data.

Scientists have also built up a huge bank of tissue samples, which includes locks of hair, nail clippings, baby teeth and DNA. They’ve even collected 9,000 placentas from some of the births, which are now pickled in plastic buckets in a secure storage warehouse.

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This whole project has become unique — so, no other country in the world is tracking generations of children in quite this detail. These are some of the best-studied people on the planet, and the data has become incredibly valuable for scientists, generating well over 6,000 academic papers and books.

But today I want to focus on just one finding — perhaps the most important discovery to come from this remarkable study. And it’s also the one that spoke to me personally, because it’s about how to use science to do the best for our children.

So, let’s get the bad news out of the way first. Perhaps the biggest message from this remarkable study is this: don’t be born into poverty or into disadvantage, because if you are, you’re far more likely to walk a difficult path in life.

Many children in this study were born into poor families or into working-class families that had cramped homes or other problems, and it’s clear now that those disadvantaged children have been more likely to struggle on almost every score. They’ve been more likely to do worse at school, to land up with worse jobs and to earn less money.

Now, maybe that sounds really obvious, but some of the results have been really surprising, so children who had a tough start in life are also more likely to end up unhealthy as adults. They’re more likely to be overweight, to have high blood pressure, and then decades down the line, more likely to have a failing memory, poor health and even to die earlier.

Now, I talked about what happens later, but some of these differences emerge at a really shockingly early age. In one study, children who were growing up in poverty were almost a year behind the richer children on educational tests, and that was by the age of just three.

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These types of differences have been found again and again across the generations. It means that our early circumstances have a profound influence on the way that the rest of our lives play out. And working out why that is is one of the most difficult questions that we face today.

So there we have it. The first lesson for successful life, everyone, is this: choose your parents very carefully. Don’t be born into a poor family or into a struggling family.

Now, I’m sure you can see the small problem here. We can’t choose our parents or how much they earn, but this British study has also struck a real note of optimism by showing that not everyone who has a disadvantaged start ends up in difficult circumstances.

As you know, many people have a tough start in life, but they end up doing very well on some measure nevertheless, and this study starts to explain how.

So the second lesson is this: parents really matter. In this study, children who had engaged, interested parents, ones who had ambition for their future, were more likely to escape from a difficult start. It seems that parents and what they do are really, really important, especially in the first few years of life.

Let me give you an example of that. In one study, scientists looked at about 17,000 children who were born in 1970. They sifted all the mountains of data that they had collected to try to work out what allowed the children who’d had a difficult start in life to go on and do well at school nevertheless. In other words, which ones beat the odds.

The data showed that what mattered more than anything else was parents. Having engaged, interested parents in those first few years of life was strongly linked to children going on to do well at school later on.

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