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High Traffic Noise at School, Slower Cognitive Development

High Traffic Noise at School, Slower Cognitive Development

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Daily brief research updates from the cognitive sciences

noise brain development learning

Who would have thought that traffic noise could impact cognitive development of kids? Well according to this recent piece of research it can.

Are you sure?

Well, these researchers from the Barcelona Institute for Global Health designed a pretty comprehensive study. They measure the cognitive ability of 2’680 children over 12 months on attention and working memory. They were tested four times over this 12-month period.

They attended 38 different schools and noise was measured in front of the school, in the playground, and in the classrooms.

What were the results?

The results were pretty clear. Those attending schools with higher noise levels had slower cognitive development. They were able to quantify this:

    • A 5 dB increase in outdoor noise levels resulted in working memory development that was 11.4% slower than average
    • A 5 dB increase in outdoor noise levels resulted in complex working memory development that was 23.5% slower than average. Similarly,
    • A 5 dB increase in outdoor noise levels resulted in attention capacity development that was 4.8% slower than average.

Isn’t this a result of socioeconomic factors rather than noise?

It could be that poorer kids are at schools that have more noise, and that these kids are at multiple disadvantages. However, this association was dependent on noise not location. There were also other interesting correlations. Notably that noise variation in the classroom seemed to have particularly disruptive effective and this was more indicative than the average noise level.

Similarly, a noise map was used to estimate noise levels at each child’s home, and this did not seem to impact cognitive development.

It seems that noise, particularly with variation within the classroom is most disruptive, likely because this is where critical aspects of cognitive development take place.

Obviously, this would need to be followed up with more studies in more locations but, for the moment this is pretty worrying and something else that local and education authorities need to take into account

Andy Habermacher

Andy Habermacher

Andy is author of leading brains Review, Neuroleadership, and multiple other books. He has been intensively involved in writing and research into neuroleadership and is considered one of Europe’s leading experts. He is also a well-known public speaker speaking on the brain and human behaviour.

Andy is also a masters athlete (middle distance running) and competes regularly at international competitions (and holds a few national records in his age category).

twitter / LinkedIn

Reference

Maria Foraster, Mikel Esnaola, Mónica López-Vicente, Ioar Rivas, Mar Álvarez-Pedrerol, Cecilia Persavento, Nuria Sebastian-Galles, Jesus Pujol, Payam Dadvand, Jordi Sunyer. 
Exposure to road traffic noise and cognitive development in schoolchildren in Barcelona, Spain: A population-based cohort study
PLOS Medicine, 2022; 19 (6): e1004001
DOI: 10.1371/journal.pmed.1004001

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How Gratitude between Co-Workers Lowers Stress and Increases Performance

How Gratitude between Co-Workers Lowers Stress and Increases Performance

Quick Hits
Daily brief research updates from the cognitive sciences

business neuroleadership stress brain

Gratitude is a nice thing to have, I think we all agree on that. But when it comes to the workplace some may see it is just being nice, and not being focused enough on the hard realities of work. Or worse see it as turning the workplace soft! But a study just out, shows how gratitude can have multiple positive impacts – also on performance.

How did they measure this?

The researchers at the University of California put 200 participants through a high-stress competitive task in teams of two. This involved a task that was basically impossible to complete: coming up with a proposal in 6 minutes for a product to use on campus and followed by a six-minute presentation to a panel of judges. As you can see this is designed to optimally raise stress within very short- time frames to complete a task and then face a panel of judges. This was also combined with a financial reward of $200 dollars to give financial incentives meaning something was also at stake. Increasing rewards has also been shown to increase stress.

During the task participants wore electrodes on their heart and neck to measure heart signals and also wore a blood pressure cuff to monitor blood pressure.

Some of the teams were randomly assigned to express gratitude whereby one team member would express gratitude or thanks to the other team member prior to completing the task.

What were the results?

In both parts of the experiment, the design phase and the pitch phase, a short gratitude intervention, of one team member expressing gratitude to the other, improved cardiovascular responses. This pushed the response pattern from a negative stress response to what is known as a challenge response. This is when stress optimises performance rather than restricts performance.

This shows that gratitude lowers stress and improves performance in either a creative collaborative task or a high stakes performance tasks such as presenting to this panel of judges.

The researchers note that this gratitude intervention increases concentration, gives more confidence, and allows more people to reach peak performance. All while avoiding the negative effects of stress. This not to mention playing a fundamental role in strengthening relationships.

If that ain’t a good thing, I don’t know what is

Andy Habermacher

Andy Habermacher

Andy is author of leading brains Review, Neuroleadership, and multiple other books. He has been intensively involved in writing and research into neuroleadership and is considered one of Europe’s leading experts. He is also a well-known public speaker speaking on the brain and human behaviour.

Andy is also a masters athlete (middle distance running) and competes regularly at international competitions (and holds a few national records in his age category).

twitter / LinkedIn

Reference

Yumeng Gu, Joseph M. Ocampo, Sara B. Algoe & Christopher Oveis.
Gratitude Expressions Improve Teammates’ Cardiovascular Stress Responses
Journal of Experimental Psychology: General (In press), 2022

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How Poverty Messes Up Babies’ Brains

How Poverty Messes Up Babies’ Brains

The Dramatic Impact of Poverty in Newborns Brains

​Reading time: about 5 minutes

baby brain

So, does being poor impact your brain, or are people with decreased cognitive ability poor?

Some people may have strong opinions on the above question. Probably broadly along political partisan lines. But the best place to answer this question is with research and science and the answer is coming firmly down on the side of, poverty disrupts you brain. If I were being dramatic, I might say it “wreaks havoc” “destroys” or some other emotional descriptions. They might actually be very good descriptions.

But how?

First, let’s review some recent research out which is really interesting because it scanned newborn babies’ brains while they were sleeping. This is really important because it showed that this life disadvantage is there right from day one. That is very worrying.

The researchers at Washington University School of Medicine analysed a sample of 399 mothers and their babies. 280 of these were at a social disadvantage - scientific language for being poor. And these newborns showed significant differences to their brains to babies born to mothers in better social conditions.

The scans showed

  • Less cortical gay matter  -  cortical gray matter is the outer layer of the brain considered our higher functional area of the brain (but involved in a lot including sensory processing). The gray matter is the area that houses your neurons, brain cells.
  • Less sub-cortical gray matter  –  subcortical gray matter refers to regions that sit in the internal regions of the brain which are often important for emotional functions but also memory and general functional processing. As I said, gray matter houses your neurons, brain cells
  • Less white matter  -  white matter refers to the mass of connections between brain regions. So, this suggests less connections between all brain regions, or less efficient connections.
  • Fewer and shallower folds in the brain – the folds in the brain give it that wrinkly look and allows the brain to have more surface area but is also a sign of a mature or more functional brain.

This is quite dramatic  –  though the absolute differences may not be large, it all points to a less developed, or functional brain, at all levels. This was simply comparing two groups of newborns shortly after birth. This means these babies are at a disadvantage right from the outset - even before anything else happens these kids are starting at -1.

This is worrying and another study from the same dataset asked another question.

How does crime exposure affect newborns’ brains?

For this study they analysed what neighbourhoods these pregnant women lived in and hence their potential exposure to property or violent crime. And the results again are worrying. But the results were different: in the aforementioned study the results seemed to impact the whole brain and not specific regions of it but in this study various functional networks were affected.

brain scans

A number of networks were affected but the most relevant is that of the thalamus-amygdala-hippocampus network. This may sound like gobbledygook to you but this is a network that connects sensory information to emotional responses and to memory functions. So, in short disrupted emotional and memory networks.

The same applies as to the previously mentioned study. This was in newborns with just the mothers living in higher crime neighbourhoods  –  just this was enough to see a significant difference in these newborn babies’ brains.

So, those kids born in poverty with these mothers being exposed to crime during pregnancy seem to be starting life at -2. Decreased brain maturity and disrupted emotional and memory networks. Not good, very bad indeed.

It is also really important to note that we haven’t even begun to speak about developmental factors and how these brains can and do develop in socially deprived environments, nor have we spoken about epigenetics, such as how stress can pass an gene activation patterns to offspring.

This also shows that breaking out of this cycle requires more than just proclaiming that people need to make the good choices in life. Of course, they do, but starting out with a brain that is already less developed and with disrupted networks is only likely to perpetuate this poverty cycle.

What about brain development?

We do know, of course, that there are many developmental factors that can and do contribute to brain development of children in positive ways. In this article here I outline the ground-breaking research that showed that care for children could massively boost IQ.

The Abecedarian Project in the USA showed that pre-school education could leave traces in the brain that could be seen 50 years later. Similarly, breast feeding has been shown to improve the brain health of children and also of mothers  –  and, again, this can be seen decades later in the brain. In addition, exercise and movement improves children’s brain signatures  –  with exercise in pre-teen years leaving a signature on the brain also observable many years later.

That is all good but what the observant amongst you will notice is these are also often related to social standing.

Pre schooling  -  particularly high quality pre schooling is basically only available for those who can afford it or live in the right neighbourhoods. High quality nutrition also.

Breastfeeding may seem like a cheap option to help with your kids’ brain development, but this necessitates actually being able to breastfeed with your children, the mother having the right nutrition, and being able to do this. If a mother is living in poverty and trying to hold down two jobs to feed herself and her children, this may be out of the question. And often is.

Similarly, taking part in structured sporting activities is something that comes with social settings  -  but it is something that could be a cost-effective intervention for many children.

A just society?

So, if we do want a society that can grow and flourish, if we want a just society, if we want a good society, we should pay close attention to this.

Development of children’s brains happens before they are born - interventions that help pregnant mothers, particularly those who are impoverished, will have a significant benefit on those babies’ brains. Similarly investing in interventions pre-school also.

The worrying take-away, and important message, is that poverty really does mess with your brain. It does this as an adult but more importantly, as I have just outlined, based on scientific evidence, it messes with your brain right from the outset  -  from before you are born.

This also massively raises the importance of investing in and enabling interventions at this stage  – guided by science rather than political opinions.

After all who wouldn’t want a society with better brains. I do

 

 

 

Andy Habermacher

Andy Habermacher

Andy is author of leading brains Review, Neuroleadership, and multiple other books. He has been intensively involved in writing and research into neuroleadership and is considered one of Europe’s leading experts. He is also a well-known public speaker speaking on the brain and human behaviour.

Andy is also a masters athlete (middle distance running) and competes regularly at international competitions (and holds a few national records in his age category).

twitter / LinkedIn

References

Regina L. Triplett, Rachel E. Lean, Amisha Parikh, J. Philip Miller, Dimitrios Alexopoulos, Sydney Kaplan, Dominique Meyer, Christopher Adamson, Tara A. Smyser, Cynthia E. Rogers, Deanna M. Barch, Barbara Warner, Joan L. Luby, Christopher D. Smyser.
Association of Prenatal Exposure to Early-Life Adversity With Neonatal Brain Volumes at Birth. 
JAMA Network Open, 2022; 5 (4): e227045
DOI: 10.1001/jamanetworkopen.2022.7045

Rebecca G. Brady, Cynthia E. Rogers, Trinidi Prochaska, Sydney Kaplan, Rachel E. Lean, Tara A. Smyser, Joshua S. Shimony, George M. Slavich, Barbara B. Warner, Deanna M. Barch, Joan L. Luby, Christopher D. Smyser.
The Effects of Prenatal Exposure to Neighborhood Crime on Neonatal Functional Connectivity. 
Biological Psychiatry, 2022
DOI: 10.1016/j.biopsych.2022.01.020

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Two Hopeless Little Girls Abandoned to a Mental Institution — With Astounding Results

Two Hopeless Little Girls Abandoned to a Mental Institution — With Astounding Results

An Astounding and Underated Story of Brain Development

​Reading time: about 7 minutes

orphan brain development

The story goes that Harold M. Skeels, on taking over responsibility for the Iowa state psychiatric institutions in 1938, walked into the Iowa State orphanage which was situated within a complex including wards for the mentally retarded and sick, and saw two little girls sitting on the floor whining and crying and rocking back and forth.

He described them as such:

The youngsters were pitiful little creatures. They were tearful, had runny noses, and coarse, stringy, and colorless hair; they were emaciated, undersized, and lacked muscle tone or responsiveness. Sad and inactive, the two spent their days rocking and whining”

This was back in 1938 and these institutions are what would be unthinkable today. This was one large ward with dozens children in it and only two nurses to look after them. One of the key roles of the orphanage was also to find or match children to potential adoptive parents. However, under state law those considered retarded couldn’t be put up for adoption. These two girls, as you can see from the outline above were considered retarded with estimated IQs of between 35 and 46 (100 being the norm).

A Harsh Decision

With no beds free and children to be admitted, Skeels made what sounds like a harsh decision. Skeels was not a bad man, on the contrary, he was a very good man, but he did need space to look after more children. He therefore made the decision to have these two unresponsive retarded girls moved to a ward for women who were themselves considered retarded or mentally sick. A side note is that in this dark chapter of US history many things could lead to women being considered “feeble of mind”.

So, these two girls transferred, their needs would be taken care of. They had warmth, protection, shelter, and nutrition. He left to tour and attend to other businesses in other locations. He returned three months later.

On his return he went to the ward to check up on these two girls. What he found was astounding — and also went against all beliefs held at the time: what it took to bring up children, who could do this, and whether you were born with intelligence, or born an imbecile.

The Transformation

On entering the ward he was met with two unrecognisable little girls. The girls were little bundles of energy and activity. Full of life and responsive to those around them. A transformation so complete he at first did not believe these were the same girls. They were.

This went against everything everyone assumed at the time. You were born with a good mind or bad. You were retarded or you weren’t. If you were mentally ill, or retarded, there is not way possible that you could be a good mother. Yet, here he had evidence to the contrary — two little retarded girls had over period of only three months been transformed.

He measured their IQs and they came in at 77 and 87, no longer considered retarded. This was measured again a few months later and IQ scores for both girls were now mid 90s close to the norm.

How Could This Happen?

This was the question he asked himself, and then asked the nurses, and the women on the ward, but also observed them over the next few months.

What had happened is that these children were met with warmth, love, and heaps of attention. This was also the best thing to happen to the nurses on the ward and the women in the ward. What happened is one of the women become a main motherly figure and the other women become doting and loving aunts.

They stimulated them, played with them, comforted them, catered to their needs, made them toys, knitted them clothes. These girls had moved from a large ward with no attention to an environment full of love, attention, and stimulation. And it is this that led these girls within a short period of time to blossom.

It showed a number of important things. First, IQ, particularly in younger years, is not static but is as much as an environmental factor as genetic factor. Second, that to be a good parent you just needed love and the ability to care and give children the attention they need.

But was this really the case? To prove it Skeels set up an experiment that would be unthinkable today.

The Experiment

Based on this extraordinary experience, and full of excitement Skeels and a colleague, Dye, made a request to the authorities to run an experiment. In this they planned to place children in the mental health ward, and then follow their progress in contrast to another group kept in the orphanage.

They selected 13 one to two-year olds 11 of whom were classed as retarded (average IQ 67) and so unsuitable for adoption. These were now placed with teenage girls with mental retardation who lived at the institution. However, in contrast to the first girls, these young women were taught and guided in how to give basic care and attention to these young children. In addition the young children also attended a half morning kindergarten programme at the institution.

12 children were selected for the contrast group. These were kept at the orphanage as normal. Their IQs averaged 87 and only two were classed as mentally retarded.

What Happened?

After two years all the children were tested again — with astounding results.

Thos children who had been assigned to “mothers” showed an average improvement of IQ score of 27.5 points. This was enough for 11 of the 13 to become eligible for adoption. This was an amazing result in itself but even more so when contrasted to the “control” group — those who had stayed in the orphanage.

Those who had stayed in the orphanage showed an average decrease of 26 IQ points. They hence moved from hovering around below average IQ to mentally retarded.

This is in itself a fascinating and powerful piece of evidence. But it becomes even more powerful because 25 years later Skeels then managed to track down the majority of the children to gauge how well they had fared in life.

From Retardation to Contributing to Society

Form the 13 children in the experimental group 11 had married and this led to 9 children, all of normal intelligence it should be noted. The median educational level was 12th grade and four had attended college. The jobs ranged from homemaker to business and professional work with only those two who had not been adopted working in domestic services.

In contrast those 12 children who had remained in the orphanage for the study fared much less positively. The median level of education was only the third grade. Four were still institutionalised, and the others all worked in unskilled jobs (except one).

What has Changed?

Skeels noted in his follow up study that if his work could just stimulate some change or further research his work had been a success. He noted the obvious that there is potential in many children that cannot be unlocked because of the condition and environments they are in.

His work did indeed contribute to the changes in the orphanages and so was a resounding success. What is also forgotten is that because of prevailing opinions at the time his work was attacked viciously by many within and without the academic community. It takes a lot to change entrenched opinions.

There have been multiple other studies — of note are the orphanage studies which came about after the collapse of the Ceaușescu regime in Romania and children we found in dire conditions in dozens of orphanages. The result echoed those of Skeels study. Give the children good homes and their intelligence and behaviour rockets. However, this did depend on age and how long they had been institutionalised.

Remaining Persistent Opinions

I use the Skeels case in my talks on the brain and how this illustrates the plasticity of the brain — how the brain can and does change. But also how it clearly shows that human needs are critical to healthy development — our SCOAP model.

And though there is now also plenty of research into the brain science of what happens and how connections between brain cells can be destroyed with adversity in early childhood, it still feels like society doesn’t fully appreciate the value of enabling all young children to have access to education, stimulation, but also love and care.

We still seem to blame the mother or the person. The “they are born that way” mantra sits deep and strongly in human beings. No, the message is clear, they are that way because of their environment.

Skeels study also did not become as well-known as it deserved. On review there were multiple problems with the study, but that detracts from the overriding message. But societies and governments, in many countries, do now provide much better support for children, thankfully.

But it is still a useful reminder that investing in early childhood support for everybody in society is probably one of the best things you can do for society. it’s also a useful reminder of what human needs (SCOAP) can do for all of us

Andy Habermacher

Andy Habermacher

Andy is author of leading brains Review, Neuroleadership, and multiple other books. He has been intensively involved in writing and research into neuroleadership and is considered one of Europe’s leading experts. He is also a well-known public speaker speaking on the brain and human behaviour.

Andy is also a masters athlete (middle distance running) and competes regularly at international competitions (and holds a few national records in his age category).

twitter / LinkedIn

References

Skeels Studies

Skeels, H M & Dye, H B (1939)
A study of the effects of differential stimulation on mentally retarded children
Proceedings and Addresses of the American Association on Mental Deficiency 44(1), 114–136.

Skeels, H. M. (1966)
Adult Status of Children with Contrasting Early Life Experiences: A Follow-Up Study.
Monogr. Soc. Res. Child Dev. 31.
doi:10.2307/1165791.

Articles

Long read on the Romanian orphans at the Atlantic

Long read on the Romanian orphans in the Guardian

Book

Brookwood, M. (2021)
The Orphans of Davenport: Eugenics, the Great Depression, and the War Over Children’s Intelligence.
New York: Liveright Publishing Corporation.

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Brain Scans Can Predict Your Political Affiliation

Brain Scans Can Predict Your Political Affiliation

Quick Hits
Daily brief research updates from the cognitive sciences

social brain

Brain scanning of political partisans is not new and it has long been reported that brain scans can predict political affiliation. But those studies were scans of political partisans in situation that elicited emotional responses such as looking at pictures of political candidates or asking questions on policy issues.

The question these researchers wanted to answer is can you predict a person’s political affiliation just by looking at their brains while they were doing random tasks or even nothing at all!

What did these researchers at Ohio State University do?

The researchers recruited 174 participants to take part in the study and questioned them on their political affiliation and the intensity of this. They then underwent various brain scans while doing various standard testing activities. These activities were unrelated to politics. These included reward response tasks, clicking quickly on screen to receive a reward, empathy tasks, short-term memory task, episodic memory, matching names to faces, and more.

Interestingly they also did resting state scans, scanning the brain while doing nothing.

By measuring functional connectivity i.e. how brain regions connect they were then able to match correlations to political ideologies.

What did they find?

And yes, they found that using this functional connectivity they could predict political affiliation as effectively as with the best other predictor. What is the best other predictor you may ask? It is the political affiliation of your parents.
What is more interesting is that this correlation was just as effective by looking at resting state brain activity – so by looking at your brain at rest they could predict political affiliation.

It is not a perfect correlation but nevertheless intriguing and fascinating at the same time.

An additional note is that the reward task was most predictive of political extremism, showing a surprisingly high corelation, which shows that politics seem to resolve around emotionality. Just what this could mean is another question for further research.

So, is there a conservative brain and liberal brain (in the USA that is)? It certainly seems so

Andy Habermacher

Andy Habermacher

Andy is author of leading brains Review, Neuroleadership, and multiple other books. He has been intensively involved in writing and research into neuroleadership and is considered one of Europe’s leading experts. He is also a well-known public speaker speaking on the brain and human behaviour.

Andy is also a masters athlete (middle distance running) and competes regularly at international competitions (and holds a few national records in his age category).

twitter / LinkedIn

Reference

Seo-Eun Yang, James D Wilson, Zhong-Lin Lu, Skyler Cranmer. 
Functional Connectivity Signatures of Political Ideology. 
PNAS Nexus, 2022;
DOI: 10.1093/pnasnexus/pgac066

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