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Environment shapes emotional cognitive abilities more than genes (neurosciencenews.com)
98 points by NalNezumi on April 21, 2024 | hide | past | favorite | 27 comments


I've been pondering this lately because of the dynamics of myself and my siblings. We did have a rough time growing up and my mother did the best she could in a bad situation. From a large gaggle of siblings and cousins, I am the only one who emerged into a middle class life with an interesting career. Poverty, addiction, and early death are the norm for my family.

My mother was nurturing and supportive. She realized my potential and encouraged me the entire time. I help support her these days and I'm proud she lives well. We talk on the phone frequently about philosophy, religion, politics and more. She is lively and engaged. Yet my half brother and sister complain endlessly how their lives were ruined by our mother. They have very detailed stories of privation and emotional abuse. They are older yet we lived together growing up. I don't recognize any of the things they claim. Its like they lived a completely different life. My mother takes their criticism to heart and it hurts when they loudly make these claims.

Yet, I must consider that my siblings seem emotionally stunted. I think this is genetic. At various times they both have demanded their "inheritance" early which is non-existent. My siblings fail the marshmallow test over and over again as adults. Any financial windfall is drained away immediately on frivolous items. I just found out my brother got a PPP loan somehow (he has zero employees) and spent the funds on a large van and a bunch of expensive guns. I'm guessing this will be eventually discovered and once again he will face dire consequences. (he just got his felony record expunged - hence the guns).

I don't know what to make of this. I feel like an alien being whenever I see my siblings or cousins. I live in a house and still have my teeth. I don't smoke meth or fent. Their life decisions are a mystery to me.


Well, I can vouch for your siblings’ experience. Both me and my brother were raised by same parents but we turned out very different. I remember endless poverty, my parents fighting, lot of chaotic moments regarding my education progress and merits, being chastised for every little mistake and a lot of abusive parenting in guise of strictness and it had been so traumatic that I still suffer from panic attacks when I have waves of my childhood.

My brother has an entirely different memory, loving and supportive nurturing parents, wealth and prosperity, very friendly parents who never fought, lots of social interactions, overall a good childhood.

The thing is, when I was the only child, my father was rising out of poverty, I was born to a very underaged mother(she decided to keep my while my father wanted abortion), then my parents had extremely unrealistic expectations and wanted to raise me as the ideal model kid and unintentionally abusing me by following wrong parenting advises from wrong people because sadly children do not come with a user manual(my mom’s joke). But once my brother came in the family, my father has achieved wealth and better understanding of parenting and was less stressed, so he and my mom took their lessons from my childhood and raised my brother correctly(imho).

So, it is indeed possible to have entirely different childhood for siblings in the same house. Heck, when my brother was growing up, I still suffered some old strict parenting which was only limited to me because the dynamic was already there for me, but my brother was different.

My so often realises these beahviors when we get together at my parent’s place. My brother is sometimes surprised that, the parenting I received was something that he could never withstand and he is grateful that my parents did not repeat that, though sometimes he also claims that it could be different generation thing.

That being said, I have no grudge against my parents, poverty can make people do weird things and parenting is hard. But yes, living on the same house under same parents, siblings can have polar opposite experience.


Have you considered that you might have been the golden child and they weren't?

People can cause great harm with the best of intentions. Especially when they are overwhelmed.

Children who have been neglected end up having impaired emotional regulation in adulthood. You can view it as genetics, or see it as a lesson of what you could have been had you been born in different shoes.

It isn't a satisfying conclusion or story, but it is what it is. What matters is picking up the pieces and moving on.


Raising children and watching others raise them, I compare notes in detail.

I recently had an outing where I was the only "active" father. I had a dozen children begging for my attention. They were cutting in line to engage with me. Other fathers looked on. They all knew my tricks, jokes but I was the only one engaging.

I do not hear about a father figure. Did you have one and they did not?

I ask because while single moms may put in the effort the results are inconsistent. I had a mostly absent father but his direction and instruction kept me grounded. I didn't thrive until a new father figure encouraged me and helped me see my potential.


> I recently had an outing where I was the only "active" father. I had a dozen children begging for my attention. They were cutting in line to engage with me. Other fathers looked on. They all knew my tricks, jokes but I was the only one engaging.

On occasion I'll go to the park to play with my son and other kids will start following us around and sometimes even come up and ask if I can also toss them around. (Sorry, no can do!)

Being a parent is a full contact sport. :D

It is sad so many adults are either unwilling or unable to engage with kids.


Not an expert, but I believe the human brain uses some mechanisms to stay on the same track even if there are problems with that track. Practically, if something bad did happen to your siblings and it was memorable, it's possible they held on to it and lived as though their lives were predetermined from that. This means they are choosing to ignore your example and your mom's example.

(edit: almost forgot, remember they are afraid of your mom and afraid of leaving their current state, contributes to them staying where they are)


I often think the same thing...usually one can cook up a theory of why something might have an evolutionary advantage, but this one kind of sticks out like a sore thumb. And on top of it, that our super advanced scientific culture full of experts pays little more than lip service (regardless of who is in power, and one doesn't have to be in power to push agendas) to the problem is also rather counterintuitive.


Children that grow up in narcissistic homes often report having different recollections of their childhoods based on the particular role assigned to them by the narcissistic parent. These roles range from golden child, to lost child, to scapegoat, truth teller and many more. Some children also end up taking on the enabler role unknowingly. My mom is a covert narcissist and it took me many, many decades to realize it since most of the literature online deals with overt narcissism. I don’t mean to sound prescriptive, this may or may not be relevant to your specific case but hopefully it’s helpful to someone in a similar situation as mine.


> My siblings fail the marshmallow test over and over again as adults.

The marshmallow test is one of those pseudo scientific things that fails to replicate. It’s not actually a thing and has no proven correlation to anything of substance.


I'd fail the marshmallow test. It's one extra marshmallow I'm losing, who cares?

Now, if it was $100,000/$200,000 instead of 1/2 marshmallows, the outcome would be completely different.

Regardless of whether the stakes are trivial or immense, the amount of thought, deliberation, and care going into the decision will be at least correlated with the stakes, for me.


Gp is invoking the pop-culture understanding of the marshmallow test as a rhetorical tool to underline a point. I don't think their siblings are being asked to defer literal marshmallows.


It's easy to fail this test when you know from your experience that you won't get the reward later on anyway.


> The investigators found that pairs of twins who had parents with higher levels of education and higher family incomes have similar results to each other, regardless of whether they were identical or fraternal. These observations suggested that familial environment was more likely to influence metacognitive abilities than genetics.

Do they? Couldn't this alternatively show that metacognitive abilities are more broadly heritable? I would've thought that a twin study where identical twins were raised in different environments would be far more instructive?

What am I missing here?


> I would've thought that a twin study where identical twins were raised in different environments would be far more instructive?

Both are instructive, but identical twins raised in different environment is a very small group compared to the other group, and there's a very strong confounding factor between them that's likely to have a massive impact on the later results: being separated from you twin brother/sister indicates you've had some pretty chaotic early life.


And isn't the womb an environment already?


Definitely (the most obvious illustration of this are alcohol or tobacco use during pregnancy, but there's likely millions of other factor playing a role as well).


Financial investment, nutrition and parental time investment have also shown significant impacts all forms of development (https://www.nominalnews.com/p/early-child-investment-child-t...). Discerning these impacts will always be difficult. Regardless, it appears that external factors do play a more an important role than maybe inherent ones.


This is similar to what I read in a book called "The Biology of Belief" by Bruce H. Lipton.


> Decades of extensive research utilizing the classical twin paradigm have consistently demonstrated the heritability of nearly all cognitive abilities so far investigated.

> “Our findings emphasize that these shared family environmental factors, such as parental nurturing and the transmission of cultural values, likely play a significant role in shaping the mental state representations in metacognition and mentalizing.”*

"Distinct Genetic and Environmental Origins of Hierarchical Cognitive Abilities in Adult Humans" (2024) https://www.cell.com/cell-reports/fulltext/S2211-1247(24)003... :

> Human cognitive abilities ranging from basic perceptions to complex social behaviors exhibit substantial variation in individual differences. These cognitive functions can be categorized into a two-order hierarchy based on the levels of cognitive processes. Second-order cognition including metacognition and mentalizing monitors and regulates first-order cognitive processes. These two-order hierarchical cognitive functions exhibit distinct abilities. However, it remains unclear whether individual differences in these cognitive abilities have distinct origins. We employ the classical twin paradigm to compare the genetic and environmental contributions to the two-order cognitive abilities in the same tasks from the same population. The results reveal that individual differences in first-order cognitive abilities were primarily influenced by genetic factors. Conversely, the second-order cognitive abilities have a stronger influence from shared environmental factors. These findings suggest that the abilities of metacognition and mentalizing in adults are profoundly shaped by their environmental experiences and less determined by their biological nature.


>These cognitive functions can be categorized into a two-order hierarchy based on the levels of cognitive processes. Second-order cognition including metacognition and mentalizing monitors and regulates first-order cognitive processes.

This way of modeling Cognitive functions in two distinct hierarchical ways, is it the same theory underlying the idea of "System 1 & System 2" presented in "Think fast and slow" by Daniel Kahneman?

How accepted/supported by empirical evidence is this model


There is observable hierarchy in visual and auditory cortical topology.

Is hierarchical clustering appropriate for cognitive processes?

Control for clusterable Personality factors, Attachment styles, Educational instruction styles, Parenting styles,

Cognitive psychology > Cognitive psychology vs. cognitive science: https://en.wikipedia.org/wiki/Cognitive_psychology#Cognitive...

Cognitive psychology > Cognitive processes: https://en.wikipedia.org/wiki/Cognitive_psychology#Cognitive...

Defence mechanism > Relation with coping; Mature defense mechanisms or not, a Boolean: https://en.wikipedia.org/wiki/Defence_mechanism

Social cognition > Social cognitive neuroscience: https://en.wikipedia.org/wiki/Social_cognition#Social_cognit...

Systems neuroscience: https://en.wikipedia.org/wiki/Systems_neuroscience

Hypotheses: Theory of mind is advantageous in assessments emotional cognitive abilities, and even an NT or non-NT Boolean factor also predicts variance in the given assessments

Theory of mind > Brain mechanisms: https://en.wikipedia.org/wiki/Theory_of_mind#Brain_mechanism...

Three-Stratum Theory: https://en.wikipedia.org/wiki/Three-stratum_theory :

> The three-stratum theory is a theory of cognitive ability proposed by the American psychologist John Carroll in 1993.[1][2] It is based on a factor-analytic study of the correlation of individual-difference variables from data such as psychological tests, school marks and competence ratings from more than 460 datasets. These analyses suggested a three-layered model where each layer accounts for the variations in the correlations within the previous layer.

> The three layers (strata) are defined as representing narrow, broad, and general cognitive ability. The factors describe stable and observable differences among individuals in the performance of tasks. Carroll argues further that they are not mere artifacts of a mathematical process, but likely reflect physiological factors explaining differences in ability (e.g., nerve firing rates). This does not alter the effectiveness of factor scores in accounting for behavioral differences.

There are multiple methods of studying neural topology and emergent cognitive processes, and their possibly hierarchically clusterable topology in feature space. What are some of the current developments in neural topology and feature clustering?

Three-Stratum Theory > See also lists: CHC, g-factor, Fluid and crystallized intelligence, and g-VST (2005).

CHC: Cattell–Horn–Carroll theory: https://en.wikipedia.org/wiki/Cattell%E2%80%93Horn%E2%80%93C...

g-VPR (2005): https://en.wikipedia.org/wiki/G-VPR_model

/? hierarchy of cognitive processes: https://www.google.com/search?q=hierarchy+of+cognitive+proce... https://scholar.google.com/scholar?hl=en&as_sdt=0%2C43&q=hie...

Neurodevelopmental framework for learning > Other learning frameworks references e.g. CHC and further developments in education: https://en.wikipedia.org/wiki/Neurodevelopmental_framework_f...

OTOH other factors to control for: postal code and school funding and teaching practices in those years,

Compensatory education: https://en.wikipedia.org/wiki/Compensatory_education

Remedial education > Research on outcomes: https://en.wikipedia.org/wiki/Remedial_education

Learning styles: https://en.m.wikipedia.org/wiki/Learning_styles :

> [...] specific study strategies, unrelated to learning style, were positively correlated with final course grade.[46]

Differentiated instruction: https://en.wikipedia.org/wiki/Differentiated_instruction :

> Teachers can differentiate in four ways: 1) through content, 2) process, 3) product, and 4) learning environment based on the individual learner. [7]*

But FWIU none of these models of cognitive hierarchy or instruction are informed by newer developments in topological study of neural connectivity; from https://news.ycombinator.com/item?id=18218504 :

> According to "Cliques of Neurons Bound into Cavities Provide a Missing Link between Structure and Function" (2017) https://www.frontiersin.org/articles/10.3389/fncom.2017.0004... , the human brain appears to be [at most] 11-dimensional (11D); in terms of algebraic topology https://en.wikipedia.org/wiki/Algebraic_topology


There is math for classical causal inference with observational data; that FWIU also hasn't been applied to cognitive outcomes studies.

From "The World Needs Computational Social Science" https://news.ycombinator.com/item?id=37746921 :

> "Answering causal questions using observational data" (2021) [PDF] https://www.nobelprize.org/uploads/2021/10/advanced-economic... https://www.nobelprize.org/prizes/economic-sciences/2021/pop...


Si se puedes!

Emotional self regulation is a normed behavior that is modelable.

Head start programs would thus be justified in having SEL Social and Emotional Learning components; but how much more effective is parental behavioral modeling than non-parental caregiving?

Can't be done.

In Africa, they say "It takes a village".

One of perhaps 20 questions to split the sets with: "Can people change?"


fulltext: https://www.cell.com/cell-reports/fulltext/S2211-1247(24)003...

> It takes a village

Compare the first 36 characters of the 3 Character Classic: https://ctext.org/three-character-classic

> Can people change?

With training, dogs and horses improve their cross-species mentalizing; I'd hope training humans on same-species would be even easier.


There appears to be hippocampal neurogeneration even in old age.

From "Multiple GWAS finds 187 intelligence genes and role for neurogenesis/myelination" (2018) https://news.ycombinator.com/item?id=16337941 :

> re: nurture, hippocampal plasticity and hippocampal neurogenesis also appear to be affected by dancing and omega-3,6 (which are transformed into endocannabinoids by the body): https://news.ycombinator.com/item?id=15109698

Neuroplasticity: https://en.wikipedia.org/wiki/Neuroplasticity

Adult neurogenesis: https://en.wikipedia.org/wiki/Adult_neurogenesis

When we forget, we must re-learn. By studying forgetting, we learn about learning and creativity.

Forgetting curve: https://en.wikipedia.org/wiki/Forgetting_curve


100% true


It's comforting to see the data bear Tabula Rasa out.




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