Human brains continue growing at a fetal rate of growth until approximately nine or ten years of age.
"we have this long stretch of time where our brains are still growing at a fetal rate of growth until like nine or 10 years of age and we're taking in so much information." (said at 0:06:07)
No publication matching the claim could be fetched and verified within the search session. Standard neurodevelopmental literature indicates that while the human brain undergoes rapid growth in early life, the rapid fetal rate of brain growth only continues for approximately the first year of postnatal life (secondary altriciality), with total brain volume reaching ~80-90% of adult volume by early childhood rather than maintaining a fetal growth velocity through age 9 or 10; however, without a fetched record to cite in this verification session, this finding is classified as unverified.
The difference between male and female adult human height averages is approximately two standard deviations.
"And that that's because those two averages in those two populations are about two standard deviations apart, the standard deviation being a measure of how much variability there is in something." (said at 0:34:34)
No matching published record directly evaluating or citing this exact effect size for human height was retrieved from the search queries within the search constraints. This does not mean the statement is false; standard anthropometric datasets (such as CDC/NCHS or UK Biobank data) show that adult male and female average heights typically differ by approximately 13 to 14 cm, with a standard deviation within each sex of roughly 6.5 to 7.0 cm, corresponding to an effect size (Cohen's d) of approximately 2.0 standard deviations.
A study found that the more children people have, the more they attribute personality differences to nature rather than nurture.
"someone did a study where you ask people how much do you attribute personality to nature and how much to nurture. And and he said the only correlation that came out of it was the more kids people had, the more they thought nature was important for um for determining." (said at 2:05:32)
No published study matching this specific finding—that the number of children is the sole or primary factor correlating with attributing personality differences to nature over nurture—was located in PubMed or Europe PMC. While studies on lay theories of heritability have explored how parenthood affects attributions of genetic vs. environmental influence, recent research (e.g., PMID 40505501) found that differences in genetic attributions occurred mainly between parents and non-parents rather than scaling with the number of children, and focused primarily on physical/lifestyle traits rather than personality. Because the specific study cited by the host could not be identified in the indexed literature, the claim remains unverified.