Sorry, but four extra years of school will NOT raise an average kid’s IQ from 100 to 120..,,.l
Here is one study that shows IQ increases with education, indicating it is not static.
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How Much Does Education Improve Intelligence? A Meta-Analysis - PubMed
Intelligence test scores and educational duration are positively correlated. This correlation could be interpreted in two ways: Students with greater propensity for intelligence go on to complete more education, or a longer education increases intelligence. We meta-analyzed three categories of...pubmed.ncbi.nlm.nih.gov
Across 142 effect sizes from 42 data sets involving over 600,000 participants, we found consistent evidence for beneficial effects of education on cognitive abilities of approximately 1 to 5 IQ points for an additional year of education. Moderator analyses indicated that the effects persisted across the life span and were present on all broad categories of cognitive ability studied. Education appears to be the most consistent, robust, and durable method yet to be identified for raising intelligence.
Here is another article that does equate doing well in school with higher IQ, but notes that does not necessarily translate into better life outcomes (or success). It also notes the limitations of IQ and even the fact there is no standard way of defining intelligence.
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Do People With High IQ Enjoy Greater Success?
High IQ people are often assumed to be more successful, but research shows that the connection between IQ and success is complicated. Learn what research has shown.www.verywellmind.com
Limitations of IQ Tests
It is important to remember that IQ testing has both limitations and biases. IQ tests only measure a specific range of mental abilities, but not all experts agree on a standard definition of intelligence.
Some tests may be more reliable than others, but it is also possible that IQ scores can change over time. Many factors can affect IQ test scores, including access to education, cultural factors, overall health, and nutrition.
The way that tests are constructed and scored can also affect scores. Some research also indicates that many IQ tests are biased against certain groups of people.
This article refers to a study from 1959 that was significant in size and long term followup of high IQ people, so it is old, but I am not sure if there are new studies that followed a group long term that supersede it.
It does note the following:
Still, Terman noted that most pursued more humble occupations, including police officers, sailors, typists and filing clerks. He ultimately concluded that "intelligence and achievement were far from perfectly correlated."
There are also individual and societal downsides. Some studies have found high IQ is also associated more frequent and earlier drug abuse, higher incidents of major mental illness such as depression, anxiety and bipolar disorder as well as ADHD and autism.
Link: High intelligence: A risk factor for psychological and physiological overexcitabilities
There clearly is a lot more to intelligence than what can be measured in an IQ test. It is also clear while IQ is correlated with academic success, it is also malleable through other factors such as education, nutrition and environment and isn’t always correlated with life success. Intelligence is still poorly understood and more than likely a composite of multiple, separate attributes of which only is understood and measured in a standard IQ test. High IQ also seems to be associated with higher rates of negative outcomes such as mental illness.
So given all that…why this emphasis on Race and IQ and, with people like Hector, eugenics? Have you never questioned the motivations behind this pseudo-science labeled “Race Realism”?
Twin studies show that heritability of intelligence ranges from 57% to 80%. Regardless, the MAJORITY of intelligence is inherited. (Link below.)
Society would be better off if we could acknowledge that some people are college material, while most are not. That way we could encourage the average kids to vocational training rather than have them struggle through college, often dropping out, and with student loans to boot.