Jay Joseph
@jayjoseph22.bsky.social
Psychologist/author deconstructing behavioral/psychiatric genetic research and theories. Author of "Schizophrenia and Genetics: The End of An Illusion" (2023). https://jayjoseph22.substack.com/
In an ironic historical twist, the criminal behavior of two German men may have been influenced by "syndromes" associated with each other's names.
November 13, 2025 at 4:50 PM
In an ironic historical twist, the criminal behavior of two German men may have been influenced by "syndromes" associated with each other's names.
Ironic he had "Kallmann Syndrome." FJ Kallmann was a fanatical racial hygienist and schizophrenia family/twin researcher during the Third Reich. He advocated forcibly sterilizing German "schizophrenic taint carriers" and some of their relatives. Had to leave Germany in 1936 due to Jewish ancestry.
November 12, 2025 at 8:28 PM
Ironic he had "Kallmann Syndrome." FJ Kallmann was a fanatical racial hygienist and schizophrenia family/twin researcher during the Third Reich. He advocated forcibly sterilizing German "schizophrenic taint carriers" and some of their relatives. Had to leave Germany in 1936 due to Jewish ancestry.
Wow. Who is this "blank slate Lysenkoist"? Any guesses?
October 17, 2025 at 6:16 PM
Wow. Who is this "blank slate Lysenkoist"? Any guesses?
Really? Systematic racism is built into IQ tests, which are designed to produce ethnic but not gender differences. Murray and Pinker assume ethnic differences are influenced by genetics, when there is no scientifically valid evidence supporting even WITHIN-group "heritability" osf.io/preprints/ps...
October 15, 2025 at 3:07 PM
Really? Systematic racism is built into IQ tests, which are designed to produce ethnic but not gender differences. Murray and Pinker assume ethnic differences are influenced by genetics, when there is no scientifically valid evidence supporting even WITHIN-group "heritability" osf.io/preprints/ps...
Psychiatric Genetics founder Ernst Rüdin co-wrote the 1934 book promoting and explaining the 1933 Nazi forced sterilization law. Rüdin showed doctors how to perform the procedure. The law was based on eugenic junk science, and about 6,000 people died as a direct result of the procedure.
September 5, 2025 at 2:21 AM
Psychiatric Genetics founder Ernst Rüdin co-wrote the 1934 book promoting and explaining the 1933 Nazi forced sterilization law. Rüdin showed doctors how to perform the procedure. The law was based on eugenic junk science, and about 6,000 people died as a direct result of the procedure.
This massively and openly p-hacked schizophrenia adoption study was published 50 years ago, and is still cited in most psychiatry textbooks. If p-hacking and relying on faulty assumptions are "highly heritable traits," this would explain most psychiatric genetic research "findings."
September 4, 2025 at 9:01 PM
This massively and openly p-hacked schizophrenia adoption study was published 50 years ago, and is still cited in most psychiatry textbooks. If p-hacking and relying on faulty assumptions are "highly heritable traits," this would explain most psychiatric genetic research "findings."
Interesting article. If the NY Times approached behavioral and psychiatric genetic research publications with the same level of scrutiny, as opposed to its usual practice of reporting them as examples of solid science, both fields might collapse.
August 21, 2025 at 10:46 PM
Interesting article. If the NY Times approached behavioral and psychiatric genetic research publications with the same level of scrutiny, as opposed to its usual practice of reporting them as examples of solid science, both fields might collapse.
Over at X, "Grok" now cites Arthur Jensen and JP Rushton in favor of genetic "root causes" of racial differences in IQ scores.
July 22, 2025 at 3:55 AM
Over at X, "Grok" now cites Arthur Jensen and JP Rushton in favor of genetic "root causes" of racial differences in IQ scores.
Ten days ago, "Grok" said that group differences in IQ scores were caused by non-genetic factors (the "scientific consensus"). Now, after a well-documented recent pro-fascism algorithm adjustment, it cites twin studies and "The Bell Curve" as supporting "largely genetic" causes.
July 9, 2025 at 5:46 PM
Ten days ago, "Grok" said that group differences in IQ scores were caused by non-genetic factors (the "scientific consensus"). Now, after a well-documented recent pro-fascism algorithm adjustment, it cites twin studies and "The Bell Curve" as supporting "largely genetic" causes.
Between June 29th and July 6th, 2025, Grok was reprogrammed on the "racial differences in IQ scores" topic. In June, the "scientific consensus" strongly supported environmental causes. By July 6th, citing twin studies, Grok was claiming "largely genetic" causes while endorsing "The Bell Curve."
July 9, 2025 at 4:02 PM
Between June 29th and July 6th, 2025, Grok was reprogrammed on the "racial differences in IQ scores" topic. In June, the "scientific consensus" strongly supported environmental causes. By July 6th, citing twin studies, Grok was claiming "largely genetic" causes while endorsing "The Bell Curve."
Last June on Twitter, Hanania swooped in with a nonsensical post in response to an article I co-authored with @kenrich12.bsky.social on the flawed genetic evidence cited in "The Bell Curve." I invited him to read the article and point out where we got things wrong. Still waiting for his response.
July 4, 2025 at 3:58 PM
Last June on Twitter, Hanania swooped in with a nonsensical post in response to an article I co-authored with @kenrich12.bsky.social on the flawed genetic evidence cited in "The Bell Curve." I invited him to read the article and point out where we got things wrong. Still waiting for his response.
Over at the other site, at the request of a doubter, "Grok" AI backed up my position on the need for a DZ-apart (DZA) control group. So did Bouchard and Nancy Segal, who said that DZA twin pairs constituted the official Minnesota Study of Twins Reared Apart control group.
July 4, 2025 at 2:53 PM
Over at the other site, at the request of a doubter, "Grok" AI backed up my position on the need for a DZ-apart (DZA) control group. So did Bouchard and Nancy Segal, who said that DZA twin pairs constituted the official Minnesota Study of Twins Reared Apart control group.
@cremieuxrecueil blocked me on Twitter in 2023 after I showed that the authors of his favorite twin study, financed by the Pioneer Fund, suppressed their control group IQ correlations to find within-group genetic influences on IQ. Can't take the heat when the p-hacked science he cites is exposed.
July 4, 2025 at 1:25 AM
@cremieuxrecueil blocked me on Twitter in 2023 after I showed that the authors of his favorite twin study, financed by the Pioneer Fund, suppressed their control group IQ correlations to find within-group genetic influences on IQ. Can't take the heat when the p-hacked science he cites is exposed.
Relevant pages on how Herrnstein and Murray discussed the causes of racial group mean IQ score differences, taken from an article I co-wrote last year. (This preprint became a chapter in the edited book, "The Heredity Hoax" [2025].)
osf.io/preprints/ps...
osf.io/preprints/ps...
July 1, 2025 at 11:53 PM
Relevant pages on how Herrnstein and Murray discussed the causes of racial group mean IQ score differences, taken from an article I co-wrote last year. (This preprint became a chapter in the edited book, "The Heredity Hoax" [2025].)
osf.io/preprints/ps...
osf.io/preprints/ps...
Yes, as I and others have documented, there's a lot of history re-writing done by IQ hereditarians and other genetic determinists (TBC = The Bell Curve [1994 book]; B/W = supposed U.S. Black-White mean IQ score group differences).
July 1, 2025 at 10:08 PM
Yes, as I and others have documented, there's a lot of history re-writing done by IQ hereditarians and other genetic determinists (TBC = The Bell Curve [1994 book]; B/W = supposed U.S. Black-White mean IQ score group differences).
The "story so far" gets it wrong. Twin studies (based on false assumptions) go back to the 1920s and earlier, and eugenic policies and IQ hereditarianism were mainstream in the first half of the 20th century. DNA-based gene searches go back to the 1960s. All airbrushed in the Plominesque account.
June 27, 2025 at 2:52 PM
The "story so far" gets it wrong. Twin studies (based on false assumptions) go back to the 1920s and earlier, and eugenic policies and IQ hereditarianism were mainstream in the first half of the 20th century. DNA-based gene searches go back to the 1960s. All airbrushed in the Plominesque account.
There is a 56-year history of "genes for bipolar disorder" discovery claims that did not hold up. By default, we should assume that new claims continue this trend. It is unlikely that genes that cause the major psychiatric conditions exist, which explains decades of psychiatric genetics failure.
June 26, 2025 at 2:26 PM
There is a 56-year history of "genes for bipolar disorder" discovery claims that did not hold up. By default, we should assume that new claims continue this trend. It is unlikely that genes that cause the major psychiatric conditions exist, which explains decades of psychiatric genetics failure.
The most recent misguided attempt to show that socioeconomic status is "in the genes." I addressed the second-most recent attempt here:
jayjoseph22.substack.com/p/race-scien...
The wealthy hope to extend their country-club and U.S. “broligarch” chat group consensus into the scientific consensus.
jayjoseph22.substack.com/p/race-scien...
The wealthy hope to extend their country-club and U.S. “broligarch” chat group consensus into the scientific consensus.
June 11, 2025 at 7:49 PM
The most recent misguided attempt to show that socioeconomic status is "in the genes." I addressed the second-most recent attempt here:
jayjoseph22.substack.com/p/race-scien...
The wealthy hope to extend their country-club and U.S. “broligarch” chat group consensus into the scientific consensus.
jayjoseph22.substack.com/p/race-scien...
The wealthy hope to extend their country-club and U.S. “broligarch” chat group consensus into the scientific consensus.
If they ever create a Nobel Prize for openly p-hacked manipulation of data to confirm existing biases, I would nominate this 1971 article, still cited by psychiatry in favor of genetic influences on schizophrenia. jayjoseph22.substack.com/p/2023-book-...
June 8, 2025 at 3:47 PM
If they ever create a Nobel Prize for openly p-hacked manipulation of data to confirm existing biases, I would nominate this 1971 article, still cited by psychiatry in favor of genetic influences on schizophrenia. jayjoseph22.substack.com/p/2023-book-...
Well before initiating the Minnesota Study of Twins Reared Apart (MISTRA) in 1979, psychologist Thomas Bouchard believed that human intelligence "is largely under genetic control." The MISTRA results were later p-hacked to confirm this belief. jayjoseph22.substack.com/p/a-reevalua...
June 8, 2025 at 3:34 PM
Well before initiating the Minnesota Study of Twins Reared Apart (MISTRA) in 1979, psychologist Thomas Bouchard believed that human intelligence "is largely under genetic control." The MISTRA results were later p-hacked to confirm this belief. jayjoseph22.substack.com/p/a-reevalua...
50 years ago, Allan Chase published an article about how pellagra, caused by a poor people's vitamin-deficient diets, was once claimed to be a strongly genetic disorder. Perhaps future authors will write articles of this type about the major psychiatric conditions.
June 8, 2025 at 3:25 PM
50 years ago, Allan Chase published an article about how pellagra, caused by a poor people's vitamin-deficient diets, was once claimed to be a strongly genetic disorder. Perhaps future authors will write articles of this type about the major psychiatric conditions.
In 1964, leading behavioral geneticist Gerald McClearn was clear that the primary purpose of a heritability estimate (h²) was to predict the outcomes of eugenic selective breeding programs.
June 8, 2025 at 3:16 PM
In 1964, leading behavioral geneticist Gerald McClearn was clear that the primary purpose of a heritability estimate (h²) was to predict the outcomes of eugenic selective breeding programs.
Although the researchers have closely guarded their raw data and life history information, in 1981, journalist Peter Watson provided a small window on the lives of a pair of "separated identical twins" in the Minnesota Study of Twins Reared Apart.
June 7, 2025 at 3:11 PM
Although the researchers have closely guarded their raw data and life history information, in 1981, journalist Peter Watson provided a small window on the lives of a pair of "separated identical twins" in the Minnesota Study of Twins Reared Apart.
Any publication stating there are "studies [of] identical twins who were separated at birth and raised apart" should be disregarded. No such studies exist. For studies of reared-together twins, the author's defense of the identical-fraternal twin "equal environment assumption" was extremely weak.
June 7, 2025 at 1:58 PM
Any publication stating there are "studies [of] identical twins who were separated at birth and raised apart" should be disregarded. No such studies exist. For studies of reared-together twins, the author's defense of the identical-fraternal twin "equal environment assumption" was extremely weak.