[17] Aarhus University assembled a committee to investigate, and found him innocent of fraud, but guilty of "grossly negligent behavior" and gave him a severe reprimand.

[19] According to a 2006 news story in Science: "Colleagues from around the world have rallied to his defense, accusing the university of having political motives, and claiming that the errors in his research were trivial.

"[17] In 2011 Nyborg published "The Decay of Western Civilization: Double Relaxed Darwinian Selection"[20] in the journal Personality and Individual Differences, arguing that Denmark was likely to experience a dysgenic effect on intelligence due to immigration from the Middle East.

[26] This conclusion was based on the verdict of an ad hoc working group consisting of Ian Deary, Jelte Wicherts, John Loehlin and William Revelle.

[citation needed] Nyborg then sued the DCSD to get the verdict reversed, won his case in March 2016, and in addition was awarded costs of over 200,000 kr (approximately US$25,000).

[29] Nyborg has been criticised for holding pseudohistorical Nordicist and white supremacist beliefs linked to Richard Lynn's cold winter theory including the idea that ancient Egypt, Greece, and Rome civilisations were founded by central-northern European peoples who migrated south.

[4] Nyborg describes his idea as the “Thermodynamic Solar Irradiance Selection (TSIS) Hypothesis,” which argues "that “Northern brains” had given birth to most positive traits in society, including “altruistic sociability” and “potential for democracy.”[4] He has been quoted as saying (while relying on a map by Charles Murray), "almost all the major advancements in science and the arts since the 14th Century came from White males whose ancestors were born in a tiny, circumscribed chunk of Europe.

[30] In 2011, Nyborg was a speaker at a private seminar hosted by the Danish Society for Historical Research, titled "Revolt Against Civilization" that featured anti-Semites and white nationalists including David Duke former grand wizard of the Ku Klux Klan, Kevin MacDonald and Tomislav Sunić.

"[40] Nyborg is the editor of a 2003 festschrift, The Scientific Study of General Intelligence: Tribute to Arthur Jensen, published by Pergamon Press (ISBN 0080437931).

In 2012, he was the editor of a special issue of Personality and Individual Differences dedicated to celebrating the 80th birthday of another controversial psychometrician, British psychologist Richard Lynn.

[41] "The Danish developmental psychologist Helmuth Nyborg, a close associate of the authors [Lynn and Vanhanen, 2002], has repeatedly and openly expressed his racist and sexist opinions.

A number of Danish tabloids circulated his outrageous statements, e.g., “women are dumber than men,” Denmark has to forbid the reproduction of less , and assortative mating must become the norm.