But Cold Spring Harbor said it was now stripping him of those titles after he said his views had not changed in the documentary American Masters: Decoding Watson, aired on U.S. public broadcaster PBS earlier this month. Studies, such as this 2016paper in the journal of Personality and Individual Differences, have refuted the belief that average I.Q. differences can be explained by genetics.
The remarks are the latest in a series of racist and homophobic statements that have tainted Watson's career, CNN reported. He also said he took no joy in "the difference between blacks and whites" and that "it's terrible, just like it's very bad for schizophrenics". The board of trustees at Cold Spring Harbor Laboratory on Long Island described the views of Dr Watson as reprehensible.
In 2007, Dr Watson was removed as Chancellor and relieved of all administrative duties when he told The Sunday Times that the prospect of Africa was "inherently gloomy" as "all our social policies are based on the fact that their intelligence is the same as ours - where all the testing says not really".
This time the laboratory is stripping him of his remaining honorary titles, including honorary trustee and chancellor emeritus.
"Dr Watson's statements are reprehensible, unsupported by science", the laboratory said in a statement, adding that they effectively reverse his apology.
The graduate school of biological sciences at the research center is named for Watson, and the laboratory held a 90th birthday party for him in the spring.
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On Friday January 11 he was stripped of several honorary titles by Cold Spring Harbor Laboratory, in NY, which he once headed.
He also said that while he wished the races were equal, "people who have to deal with black employees find this not true".
In the documentary he admitted that his views on race and intelligence had not changed - "not at all".
He and British biologist Dr Crick were awarded the Nobel Prize in Physiology or Medicine in 1962 for their discovery nine years earlier of the double helix structure of DNA, the molecules that carry all the genetic information determining how we grow, function and reproduce.
CNN has attempted to reach Watson for comment.
But Watson became a pariah in the scientific community when his controversial views came to light.