James Jay Joseph (born April 13, 1959)[1] is an American clinical psychologist and author.
[2] His view, as he articulated in his 2003 book The Gene Illusion, is that such research is so flawed as to render all of its results completely meaningless.
[4][5] Joseph received his undergraduate education from the University of California, Berkeley.
[3] In 2014 he published The Trouble with Twin Studies, which argued that research based on twin studies was highly flawed and could not be used to prove heritability of traits, as they fail to adequately control for environmental factors, as well as accusations of ethics violations in research practices.
[6] The book was negatively reviewed by one psychologist, Eric Turkheimer, who argued that twin study research was valid.