Thomas J. Bouchard Jr.

In 1994, he was one of 52 signatories of Mainstream Science on Intelligence, a public statement written by Linda Gottfredson and published in The Wall Street Journal. This statement was a response to what the authors considered as the inaccurate and misleading reports made by the media regarding academic consensus on the results of intelligence research after the publication of The Bell Curve earlier the same year. The next year, he was part of task force commissioned by the American Psychological Association which released a consensus statement on the state of intelligence research titled Intelligence: Knowns and Unknowns.

One of Bouchard's case studies was Jim Springer and Jim Lewis (so-called Jim twins), twins who had been separated from birth and were reunited at age 39. Bouchard arranged to study the pair, assembling a team and applying for a grant to the Pioneer Fund during 1981. According to The Washington Post, the twins "found they had each married and divorced a woman named Linda and remarried a Betty. They shared interests in mechanical drawing and carpentry; their favorite school subject had been math, their least favorite, spelling. They smoked and drank the same amount and got headaches at the same time of day." According to The New York Times they both also owned a dog named "Toy", and had named their first son almost identically, "James Allan" and "James Alan".

Thomas J. Bouchard Jr. (born October 3, 1937) is an American psychologist known for his behavioral genetics studies of twins raised apart. He is professor emeritus of psychology and director of the Minnesota Center for Twin and Adoption Research at the University of Minnesota. Bouchard received his PhD from the University of California, Berkeley in 1966.