In an internal review conducted at JAMA's request, a Cornell faculty committee reported a litany of faults with Wansink's research, including "misreporting of research data, problematic statistical techniques, failure to properly document and preserve research results, and inappropriate authorship".
Wansink helped update the USA dietary guidelines and his work was frequently cited across the headlines, from Fox News to CNN.
In this December 6, 2016 file photo, Brian Wansink speaks during an interview in the produce section of a supermarket in Ithaca, N.Y. On Thursday, Sept. 20, 2018, the prominent Cornell professor announced heÂs retiring after a medical journal retracted six of his food research papers.
The Journal of the American Medical Association (JAMA) announced Wednesday that six of Wansink's research articles published in its network of journals had been retracted after JAMA raised concerns about their validity. People eat more when they're served foods in large bowls, he wrote, and when they're watching an action movie, and when they sit close to the buffet at an all-you-can-eat restaurant. "What we did not keep over the past 25 years are the original pencil and paper surveys and coding sheets that were used in these papers". He said he was proud of the papers and was confident they'll be replicated by others.
Wansink has had 13 scientific articles retracted during his career, including one that was retracted, replaced and retracted again, according to the blog Retraction Watch.
"The way he talked about his research was highly questionable", van der Zee said. He admitted to mistaken reporting, poor documentation, and "some statistical mistakes", but maintains that there was "no fraud, no intentional misreporting, no plagiarism, or no misappropriation" in his work.
Cornell announced Wansink will spend the rest of his time at the Ivy League school aiding in the investigation into his previous work.