[3] He lectures in schools on the subject of PSHE (Personal, social health and economic) education.
[1] He has published medical journal articles and has authored books on alcoholism, eating disorders and children's screen time.
[1] In 2009, an opinion by Sigman was misused as the basis for articles in the Daily Mail and other outlets which falsely implied that using Facebook could directly cause cancer.
[4] Physician and science writer Ben Goldacre has said that Sigman's work includes cherry picking of other scientist's studies to support a specific view.
[5] In response to these claims Sigman said that "It was clear that my article on daycare wasn't a scientific paper.