The Payne Fund Studies were a series of studies conducted to determine the effects of movies on the behavior of children and adolescents. They were paid for by The Payne Fund, a private foundation, and performed in the late 1920s and early 1930s. They have been criticized as lacking scientific rigor but were the first attempt to rigorously study the media. They were politically significant and were instrumental in the enforcement of the Hays Code. They are credited with contributing to the demise of Pre-Code film-making inHollywood.