In science, we never prove anything, but we do have supporting evidence. Here, Dr. Fisher and I disagree on the weight of the evidence because I and my colleagues have published at least 20 studies on violent pornography, and while some of them have been in the laboratory, some of them have not. What Dr. Fisher and I may have common ground on is that when you do research in naturalistic settings, in real world settings, people don't just watch violent pornography or nonviolent pornography. It's very difficult to disentangle. You can say that for people who watch generally a higher level of pornography, more extreme pornography, some of that is violent pornography. The Supreme Court of Canada cited our research and other research in the famous Butler case to change the law. In fact, it said the weight of the evidence is sufficient to show that violent pornography does have kinds of effects that Canadians should be concerned about in terms of attitudes about women and the potential, at least, for violence against women.
On April 4th, 2017. See this statement in context.