From their findings, it looks like in 2010, an internet filter helped. But with this generation of kids that have the internet in their back pockets, that’s no longer the case.
These researchers went into the study with the hypothesis that having an internet filter would still have a high protective effect, and were surprised to find their predictions were very wrong.
“We did not find confirmatory evidence that filters were effective for seeing nudity, private parts, people having sex, or any of the four types in line with our preregistered hypotheses. In fact, contrary to our predictions we found evidence in the direction opposite to what we hypothesized in one case: households reporting using filters were more, not less, likely to have an adolescent who reported having seen violent pornography in the past 6 months.”