There is some research that suggests pedophilia is linked to lower IQ, such as http://sax.sagepub.com/content/19/3/285 http://sax.sagepub.com/content/19/3/285.

There is some research that suggests pedophilia is linked to lower IQ, such as http://sax.sagepub.com/content/19/3/285 http://sax.sagepub.com/content/19/3/285. But as with most research on people with this condition, subjects are picked from the prison population and/or from psychiatric patients.