Louise Kadayer told Premier's News Hour that she believes watching pornography just once can cause permanent brain damage in young males.
Ms Kadayer said: "We've got research studies, very clear causal research studies which shows that young boys, just a one off exposure to pornography; to this kind of explicit material, just a one of exposure can actually cause permanent change in neuron functions."
Speaking before the Commons justice select committee, the Lord Chief Justice said he had "no doubt at all" violent internet porn "had a dramatic effect" on crimes.
Lord Thomas mentioned the murder of Georgia Williams, a teen lured to her death by "sexual deviant" Jamie Reynolds.
He sat on an appeal last year which ruled Reynolds, 23, would never be freed.
He said: "I cannot believe someone would have thought through how to do something without having read it. What is available to download and see is simply horrific and it played a real part in the way this murder was carried out."
The judge at Reynolds' trial ruled some evidence in the case will never be revealed as it could cause "untold distress".
Reynolds photographed himself hanging Georgia, aged 17, after planning the killing in a horror fantasy story on his iPhone.
Following pressure from the UK government, several of the UK's biggest ISPs have implemented new ways of blocking pornography.
Prime Minister David Cameron had said that the ISPs needed to act to prevent children from "stumbling across hard-core legal pornography".
Sky rolled out its filters in November. New subscribers have to opt out of its Broadband Shield default setting if they want to see adult content.
In December, BT announced its version, which is automatically set to be on for new customers.
Critics argue that the porn filters used are too sweeping and end up blocking too many legitimate sites.
Sky rolled out its filters in November. New subscribers have to opt out of its Broadband Shield default setting if they want to see adult content.
In December, BT announced its version, which is automatically set to be on for new customers.
Critics argue that the porn filters used are too sweeping and end up blocking too many legitimate sites.
Louise Kadayer, Christian psychologist:
