Does ACT actually work for porn? The trial, explained.

Most advice about quitting porn has no evidence behind it at all. Cold showers, streak counters, semen retention, rubber bands on the wrist — none of it has been through a trial. One approach has.

What the study actually did

Jesse Crosby and Michael Twohig at Utah State University randomised 28 adult men with problematic internet pornography use into either twelve weekly sessions of ACT or a waitlist. Viewing was self-reported and tracked throughout.

Results at post-treatment and follow-up:

• 93% average reduction in viewing (waitlist: 21%)
• 86% of that reduction still held at three months
• 35% of participants stopped viewing entirely
• 74% achieved a reduction of 70% or more

An earlier pilot by the same researchers (Twohig & Crosby, 2010) found an 85% reduction — but that one had six participants and no control group. It is a pilot, not evidence, and it gets cited as though it were the main result surprisingly often. The 2016 randomised trial is the one that counts.

What it doesn’t prove

This matters more than the headline number, and almost nobody selling you an app will say it:

• 28 people is small. It’s a real RCT, but it is not a large one, and it has not been replicated at scale.
• All men, all adults, self-selected. They volunteered for treatment. That is not the general population.
• Self-reported viewing. There is no objective meter. People under-report.
• Twelve sessions with a human therapist is not the same intervention as an app. An app that teaches the same skills is a reasonable bet — it is not the thing that was tested.

We build an ACT-based app, so we have an obvious interest in this study looking good. That’s exactly why the limitations belong in the same breath as the number. The honest claim is: ACT has the best trial evidence available here, and the evidence base is still thin. Anyone telling you it’s settled is selling.

Why ACT works differently to willpower

Most approaches treat the urge as an enemy to be defeated — block it, outlast it, count the days you survived it. ACT starts somewhere else:

The urge isn’t the problem. Fighting it is what hands it power.

The technical term is experiential avoidance — the effort to not-have an unwanted internal experience. The more energy you spend not-thinking about something, the more of your attention it owns. ACT’s move is to stop the fight, make room for the urge, and act on your values while it’s still there.

That resolves into a few concrete skills:

• Grounding — coming back to the present when the moment spins up. Dropping anchor.
• Defusion — stepping back from a thought so it stops being the only thing in the room. Leaves on a stream.
• Acceptance — letting an urge rise and fall without acting. Urge surfing.
• Values — knowing what you’re doing this for, in your own words, and moving toward it. The choice point.

A note on the word “addiction”

Worth knowing, because the internet is confident and the science isn’t: the WHO’s ICD-11 recognises Compulsive Sexual Behaviour Disorder as an impulse-control disorder — not an addiction. The DSM-5-TR doesn’t include it at all. Estimates of problematic use land somewhere between 3.2% and 16.6% depending on how you define it.

Which is a useful thing to hold when a forum tells you your brain is “fried” and needs 90 days to “reboot”. That timeline is not a finding. It’s a folk model. ACT doesn’t need it to be true — the skills work on the urge in front of you tonight, whatever the label turns out to be.

Where WithAnchor fits

WithAnchor takes the six core ACT practices out of the therapy room and puts them in the moment the urge actually hits — with no streak to lose and nothing that resets when you slip. It is not therapy, and it is not the twelve-session protocol that was trialled. It’s the skills, in your pocket, at 2am.