Most therapies have a story about why we get stuck. Cognitive Analytic Therapy — CAT — has a particularly useful one: that a lot of what keeps us in difficulty isn’t a single faulty thought or a bad habit, but a pattern — a way of relating to ourselves and to other people that we learned early, that made sense once, and that now runs on its own.

This is a plain-English guide to what CAT is, how it works, and what actually happens in a course of it.

A therapy of patterns

CAT starts from a simple observation: the way we treat ourselves is usually a version of how we were once treated. If you grew up having to earn approval, you may now drive yourself relentlessly and feel like a failure the moment you stop. CAT would call that a reciprocal role — for example, demanding-to-striving-but-never-enough. We move between both ends of these roles, sometimes the critic and sometimes the criticised, and we tend to pull other people into the other end too.

These patterns aren’t character flaws. They were adaptations — the best available way of coping at the time. The trouble is they outlast the situation that created them, and they repeat: the same kind of relationship, the same dead end, the same quiet feeling of here I am again.

The reformulation letter

The first real piece of work in CAT is unusual, and it’s the part most people remember. Early on — often around the fourth session — I write you a reformulation letter.

It is what it sounds like: a letter, addressed to you, that tells the story of how you came to be where you are. It draws together what you’ve described — your history, the patterns you keep hitting, the feelings underneath — into a single account, in plain language, written to you rather than about you.

People often describe receiving it as the moment something turns. To see your life set out as a coherent story — not a list of failings, but a pattern that makes sense given what you’ve lived — can be the first time the difficulty stops feeling like proof that something is wrong with you. I write one for every CAT client, and we revise it together until it reads true.

The map

Alongside the letter, we draw the patterns out — literally, on paper. CAT calls this a diagram (the formal name is a sequential diagrammatic reformulation, but no one needs that phrase to use it). It’s a map of your specific loops: the trigger, the feeling, the thing you do to cope, and how that move quietly keeps the loop turning.

The point of the map isn’t insight for its own sake. It’s so you can recognise the pattern while it’s happening — to catch yourself mid-loop, where, for the first time, a different choice becomes possible.

Exits

Those different choices are what CAT calls exits — the points on the map where you can step out of the loop instead of round it again. Recognising a pattern is the start; practising the exits, over and over, is how it actually changes. Much of the middle and later part of a course is exactly that: spotting the old move, and rehearsing a new one until it becomes available without effort.

What a course looks like

CAT is collaborative and time-limited — usually around 16 to 24 sessions — and it has a clear shape:

Reformulation — the early sessions: understanding the patterns, the letter, the diagram.
Recognition — learning to spot the patterns as they happen in daily life.
Revision — practising the exits, and changing the patterns.

It also ends deliberately. Near the close, both of us write a goodbye letter — an honest account of what the work did and didn’t do, what’s changed, and what to keep an eye on. CAT takes endings seriously, because for many people endings are exactly where the patterns show up.

Who CAT helps

CAT tends to fit when the difficulty is relational or recurring — when the same problems repeat across relationships and time, when it’s bound up with how you treat yourself, or when previous help worked on the surface but the underlying pattern stayed put. It’s used across anxiety, depression, trauma, and relationship difficulties, and it’s particularly suited to the I keep ending up here kind of stuckness.

That doesn’t make it the right tool for everything. For a specific, present-day problem held in place by a current cycle — a phobia, a recent low patch — CBT is often the more direct route. There’s a separate guide on CBT vs CAT if you’re weighing the two up.

How to start

If any of this sounds like the shape of your own difficulty, the way in is a short conversation — a free 15-minute call to say what you’re bringing and hear how I’d work with it, with no obligation. CAT is one of the two therapies I’m accredited in, and for the patterns that don’t shift on their own, it’s often exactly the right one.