CBT Case Formulation

A CBT case formulation is a personalised map of how a particular person's difficulties developed and are being maintained — it's the therapist's (or client's) working theory of what's going on and why.

Rather than just listing symptoms or slapping on a diagnosis, a formulation tries to tell a coherent story that connects a person's early experiences, the core beliefs those experiences produced, the assumptions and rules for living that grew out of those beliefs, and the specific thoughts, feelings, behaviours, and physical responses that show up in their day-to-day life now.

It draws on established CBT models but is always tailored to the individual — two people with identical diagnoses might have very different formulations because their histories, beliefs, and maintaining cycles are different.

The formulation typically has two dimensions: a longitudinal strand, which looks back at predisposing factors (childhood experiences, attachment patterns, early messages received about self and world) and asks "how did this person come to be vulnerable in this way?", and a cross-sectional strand, which looks at the present and asks "what is keeping this problem going right now?" The cross-sectional piece usually maps the vicious cycles — the way a person's thoughts trigger emotions, which drive behaviours, which produce consequences that confirm the original thought and keep the whole loop spinning.

You don't need to be in therapy to begin mapping your own patterns. However, the best formulations tend to be collaborative, meaning therapist and client build it together, and it's also provisional — it gets revised as therapy progresses and new information emerges. Its purpose is both explanatory and practical: it helps the client feel understood, and it points directly toward what needs to change and how.