09/22/2026
The Leak in the Back Bedroom
A homeowner calls a contractor about a stain on the bedroom ceiling. The contractor listens carefully and comes to understand what the stain means to the person living under it. A skilled therapist develops the same kind of experiential understanding of a client: what an experience meant, how it felt, and why the client's response made sense. That understanding is essential, and it describes the problem without yet explaining it.
The contractor repaints, recommends a dehumidifier, and seals the upstairs grout. Each repair is competent, just as coping skills, psychoeducation, or processing past events can each be done well in therapy. But no one has said which cause each repair is supposed to address, and the stain keeps coming back.
A second contractor looks for what the episodes have in common. The stains appear only after storms from the east, within a day of the rain. She concludes that wind-driven rain is getting in where the flashing around the chimney has lifted. This is a formulation: an explicit, provisional account of the process that produces and maintains a problem, including the conditions under which it appears and what keeps it recurring.
Her formulation also predicts what should happen. If she replaces the flashing, the next storm from the east should leave the ceiling dry, and if it does not, she was wrong and will look elsewhere. A clinical formulation works the same way. The clinician states what is maintaining the difficulty, what should change if the approach is correct, and what observations would require reconsideration.
The first contractor committed to no explanation, so she can blame each return of the stain on drying time. A clinician without a formulation can likewise put a lack of change down to the client needing more time or more trust, and that clinician's own understanding never gets tested.
Clients are owed what the homeowner was owed: an explanation someone is willing to be wrong about.
Read the full position paper, The Missing Formulation: Clinical Reasoning and the Accountability of Therapeutic Work: Link in comments.
