Psych · Professional — clinical skills
Formulation: biopsychosocial and 4Ps
Also known as Case formulation · Biopsychosocial formulation · 4P formulation · 5P formulation · Clinical formulation · Case conceptualisation · Cultural formulation · Multiperspective formulation
Exam-exhaustive fellowship reference on psychiatric case formulation — biopsychosocial model, 4Ps (predisposing, precipitating, perpetuating, protective), BPS×4P matrix, multiperspective and CBT/psychodynamic conceptualisations, DSM cultural formulation and CFI, worked examples, and CASC/viva technique linking formulation to a treatment plan. FRANZCP-primary, globally tagged.
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Red flags
- Presenting a diagnosis restated as a formulation — examiners expect mechanisms, not a label replay
- BPS laundry list without causal links or treatment implications
- Omitting protective factors (deficit-only narrative that collapses hope and planning)
- Cultural blindness or cultural essentialism — both fail cultural formulation standards
- Elegant formulation delaying medical stabilisation or immediate risk management
- Blaming language about the person or family dressed up as 'formulation'
Meet the patient
A 19-year-old apprentice is admitted with six weeks of persecutory delusions, auditory hallucinations, and functional collapse. He smokes high-potency cannabis daily, slept four hours a night through his exams, and his older sister — the only person he still talks to — says he has been "different" since he was fourteen.[6]
Two registrars write two notes. The first says "schizophrenia, start antipsychotic." The second says the same diagnosis, then explains why this person, why now, what keeps it going, what protects him, and what we do first — and links every intervention to a factor. The examiner, and the patient, only remember the second note.[6][7]
References18ShowHide
- [1]Engel GL The need for a new medical model: a challenge for biomedicine Science, 1977.PMID 847460
- [2]Engel GL The clinical application of the biopsychosocial model Am J Psychiatry, 1980.PMID 7369396
- [3]Borrell-Carrió F, Suchman AL, Epstein RM The biopsychosocial model 25 years later: principles, practice, and scientific inquiry Ann Fam Med, 2004.PMID 15576544
- [4]Ghaemi SN The rise and fall of the biopsychosocial model Br J Psychiatry, 2009.PMID 19567886
- [5]Weerasekera P Formulation: a multiperspective model Can J Psychiatry, 1993.PMID 8348476
- [6]Macneil CA, Hasty MK, Conus P, et al. Is diagnosis enough to guide interventions in mental health? Using case formulation in clinical practice BMC Med, 2012.PMID 23016556
- [7]Owen G What is formulation in psychiatry? Psychol Med, 2023.PMID 36878884
- [8]Eells TD The role of case formulation in the current practice of psychotherapy World Psychiatry, 2025.PMID 40948051
- [9]Eells TD, Lombart KG, Salsman N, et al. Expert reasoning in psychotherapy case formulation Psychother Res, 2011.PMID 21240834
- [10]Kuyken W, Beshai S, Dudley R, et al. Assessing Competence in Collaborative Case Conceptualization: Development and Preliminary Psychometric Properties of the Collaborative Case Conceptualization Rating Scale Behav Cogn Psychother, 2016.PMID 25629820
- [11]Persons JB, Roberts NA, Zalecki CA, et al. Naturalistic outcome of case formulation-driven cognitive-behavior therapy for anxious depressed outpatients Behav Res Ther, 2006.PMID 16209865
- [12]Lewis-Fernández R, Aggarwal NK, Bäärnhielm S, et al. Culture and psychiatric evaluation: operationalizing cultural formulation for DSM-5 Psychiatry, 2014.PMID 24865197
- [13]Lewis-Fernández R, Aggarwal NK, Lam PC, et al. Feasibility, acceptability and clinical utility of the Cultural Formulation Interview: mixed-methods results from the DSM-5 international field trial Br J Psychiatry, 2017.PMID 28104738
- [14]Lewis-Fernández R, Aggarwal NK, Kirmayer LJ The Cultural Formulation Interview: Progress to date and future directions Transcult Psychiatry, 2020.PMID 32838656
- [15]Aggarwal NK, Chen D, Lewis-Fernández R Eliciting social stressors, supports, and determinants of health through the DSM-5 cultural formulation interview Front Psychiatry, 2023.PMID 37056400
- [16]Newman LK Psychodynamic formulation in the era of the brain - towards integration Australas Psychiatry, 2017.PMID 28486814
- [17]Weiss MG, Deshmukh A, Sarmukaddam SB, et al. Sociocultural Framework for Psychiatric Case Formulation J Nerv Ment Dis, 2024.PMID 37874984
- [18]Krishan Aggarwal N, Chen D, Lewis-Fernández R If You Don't Ask, They Don't Tell: The Cultural Formulation Interview and Patient Perceptions of the Clinical Relationship Am J Psychother, 2022.PMID 35430870