TL;DR

Candidates who deliver a textbook Mental State Examination still lose marks in psychiatric OSCE stations. The reason isn’t poor observation — it’s missing synthesis. The psychiatric formulation framework turns descriptive data into clinical reasoning. This article explains how to use this 4P framework, when to deliver it, and the three mistakes that cost candidates marks.

The MSE is the data. It isn’t the answer.

By the time most candidates reach the psychiatric OSCE station, they can deliver a textbook Mental State Examination on autopilot. They review appearance, behaviour, speech, mood, affect, thought form, thought content, perception, cognition, insight, and judgement. Consequently, they walk in, deliver the structure, and walk out feeling competent.

They feel competent because they were thorough. However, the examiner mark sheet rewards something different. A thorough MSE alone sits in the middle of the mark range without a synthesis explaining the clinical picture. Candidates who pass with confidence use the MSE as data, then deliver a formulation as the answer.

This shift from describing to formulating is the move that wins marks. It is also a move that most mentors never explicitly teach candidates.

What is a psychiatric formulation?

A formulation is a hypothesis. It is your best-supported clinical explanation for why this person has presented with this picture at this moment. It is rooted in Engel’s biopsychosocial model. Furthermore, the Australian work of Patrick McGorry and colleagues on clinical staging developed it even further.

It is not a diagnosis — diagnosis answers what. Formulation answers why now, and that is what the examiner wants to hear.

Most psychiatric textbooks teach three components: predisposing, precipitating and perpetuating factors. However, the modern psychiatric formulation framework adds a fourth element: protective factors. The fourth P matters because risk and management both hang on it. If you don’t state what is keeping this person safe, you lose both communication and management marks.

The 4Ps unpacked

Predisposing factors make a person vulnerable to a psychiatric presentation in the first place. These elements are biographical and biological. They include a family history of affective or psychotic disorders, childhood adversity, and attachment disruption. Personality traits, chronic medical illness, perinatal complications, intellectual disability, and baseline substance use also predispose patients.

Precipitating factors trigger the current episode within a recent week or month. They are recent and proximate. Examples include bereavement, relationship breakdown, job loss, or illness in a loved one. Other triggers include a medication change, substance abstinence, major anniversaries, recent moves, financial shocks, or injuries.

Perpetuating factors maintain the ongoing episode. They are current and continuous. Examples include active substance use, social withdrawal, relationship conflict, and financial stress. Sleep deprivation, medication non-adherence, untreated medical comorbidity, unsafe living environments, or ongoing situational stressors also perpetuate issues.

Protective factors keep the person safe and well — even as they sit before you struggling. They include a supportive family or partner, stable employment, and a faith or spiritual community. Prior recovery from a similar episode, treatment engagement, insight, lack of command hallucinations, plans, or means also protect them.

You will note that the framework does two jobs at once. It generates a clinical narrative for the diagnosis while completing your risk assessment without a separate paragraph. This clear efficiency is why it works perfectly in a 7-minute station.

A worked example — late-onset depression

THE CASE

Mr Anderson, 67, is a retired engineer. His wife of forty years died eight months ago. He has been drinking four to six standard drinks each evening since the funeral. He lives alone. He has no prior psychiatric history. He has attended the same church every Sunday for forty years. His two adult daughters phone him each week.

YOUR MSE

He is dishevelled with poor self-care. Speech is slow and quiet. Mood is depressed, affect sad and congruent. Thought form is slow but linear. Thought content is dominated by guilt and worthlessness — “I should have noticed she was sick earlier”. No perceptual disturbance. MMSE 28 of 30. Insight is partial. Judgement is fair.

That is the data. Now the formulation, delivered as one continuous clinical thought:

“Mr Anderson is a 67-year-old retired engineer presenting with an eight-month history of a depressive episode. On a biopsychosocial formulation, his older age and recent retirement predispose him by stripping his identity structure. The precipitating event is the bereavement of his wife of forty years. Harmful alcohol use, social withdrawal, and isolated living perpetuate this episode.

His protective factors are significant. These include a long-standing church community, weekly contact with two daughters, intact cognition, and fair insight. My clinical impression is a moderate bereavement-precipitated depressive episode complicated by harmful alcohol use.

Risk is currently moderate but not high — there is no active plan, no means, and he has present-future orientation. My management priorities include antidepressant initiation and alcohol use disorder counselling with consideration of pharmacotherapy. Additionally, I will establish a structured re-engagement plan with his church community and daughters.”

Notice that you have answered what, why now, what is keeping it going, what is keeping him safe, and what you will do about it — in under sixty seconds.

How to deliver the formulation in 60 seconds

Stop and gather the MSE data first. Do not formulate to fill a gap. Then move into the formulation with a single transitional sentence: “On a biopsychosocial formulation…”

Run the four Ps in order: predisposing, precipitating, perpetuating, and protective. Dedicate one sentence to each factor. Close with three clear statements: clinical impression, risk level with rationale, and three management priorities.

The rhythm is: data → transition → 4P → impression → risk → plan. Practise it out loud. The minute you can deliver it as a single continuous clinical thought, the station opens up.

The three mistakes I see in every coaching session

Mistake one: listing problems instead of formulating.

“He’s depressed and alcoholic and lonely” is basic description. Conversely, explaining how his alcohol use perpetuates his depressed mood and prevents community engagement is a true formulation. The difference lies in whether the factors link to each other or just stack up.

Mistake two: skipping the protective factors.

Candidates run out of time and drop the fourth P. Naturally, examiners notice this omission immediately. The protective factors do two things at once. They tell the examiner you have completed a risk assessment, and they show the patient you recognise their resources. Without them, you lose both communication marks and management marks.

Mistake three: formulating before the MSE is complete.

When you formulate too early, you formulate to a gap and your hypothesis runs ahead of your data. Examiners hear this mismatch instantly. Therefore, stop, complete the MSE structure, gather every observation, and then synthesise. The order matters completely.

What this means for your preparation

If you are preparing for any psychiatric OSCE station, the next thing to drill is not another MSE structure. Instead, focus entirely on the 4P formulation. Take five of your usual case scenarios, such as a major depressive episode, post-partum depression, or first-episode psychosis.

Write out the 4P formulation for each scenario in under sixty seconds. Afterwards, deliver them aloud. Then film yourself to review your performance. The framework becomes completely automatic after about twelve repetitions.

We have built a free video walking through the 4P framework on the Oyamed YouTube channel. For deeper preparation across all psychiatric counselling and OSCE stations, use our Top 50 Counselling Stations Vault. It includes a fully-worked formulation for every Tier B psychiatric case, along with examiner-eye pearls.

The MSE is the data. The 4P is the answer. Make the move from one to the other, and the marks follow.

Dr Vinu Verghis is a Brisbane-based AMC coach and University OSCE Examiner. Oyamed coaches international medical graduates through clinical OSCE preparation using current Australian guidelines and the foundational psychiatric formulation literature (Engel, McGorry, RANZCP). Book a diagnostic consultation at oyamed.com.

Sources & further reading:

• Engel GL. The need for a new medical model. Science 1977.

• McGorry PD et al. Clinical staging in psychiatry. Aust N Z J Psychiatry.

• RANZCP Clinical Practice Guidelines for Mood Disorders (current edition).

• Sims’ Symptoms in the Mind (psychiatric phenomenology).