A patient tells you that her deceased grandmother still visits her in dreams. Another believes that unseen spiritual forces influence his health. A third insists the government has implanted a device that broadcasts his thoughts.
Which patient is psychotic? The answer is that you don’t know. At least not yet.
One of the most common misconceptions about psychiatry is that delusions are simply “false beliefs.” In reality, experienced clinicians rarely diagnose psychosis based on what a patient believes alone. Instead, they ask a different question: How did this belief develop, how is it held, and what effect is it having on the person’s life?
That distinction matters because psychiatry occupies a unique place in medicine. Unlike diagnosing pneumonia or diabetes, we are often asked to evaluate experiences that cannot be confirmed or disproven with laboratory tests or imaging. We work in the gray space between subjective experience and observable behavior.
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The greatest diagnostic error may not be misidentifying an unusual belief as psychosis. It may be believing that unusual content alone is enough to make the diagnosis.
Beliefs don’t exist in isolation
People hold extraordinary beliefs for many reasons:
- Religious traditions include miracles, divine communication, angels, reincarnation, ancestor visitation, and spiritual healing.
- Cultures around the world explain illness, suffering, and recovery through different spiritual and philosophical frameworks.
- Many people believe conspiracy theories, pseudoscience, or misinformation that others would consider obviously false.
None of these beliefs automatically indicate a psychiatric disorder. Likewise, a patient with schizophrenia can express beliefs that sound entirely ordinary. The difference often lies not in the content but in the process:
- When did the belief begin?
- Can the patient consider uncertainty?
- Did it emerge alongside hallucinations, mania, cognitive changes, or severe functional decline?
- Has it become the organizing principle of the person’s life?
These questions are usually far more informative than whether the belief itself sounds unusual.
Culture complicates the picture
The DSM-5 acknowledges that clinicians must consider cultural and religious context before diagnosing a delusion. A belief that appears bizarre to one clinician may be widely understood within the patient’s faith tradition, family, or community.
Culture is also much broader than race or religion. It includes military service, immigration, professional identity, regional customs, disability communities, and increasingly, online communities that shape how people interpret their experiences.
This doesn’t mean every culturally framed belief is healthy, nor does it mean every unusual belief reflects psychosis. It means clinicians must avoid two equally important mistakes: The first is pathologizing culturally meaningful experiences simply because they are unfamiliar. The second is overlooking psychosis because its language sounds culturally acceptable.
The Cultural Formulation Interview is an underused tool
One of the most valuable resources in the DSM-5 is also one of its least discussed: the Cultural Formulation Interview. Rather than asking clinicians to become experts in every culture, it encourages us to ask better questions:
- How does the patient understand what is happening?
- How do family members or trusted community members understand it?
- What does this experience mean to the patient?
- What kind of help makes sense within their worldview?
These conversations often reveal information that a standard symptom checklist cannot.
Curiosity is a clinical skill
Several years ago, I realized I was asking myself the wrong question during difficult psychiatric evaluations. Instead of wondering, “Is this belief true?” I began asking, “What experience is this belief trying to explain?” That small shift changed the way I approached patients. It slowed me down. It made me more curious. And, I believe, it made me a better clinician.
Our job is not to determine whether God speaks to people, whether miracles occur, or whether every extraordinary claim is objectively true or false. Our responsibility is to determine whether a person’s thinking reflects a psychiatric disorder, whether they are suffering, whether they can function, and whether they or others are at risk. Those are different questions.
Diagnostic humility is not diagnostic indecision
None of this suggests that clinicians should hesitate to diagnose psychosis when the evidence supports it. A patient who is responding to command hallucinations, unable to consider alternative explanations, profoundly disorganized, and placing themselves or others at risk requires prompt assessment and treatment. Cultural humility is not an argument against diagnosis. It is an argument against premature certainty.
Psychiatry asks us to hold two possibilities in mind at the same time: that an unusual belief may reflect a culturally meaningful experience, or that it may reflect a serious mental illness. Good clinicians resist the temptation to choose between those possibilities too quickly. They gather more information. They ask better questions. They remain curious.
In an era of increasing cultural diversity, rapidly changing technology, and growing mistrust of institutions, that curiosity is not simply good bedside manner. It is good diagnostic medicine.
Stacy Stojakovic is a physician assistant.
