Chapter 3: Diagnosis, Formulation, and Assessment

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Welcome to the Deep Dive.

Today we're tackling a challenge that pretty much every mental health student runs into.

How do you navigate the really complex world of psychopathology?

How do you cut through all the jargon, understand the big debates and, you know, grasp the real world impact on clients?

Well, that's exactly our mission today.

We're doing a deep dive into diagnosis, formulation and assessment, really the foundational tools for mental health pros.

I've got a stack of great sources, including a key chapter from psychopathology and mental distress, and our goal is simple.

Give you a shortcut to being truly well informed, maybe with some surprising facts and crucial real world relevance baked in.

Yeah, absolutely.

And what's fascinating is that these are just, you know, dry academic concepts.

They're the very lens we use to upstand and respond to human suffering.

So this deep dive, it's going to guide you through how we define problems, how we think about their causes and how we gather the info we need to actually help.

And to make this really concrete, we'll follow Jill.

She's a 20 year old medical student struggling with anxiety, a real lack of motivation for her studies, plus physical stuff like stomach ache, shortness of breath.

She feels tense, a bit sad, kind of helpless.

And a big part of this seems to be family pressure.

Her parents really pushed her into medicine.

She had to give up ballet, which she loved.

So Jill's situation, it'll be our running case study, shows how these ideas actually translate into practice.

Okay, so let's start with diagnosis itself.

The word, it's interesting, it comes from ancient Greek idea, meaning through and gignos gain to know.

So diagnosis basically means to know thoroughly or discern.

But what's kind of wild is how it gets used in two main ways in mental health.

First, you've got the medical sense, right?

Trying to identify a diseased condition, like a doctor diagnosing flu.

For Jill, this might mean diagnosing generalized anxiety disorder or GAD.

But then there's this other non -medical way, just seeking the cause or nature of a problem.

So for Jill, maybe her difficulty is about failing to self actualize, or maybe it's just a lack of social support.

And you can imagine these two different ways of looking at it, they lead to really contrasting approaches in practice.

Exactly.

And when we talk about those medical models, the big players are the DSM, the Diagnostic and Statistical Manual of Mental Disorders, and the ICD, specifically the mental health section of the International Classification of Diseases.

People often call these psychiatric diagnoses because, well, psychiatrists were key in developing them, although pretty much all mental health pros use them now.

They both work on a kind of medical model, using what's called categorical diagnosis, basically grouping symptoms into these distinct disorder boxes.

And crucially, they rely on descriptive psychopathology.

That means diagnosis is based on what you can see,

observable behaviors,

not the underlying causes, the etiology, which honestly, for most mental disorders, we just don't fully know yet.

For students in the US, understanding these is non -negotiable, especially when it comes to health insurance.

Yeah, that insurance piece is huge.

And it's good to know who's behind these manuals.

The ICD is truly global.

It's put out by the World Health Organization.

Part of the UN.

Right, part of the UN.

It covers all internationally recognized health problems used in 194 countries.

Mental health pros usually focus on that specific section for mental behavioral and neurodevelopmental disorders.

And the latest version, ICD -11, which came into effect in 2022, is actually free and online.

That's a big deal.

Its roots go way back, even before the WHO, to 1893.

The DSM, though, that's an American publication from the American Psychiatric Association.

But it's often seen as the global standard, especially for research.

Unlike the ICD, you have to buy the DSM.

The current one, DSM -5TR, costs around a couple hundred bucks.

Its modern form really clicked into place with DSM -3 back in 1980.

That was the game changer, introducing specific criteria and codes.

Before that, it was much simpler, going back to the

which had just one category, idiocy.

It's kind of mind -blowing to think the DSM now has 542 diagnoses.

And that number itself sparks a huge debate, doesn't it?

Are we getting better at identifying conditions, or are we, like some critics worry, maybe medicalizing everyday life?

That's a really critical question.

And interestingly, both ICD -11 and DSM -5TR define mental disorders in almost identical ways, a clinically significant disturbance that reflects a dysfunction.

You get the idea.

So they agree on the what, but they differ on the how.

ICD uses diagnostic guidelines.

They're broader, give clinicians more wiggle room, focusing on essential features.

DSM uses diagnostic criteria, much stricter, precise symptom counts, specific durations needed.

You can see how this plays out right.

An ICD clinician might have more flexibility than a DSM user looking at the exact same person.

Take Jill's gay day.

DSM might need, say, three specific symptoms for six months.

ICD -11 might just say several months, more days than not, a bit looser.

Both systems use diagnostic codes, those alphanumeric keys like F41 .1 or 6A70 for gay day.

They actually started with the ICD, but are essential in the DSM world too, especially for billing and records in the US.

Okay, so we have these systems, but how good are they?

This brings us to reliability and validity.

And the stakes here are incredibly high.

Reliability first.

Does the measure give similar results each time?

We're especially interested in inter -rater reliability.

Do different clinicians reach the same diagnosis for the same person?

I mean, think about it.

If one psychologist says Jill has GAD, another says bipolar, a third says narcissistic personality.

That's just taos, right?

Leads to confusion, potentially the wrong treatment.

Now, DSM -3 did make big strides in improving reliability.

And some categories today, like PTSD, schizophrenia, bipolar, they generally have good

but others, even really common ones like major depression or GAD, only mediocre reliability.

So inconsistency is still a real worry.

So that's consistency reliability.

But then there's validity.

Does the diagnosis actually measure what it's supposed to measure?

And this is where things get really tricky.

Validity covers a lot.

Does it look right?

Does it predict outcomes?

Does it reflect some underlying truth?

But here's the kicker.

Validity for mental disorders has been super elusive because, well, we still don't fully agree on what a mental disorder is, fundamentally.

Back in 1970, Robbins and Gaze lead out these aspirational criteria, precise descriptions, biological tests, ways to distinguish disorders, but DSM and ICD.

They still fall short, especially on the biological test front.

We just don't have them for most things.

Plus, you've got comorbidity.

People often meet criteria for multiple diagnoses at once.

That blurs the lines and makes validating distinct disorders really, really hard.

Yeah, that validity challenge is massive.

And it brings us to, well, a really controversial piece of history that's gotten even messier recently.

David Rosenhand's 1973 pseudo -patient study.

You probably know it.

Eight supposedly sane people faked hearing voices to get into psychiatric hospitals.

All got admitted, none were spotted as fakes.

For decades it was exhibit A for the idea that professionals couldn't tell sane from insane.

But then, get this, in 2019 it came out that Rosenhand basically faked a lot of his data.

Pseudo -patient identities, misrepresenting

like leaving out positive staff interactions one patient had.

It's a huge ethical breach.

But it raises this difficult question.

Even with the fraud, does Rosenhand's basic point that diagnosability is really challenging still have some weight?

It forces us to grapple with those persistent difficulties, even while acknowledging the study itself was deeply flawed.

Wow, that Rosenhand revelation is stunning.

I remember learning about that study.

It really changes things.

It definitely highlights how careful we need to be with research claims.

So, okay, given all this complexity, the history, the reliability issues, the validity questions, what are the pros and cons of DSM and ICD overall?

Well, on the plus side, they give professionals a common language that's vital for communication and research.

They also help clients access treatment, especially through insurance.

They've helped advance scientific understanding, standardizing things.

And for some patients, actually getting a diagnosis, having a name for their struggles can be validating and reduce stigma.

But the downsides are pretty significant too.

We've got those ongoing reliability and validity problems like the comorbidity issue.

Critics argue they medicalize normal problems like turning temper tantrums into intermittent explosive disorder.

There's also criticism that diagnostic thresholds have been lowered for some disorders, maybe pathologizing things that are just part of the human condition.

And this might link to increased reliance on medication.

Plus, they're still mostly descriptive.

They don't tell us the and some argue they rely too much on consensus, maybe even politics rather than pure science, and can feel culturally biased.

So for you as students, your learning tools that are incredibly useful, yes, but also really deeply debated.

It's a lot to hold.

And that cultural piece is huge.

It leads right into the controversial question.

Are DSM and ICD culture bound?

This idea of culture bias is a really hot topic.

DSM5TR tries to address this with a cultural formulation interview, the CFI.

It's set of questions to help clinicians ask about cultural identity, explanations of distress, coping styles, help seeking.

But many argue it's not nearly enough.

They point to culture bound syndromes like that syndrome in South Asia, or brainfag in West Africa, ways of expressing distress that just don't fit neatly into these my CD boxes.

The core criticism is that these systems are fundamentally Eurocentric, maybe even culturally imperious, not just when used elsewhere, but even for people from different backgrounds living in Western societies.

There are alternatives, like the African centered is ebonylology too, so that's had its own criticisms too.

It really pushes us to ask, how do we balance culturally sensitive approaches with potentially universal aspects of distress without letting bias creep in from any single cultural viewpoint?

Yeah, that's a tough balancing egg.

Looking ahead, what are the trends for DSM and ICD?

Well, there seems to be a slow shift towards more dimensional diagnosis mapping severity on a spectrum, not just yes no categories.

You see this with autism, substance use, and ICD has already done it for personality disorders.

The dream of finding biological markers, biomarkers, for diagnosis is still alive, but honestly it remains aspirational.

We're not there yet for mental disorders.

There's also talk about the ICD gaining more ground in the US.

There's a government mandate for its codes, it's free, and it's getting more aligned with DSM.

Though actually switching everyone over to ICD 11 might take a while.

Clinicians might stick with the older ICD 10 for a bit, but despite all the debate, let's be real, these manuals still hold enormous influence.

Okay, so that's the landscape of the dominant systems, but what about alternatives?

Mental health pros have come up with some really different ways of thinking about distress.

Let's dive into a few.

Yeah, definitely.

Take the psychodynamic diagnostic manual, the PDM -2.

It's explicitly psychodynamic, so it's built on a specific theory, unlike the descriptive December's Haiti.

Its real aim is to map the client's internal world, their personality structure, how their mind functions, their subjective experience.

It's trying to capture the person, not just the symptoms.

It uses three axes.

The P axis looks at personality syndromes, levels of functioning, specific styles like depressive or narcissistic.

For Jill, maybe she'd be seen as a higher functioning borderline level, with anxious avoidant traits.

Then the M axis assesses mental functioning things like identity, relationships, coping mechanisms.

Jill might show some issues here, perhaps with self -esteem.

And the S axis looks at the subjective experience of common symptom patterns, what it feels like.

For Jill, it might describe her adjustment issues in psychodynamic terms.

People praise PDM for its depth.

The critics say it's maybe too complex, too long, which might hinder its use.

Interesting.

Okay, next up, the research domain criteria, or RDOC.

This is a big initiative from the U .S.

National Institute of Mental Health, NIMH, their goal.

To eventually build a diagnostic system based on biology, on biomarkers, the idea is that mental illnesses are brain circuit disorders, and we can find biosignatures to identify them.

RDOC works with six broad domains of functioning, like negative valence, cognitive systems, social processes.

And here's something that really jumped out at me from the sources.

RDOH isn't funding studies based only on DS, MS, ED categories anymore.

That's a very much a research initiative.

It's not something clinicians are using day to day for diagnosis yet.

Right.

Then there's the hierarchical taxonomy of psychopathology, or HITOP.

This one directly tackles the comorbidity problem in DS, myCD, the fact that diagnoses overlap so much.

HITOP says, forget rigid categories, let's think dimensionally and hierarchically.

It maps psychopathology across six levels, from a super broad general psychopathology factor, down through spectra like internalizing or thought disorder, all the way to specific symptoms.

So something like GAD or major depression.

In HITOP, they're seen as expressions of where someone falls on the internalizing spectrum dimension, the pros.

Advocates say it might map better onto genetics, it's more streamlined, and explains why one treatment might help different DSM diagnoses.

But it's new, still needs more research for some areas, it's still descriptive, not causal, and figuring out where dimensions begin and end can be fuzzy, plus practical challenges for clinicians used to categories.

Okay, one more alternative, the power threat meeting framework, or PTMF.

This comes from the British Psychological Society, and it's radically different.

It's an alternative non -diagnostic conceptual system.

It basically rejects the whole idea of psychiatric disorders causing distress.

Instead, it points to psychosocial factors, specifically economic and social injustices.

It looks at three key things.

Power, what actually happened to the person, physical, economic, interpersonal power dynamics, etc.

Then threat, how people respond to those power dynamics, like trying to manage overwhelming feelings, seeking safety.

And finally, meaning how people make sense of it all, leading to feelings like hopelessness, shame, or maybe outrage.

So for instance, common responses after experiencing childhood abuse,

PTMF wouldn't call them symptoms of a disorder, but rather expected and reasonable responses to overwhelming experiences.

It totally refrains it.

PTMF gets praised for really putting social justice and the social origins of distress right at the forefront.

It aligns well with the idea of formulation, which we'll get to.

But criticisms include potentially downplaying biology or individual psychology, maybe being a bit vague on power or threat, and lacking the kind of research support traditional systems have, though its proponents argue for different kinds of evidence.

It's definitely provocative.

It forces us to remember how much mental health is tied up with broader social structures, challenging that individual medical focus.

Okay, so we've talked a lot about diagnosis labeling, but you just mentioned formulation.

Let's pivot to that.

If diagnosis is the label, what's formulation?

Formulation is more like the map, right?

It's a hypothesis, a story about a person's difficulties, but grounded in psychological theory.

It's really about the client's unique situation, using theory to understand how things developed and what might help.

Good formulations generally summarize the problem, link different issues together using theory, explain how things got this way, suggest ways to alleviate the distress, and crucially, they're flexible, revisable.

Exactly.

And there are a couple of main ways to approach it.

One is integrative, evidence -based case formulation.

This approach does include psychiatric diagnosis, but sees it as just one piece of information, maybe a social construct.

It usually involves listing problems, making a diagnosis, with that caveat, developing an explanatory hypothesis using theory, like psychodynamic, CBT, humanistic,

and then planning treatment.

The other common model is the 4P model.

This one often excludes formal diagnoses, seeing them as too static.

It looks at 4Ps,

preconditions, vulnerabilities, biological, psychological,

social, precipitating factors, the triggers, what brought them in now, perpetuating factors, what keeps the problem going, and protective factors, strengths, resources.

Let's bring Jill back.

How would different theories formulate her situation using, say, the 4P idea?

Well, a humanistic formulation might focus on her psychological incongruence, feeling disconnected from her true self because of that conditional positive regard from parents pushing medicine over ballet.

Therapy.

Empathy.

Genuineness.

Unconditional positive regard to foster self -actualization.

A cognitive behavioral, or CBT, formulation would look at her underlying beliefs or schemas, like, I need guidance, I must defer to be liked.

Her cognitive distortions, statements about med school may be a catastrophizing failure, and how deferring gets negatively reinforced.

Therapy.

Challenge distortions, modify schemas, try new behaviors, or a narrative formulation might see Jill caught in a problem -saturated story about anxiety and lack of motivation.

Therapy would aim to externalize the problem, the anxiety, not my anxiety, find exceptions or sparkling moments where she felt different, and co -create a new, preferred story.

So, you see, the theory really shapes the map, and there's still debate about whether diagnosis should be part of formulation or if formulation stands alone.

That really clarifies the difference.

Okay, last big piece.

Assessment.

This is all about gathering the information needed to understand or diagnose someone's difficulties in the first place, and just like with diagnosis, the tools we use for assessment need to be standardized, reliable, and valid to be truly usable.

Absolutely.

Clinical interviews are fundamental.

Unstructured interviews are pretty open -ended.

You might start with Jill by just asking, what brings you here today?

And let her try the conversation.

Flexible, but maybe less standardized.

Structured interviews, on the other hand, use specific questions in a set order.

Much higher reliability.

The mental status exam is a classic example, observing appearance, mood, thought processes, cognition, insight.

A clinician might note Jill's lethargy or lack of insight during one.

Then there are tools like the structured clinical interview for DSM disorders.

The SCID?

It's semi -structured, using decision trees to systematically check for DSM criteria.

It could help confirm that GAD diagnosis for Jill.

Moving beyond interviews, we have personality tests.

Objective tests use standardized items, often multiple choice or true -false.

Think of the MMPI, the Minnesota Multiphasic Personality Inventory.

The latest, MMPI -3, has hundreds of items.

Clinical scales, validity scales.

Jill's profile might show high scores related to demoralization and negative emotions, supporting GAD, while validity scales might suggest she's maybe minimizing her distress.

Easy to score, but might miss nuances.

Projective tests, on the other hand, use ambiguous stimuli, like inkblots or pictures, and ask for open -ended responses.

The idea offered from a psychodynamic view is that people project their inner world onto the stimuli.

The Rorschach inkblot method is the famous one.

Or the thematic gap reception test, the TAT, where you tell stories about vague pictures.

Jill's TAT stories, maybe about escaping or feeling controlled, could offer insights into her underlying conflicts.

We also have specific cognitive and behavioral assessments.

Behavioral assessment really focuses on the environment, the ABCs.

Antecedents, what comes before, the behavior itself, and the consequences, what happens after.

Observing Jill, behaviorists might track when her anxiety spikes, maybe before pre -med classes, less so during ballet.

Cognitive assessment looks at thinking patterns, self -efficacy beliefs, negative thoughts, distortions.

Tools like the daily record of dysfunctional thoughts, or even the Beck depression inventory, fall here.

Humanistic approaches have their own assessment styles, too, often focusing on the client's own meanings using everyday language.

The Q -Sort has clients sort descriptive cards about themselves.

Or the Role Construct Repertory test explores how people construe important figures in their lives, like Jill seeing her mother as powerful versus her friend as influenced.

And of course there are intelligence tests, like the Waze or YSC, giving an IQ score, often used for school predictions or diagnosing disabilities.

Finally, neuropsychological and neurological tests.

Neuropsychological tests are psychological tests assessing cognitive or motor skills to infer brain function, things like the Bender -Gestalt or Halsted -Ryton battery.

Neurological tests directly measure brain physiology, e .g.

measure brain waves.

Neuroimaging, like PET scans or fMRI, actually look at brain structure or activity.

But, and this is really important, despite all these amazing technologies, we cannot yet diagnose specific mental disorders using neurological tests alone.

We can see brain differences on average, maybe, but not make an individual diagnosis that way.

Yeah, that's a crucial point to remember.

And weaving through all of these assessment methods is that ever -present risk of culture bias.

We have to keep coming back to this.

Every tool is made in a cultural context.

Construct validity bias is when a test accidentally measures something else, like an intelligence test, really measuring English familiarity.

Content validity bias happens if test items don't make sense or aren't relevant across cultures, like asking someone unfamiliar with Western dining to match a cup and saucer.

And predictive validity bias means the test doesn't predict future outcomes equally well for different cultural groups.

It just hammers home how critical awareness of culture bias is for making assessments as fair and accurate as possible for absolutely everyone.

Okay,

so what's the big takeaway here?

We've journeyed through this really intricate landscape diagnosis with DSM and ICD formulation, all these different assessment tools, the alternatives, the debates.

I think what's clear is that understanding mental distress isn't just one simple path.

It's this dynamic field full of evolving ideas, constant arguments, and really critical ethical considerations you have to navigate.

Absolutely.

And the choices clinicians make, which diagnostic system, which assessment tools,

whether to focus on formulation, these reflect their whole perspective and profoundly shape the kind of care someone receives.

As you continue studying, just remember every single approach has its strengths, its weaknesses, the right answer.

It so often depends on the specific situation, the individual client, and our constantly changing understanding of the human mind.

So maybe a final question for you to In a field where everything is always evolving, how will you start to weave together these diverse threads,

diagnosis, formulation, assessment, culture, to build your own effective, comprehensive, and really compassionate way of supporting mental well -being?

That's a great question to end on, and that's all the time we have for this deep dive into diagnosis, formulation, and assessment.

We really hope this shortcut has left you feeling better informed and hopefully inspired to keep exploring.

From all of us at the Deep Dive and the Last Minute Lecture Team, thanks so much for joining us.