Chapter 26: Personality Disorders

Welcome to Last Minute Lecture.

This free chapter overview is designed to help students review and understand key concepts.

These summaries supplement not replaced the original textbook and may not be redistributed or resold.

For complete coverage, always consult the official text.

Welcome to the Deep Dive.

If you've ever found the whole topic of human personality, well, a bit confusing or dense, you are definitely in the right place today.

We're going to unpack a comprehensive scientific framework, drawing directly from a key chapter in Kaplan and Sadok's textbook.

It's all about personality and its disorders.

Our goal isn't just to list definitions.

We want to pull out this really revolutionary idea that modern psychiatry sees personality, not as something set by your genes at birth, but as a dynamic system, something you can actually train and shape.

We're moving past you are who you are to look at the actual blueprint for, well, potentially changing who you are.

Absolutely.

And we should jump right into that core shift because the science here is fascinating.

It really validates this idea of malleability.

So personality in this modern view isn't just one single thing.

It's how three distinct systems of learning and memory interact.

These systems are temperament, which shapes your basic emotional habits.

Then there's intentionality, which is about your rational goals, what you aim for.

And finally, self -awareness, which guides your deeper values.

Okay, three systems, habit, goals, values.

Makes sense.

And the science backing this up is pretty stunning.

Researchers looked at the genetics, right?

They found almost all the heritability boils down to about 972 genes.

972, okay.

But here's the kicker.

Those genes aren't just scattered randomly.

They organize very neatly into three networks that map almost perfectly onto those three systems,

temperament, intentionality, and self -awareness.

Wow.

Okay.

So the genetics actually line up with this three -part structure.

That's pretty compelling.

But you mentioned something about an evolutionary angle in the sources that caught my eye.

Exactly.

This is where it gets even more interesting.

They compared our human genome to Neanderthals and chimps.

They found 267 genes that are unique to us, modern homo sapiens.

To meet us.

And most of these unique genes are what they call long RNA regulatory genes.

Now that sounds technical, but basically they don't build proteins directly.

They act like master switches.

Okay.

They organize how other genes get expressed.

And guess where these unique human genes are most active?

Let me guess.

The self -awareness network.

No.

Overwhelmingly active in the self -awareness network.

So our most recent evolutionary upgrades, so to speak, are heavily invested in self -awareness.

That really suggests that this capacity is, while fundamental to what makes us human, to a healthy personality.

It strongly suggests a pretty profound evolutionary leap.

Maybe finishing up only around a hundred thousand years ago.

Yeah.

It gave us this unique ability for reflective thought, creativity, self -consciousness.

Right.

Okay.

So let's dig into this framework more.

If personality isn't fixed, how do we define it then according to this model?

The definition they use is really key.

Personality is the dynamic organization of those biopsychosocial systems.

Dynamic organization, meaning it changes, it adapts.

Precisely.

It's how a person uniquely shapes and adapts to their environment, both internal and external, as it changes over time.

It's always learning, always adjusting.

And this dynamic organization, it rests on those three components you mentioned earlier.

Yes.

First up is temperament.

Think of this as your emotional core.

It's largely heritable, your basic disposition.

It operates through memory, which is learning by associated conditioning habits, basically.

So gut reactions, fear, anger, attachment, that kind of thing.

Exactly.

Your basic emotional engine.

Then number two is character.

This is more the conceptual core.

It's the rational, intentional part, your mind's sort of self -government system.

Okay.

So this involves those intentionality and self -awareness networks you talked about, dealing with goals, values, concepts.

Right.

It's about conscious goals and values.

And finally, the third piece is identity.

This is the narrative self, the story you build about who you are.

The story we tell ourselves.

Yeah.

It's cultivated in your autobiographical memory.

Scientists sometimes call this autonoetic consciousness, your ability for mental time travel, reflecting on your past and imagining your future.

Identity integrates your emotional drives from temperament with your goals and values from character across your life story.

Okay.

Temperament, character, identity.

Let's break down temperament first, that emotional core.

The sources highlight four major traits, right?

And their dimensions and not boxes.

Correct.

Quantitative dimensions.

Everyone falls somewhere in each of the four.

They're universally recognized and moderately heritable.

So the first one is harm avoidance or HA.

This sounds like the worry system.

You're biased towards inhibiting behavior when faced with punishment or uncertainty,

basically fear.

That's a good way to put it.

High HA individuals tend to be more pessimistic, fearful, maybe shy, easily fatigued.

And low HA.

Those are your carefree, daring, energetic, optimistic types.

And the neurobiology is pretty clear here.

High HA is strongly linked to serotonin activity.

Ah, okay.

Which is why SSRIs, antidepressants that target serotonin, often help with anxiety and fearfulness.

They're directly modulating that system.

Precisely.

It targets that specific temperament dimension.

It makes total sense.

Okay.

Dimension number two, novelty seeking NS.

So if HA is the brakes, NS is the accelerator.

The bias towards exploring new things, seeking rewards, linked to maybe anger or exploration.

Exactly.

The exploratory drive.

And this one is all about dopamine.

Specifically, those mesolimbic and mesofrontal pathways involved in reward and motivation.

So high NS people are?

Often quick tempered, impulsive, maybe extravagant or disorderly.

They crave stimulation.

Low NS individuals, they're more cautious, reflective, maybe orderly, don't need constant excitement.

You can really picture the extremes.

High HA, low NS person avoids risks.

High NS, low HA person might be skydiving.

Or starting multiple projects at once.

Yeah.

It's that drive.

Okay.

Third dimension, reward dependence, RD.

This sounds like the social blue.

Maintaining behavior based on social cues, approval, attachments.

That's it.

Deeply tied to our attachment system.

High RD individuals are often sentimental, sensitive to others' feelings, maybe dependent, but also warmly sociable.

They value connection.

And the neurobiology.

This one's linked to norepinephrine and also interestingly, oxytocin.

Higher plasma oxytocin levels correlate positively with higher reward dependence scores.

The bonding hormone?

Makes sense.

And low RD people?

They tend to be more practical, maybe tough -minded, objective, detached, less swayed by sentiment or social approval.

Right.

And the last one, persistence PS.

Ah, persistence.

This is pure grit.

It's your bias for maintaining behavior, even when rewards are infrequent or you face frustration.

Think ambition, determination.

So high PS people are the hardworking, determined types, maybe perfectionistic.

Definitely.

They stick with things.

Neurobiologically, it's linked to the ventral striatum and resistance to extinction, the ability to keep going even when the reward isn't always there.

That's crucial for long -term goals.

It defines ambition, really.

Okay.

Four dimensions.

Harm avoidance, fear inhibition, novelty seeking, exploration impulse, reward dependence, attachment social, and persistence, grit ambition.

That clarifies temperament.

Now let's move to character.

You call it the mind's self -government.

If temperament is the raw emotional energy, character is how we channel it.

Exactly.

It's the driver managing the engine.

And it also has measurable traits, typically broken down into three main ones, acting like the executive, legislative, and judicial branches of your internal government.

Okay.

Intriguing analogy.

Let's start with the executive function, self -directedness or SD.

What's that?

SD is basically your competence in adapting your behavior to reach goals that you have chosen.

It's about responsibility,

purposefulness,

resourcefulness.

So being effective in managing yourself and your life.

High SD means you're responsible, maybe resourceful, realistic.

And the source mentioned self -accepting.

Yes.

Self -accepting is a key part of high SD.

It's not just about willpower.

It's about realistic self -assessment and taking responsibility.

Low SD individuals, conversely, tend to be blaming, feel helpless, maybe unreliable, and struggle to accept responsibility for their actions.

Okay.

I see the distinction now.

It's not just having goals.

It's the ability to regulate yourself to actually achieve them.

Mastering impulses, not just having them.

Precisely.

Then we have the legislative function.

Cooperativeness.

QCO.

This is your ability to get along with others,

essentially.

Identifying with and accepting other people.

Making and following social rules.

So high CO means you're generally tolerant, empathic, compassionate, principled.

You work well with the social contract.

Exactly.

You see yourself as part of society.

LOFIO, on the other hand, manifests as intolerance, being self -absorbed, perhaps opportunistic, maybe even revengeful.

Difficulty seeing things from others' perspectives.

Right.

And you mentioned something crucial earlier about these character traits.

Yes.

And this is probably one of the most important takeaways for understanding personality disorders.

The research consistently shows that low scores on character traits, especially self -directedness and cooperativeness, are the common denominator.

They are the core feature shared across all diagnosed personality disorders.

Wow.

So it doesn't matter as much what your temperament profile is, high novelty seeking, high harm avoidance, whatever.

If your SD and CO are low, that's where the significant pathology lies.

That's the central finding.

You could have any mix of temperament traits, but if you lack the capacity to effectively direct yourself and cooperate with others, that inability to self -govern is the core problem.

That is a huge insight.

Okay.

What's the third character trait?

The judicial function.

That's self -transcendence or ST.

This one is fascinating because many earlier, more materialistic models of psychology completely missed it or dismissed it.

Self -transcendence.

What does that actually mean?

It's the capacity to see yourself as, well, part of something larger than just your individual self, part of the universe, connected to nature, having spiritual feelings or a sense of unity.

So like finding meaning beyond the self.

Exactly.

And the sources really emphasize its importance.

High ST is actually major predictor of healthy personality development and maturation.

It's associated with qualities like altruism, humility, spiritual acceptance, contemplation, hope, faith, love.

It provides the overarching values that help integrate your habits, temperament, and goals character.

Interesting.

So low ST would be more pragmatic, materialistic, maybe controlling, focused only on the individual.

Typically, yes.

More conventional perhaps, less concerned with those bigger picture, existential or spiritual aspects.

Okay.

So temperament provides the emotional color,

character provides the self -regulation and social skills, and self -transcendence provides the overarching meaning or values.

That's a great summary of the model.

So if the core issue in personality disorders or PDs is this poor character development, especially low ST and CO, let's connect this back to the clinical picture.

How does the DSM -5 define a PD?

Right.

The DSM -5 definition points to an enduring,

inflexible, and pervasive pattern of inner experience and behavior.

It deviates markedly from cultural expectations, causes significant distress or impairment in functioning, and typically traces back to adolescence or early adulthood.

Enduring, inflexible, pervasive.

Got it.

And how do the familiar DSM clusters map onto this temperament framework?

There are pretty clear associations.

Cluster A, the autocentric types like paranoid, schizoid, schizotypal, they are strongly associated with low reward dependence.

That social detachment, indifference or suspicion fits perfectly.

Makes sense.

Cluster B, the dramatic erratic ones, antisocial, borderline, histrionic, narcissistic.

That cluster just screams high novelty seeking.

Impulsivity, dramatic behavior, emotional instability, sometimes aggression.

It's that NS drive, often poorly regulated by character.

Okay.

And cluster C,

the anxious, fearful group, avoidant, dependent, obsessive, compulsive.

That maps directly onto high harm avoidance, pervasive fearfulness, inhibition, anxiety,

worry about negative outcomes.

So the clusters give you a hint about the dominant temperament profile.

Exactly.

And this is critical.

The diagnosis is never just about temperament alone.

It's always interplay between temperament and character.

Right.

You mentioned this earlier.

Can you give that example again?

Sure.

Take someone high in novelty seeking and low in harm avoidance.

That's your classic adventurous risk taking temperament.

If that person also has high character, high SD &CO,

they might become, say, an innovative scientist, an explorer, a successful entrepreneur.

But take that exact same temperament profile, high NS, low HA and combine it with low character, low SD &CO.

That's when you're much more likely to see issues like impulsive PDs, maybe antisocial personality disorder.

The underlying drive is the same, but the capacity to manage it constructively is missing.

So the difference between, say, an eccentric but functional artist and someone with a diagnosable schizoid personality disorder often comes down to their level of self -directedness and cooperativeness, their ability to function in the world.

Precisely.

It's the character development, or lack thereof, that distinguishes healthy variation from pathology.

Okay, that really clarifies the diagnostic picture.

Let's talk treatment then.

We know working with PDs can be challenging.

What did the sources say about what actually works?

There was a really striking statistic in the material.

When you look at what predicts successful outcomes in therapy for PDs, common psychosocial factors account for the vast majority, something like 85 % of the variance.

85 %?

What are those common factors?

Things like the quality of the therapeutic relationship, the alliance respect, empathy,

the therapist's genuineness, the human connection stuff.

And specific techniques like CBT, DBT, psychodynamic therapy,

even medication.

According to this analysis, those specific techniques only account for about 15 % of the variance and outcome.

Wow, 8515.

That really underscores that the relationship and the core human elements are paramount.

It does.

It suggests that lasting change isn't just about techniques.

It's fundamentally a learning,

growth, and developing self -awareness within a supportive relationship.

So a holistic treatment approach then.

What does that look like in this model?

The focus is on activating three key processes that lead to well -being.

First, plasticity that's the willingness and ability to change those ingrained habits, the temperament stuff.

Okay, being open to change.

Second, virtue.

This relates to developing intuitive insight into what's good, fair, and meaningful.

This is guided heavily by self -transcendence, finding those higher values.

Finding your moral compass, almost.

In a way, yes.

And third is creative functioning.

This is about achieving coherence, getting your habits, your goals, and your values all aligned and working together congruently.

Plasticity, virtue, creative functioning.

How do therapists actually help someone cultivate this, especially the self -awareness part?

The process is often described as an upward spiral of developing self -awareness.

It happens in stages.

Stage one is often just about learning basic relaxation and mindfulness skills.

Learning to let go of being constantly hijacked by negative emotions, creating some mental space.

Okay, calming the waters first.

Exactly.

Stage two involves developing metacognition, or deeper mindfulness.

Becoming what they call allocentric or other -centered.

It's about learning to observe your own automatic thoughts, feelings, and impulses without immediately reacting or judging them.

Like cultivating an internal good parent understanding and compassionate towards your own struggles.

Observing yourself without judgment?

That sounds like a key step.

It is.

And then the real transformation often happens in stage three.

Contemplation.

This isn't just observing thoughts.

It's gaining direct insight into your deepest, often pre -verbal schemas.

Those core beliefs and relational patterns formed very early on.

Wow, getting to the root.

Yes.

And accessing this level often awakens deeper feelings, maybe ones that have been buried, like hope, genuine compassion, awe, reverence.

This is where true character transformation can happen.

Integrating the whole system.

Temperament, character, identity.

That definitely sounds like deep, probably long -term work.

So where does medication fit into this picture?

You mentioned as part of that 15%.

Right.

Pharmacotherapy is seen primarily as a tool to help stabilize the system, making the learning process possible.

It mainly targets the temperament dimensions.

Like the SSRIs for high harm avoidance we talked about?

Exactly.

Or sometimes mood stabilizers like lithium or Valprote might be used to manage the extreme impulsivity or aggression linked to high novelty seeking, especially in cluster B disorders.

So meds help manage the symptoms enough for the person to engage in the deeper work.

That's the idea.

They can reduce the emotional noise, making it easier to learn self -regulation and develop insight.

But medication is almost never a cure on its own.

It doesn't build

or foster self -awareness.

It's a temporary support, not a substitute for the actual work of personality development.

Got it.

So zooming out one last time, the big picture here is that personality growth, maturation, becoming integrated, it's all fundamentally about expanding self -awareness.

That's the core message.

Developing that capacity allows you to consciously weave together all those different threads, your emotional habits from temperament, your rational goals from character, and your transcendent values from self -transcendence into a coherent, functional, and meaningful whole.

And that coherence, that integration, links back to self -transcendence again, doesn't it?

It really does.

The source material makes a strong point that pursuing purely materialistic goals, which is characteristic of low self -transcendence, often leads to disappointment.

Why is that?

Because fundamentally pure self -interest tends to be insatiable.

There's never really enough.

The drive just keeps going.

So striving only for personal gain, focusing only on the individual self, is ultimately kind of empty or unsustainable.

That's the implication.

The path towards real coherence towards psychological health and laughing happiness seems to require acknowledging and cultivating that deeper need for self -transcendence, recognizing that we're not isolated individuals, but part of something larger.

Accepting that we are,

as the

interconnected and finding meaning through participating in something greater than just ourselves.

That's quite a profound takeaway rooted right there in our biology and evolution.

It really is.

It suggests our own genes are pointing us towards connection and meaning beyond the self.

Thank you for taking this deep dive with us into the structure of personality.

We hope this knowledge serves you well.