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To understand the inherent limitations of trying to identify different personality disorders To understand the DSM-5 diagnoses and clusters To understand the high reported prevalence and comorbidity of personality disorders To understand factors that might cause personality disorders neurological, environmental To understand current evidence regarding effective treatment
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why does experience of CERN matter?
need to understand diversity of experience across individuals → beware of stereotypes
need to get away from stigmatising representations, e.g.: dangerous, wilful, self-obsessed
remember prevalence of PDs high
experience of a personality disorder- drawings from a former student + testimony

emotional and interpersonal sensitivity
small event know not big deal in rational mind → extremely emotional and dysregulated reaction
interpersonal relationships and lack of trust → born out of past experiences, maintained by current behaviours
what can CERN diagnosis experience be like?
paradoxical
being diagnosed can feel like being written off as: a problem person, having no prospect of change
being diagnosed can be an enormous relief: recognition that there is a problem, access to therapy
but the lack clarity about diagnosis and treatment can be frustrating too
how are personality disorders organised
clusters: a, b, c
cluster a
paranoid personality disorder
schizoid personality disorder
schizotypal personality disorder
cluster b
antisocial personality disorder
histrionic personality disorder
narcissistic personality disorder
borderline personality disorder
cluster c
avoidant personality disorder
obsessive-compulsive personality disorder
dependent personality disorder
conceptual issues
defining personality
personality problems in context
sociopolitical perspectives
defining personality
our tendency towards patterns of behaviour, emotion, cognition, and interaction that show through regardless of the situation we are in
i.e.- trait rather than state
label if these are trait vs state:
Anxious before an exam
Anxious all the time
Wanting to do an important job well
Wanting to do everything perfectly
state
trait
state
trait
defining personality- positive and negative
personality can be smth that has pos implications if fits demands of world
negative influence if it does not fit the world around us
categories vs dimensions
are pds just extremes on those dimensions?
big five- openness, extraversion, etc- defined in dimensional way, high or low
are PDs just extremes on those dimensions, if so how to establish cut off?
are PDs distinct clumps at either extreme? introversion or extroversion
or distinct clump at just one end of dimension? e.g. might see extreme neuroticism as a problem, but not extreme stability
→ efforts to define PDs use to assume simple categories (DSM-IV) → now more mixture of two approaches
DSM-IV definition of a PD
1994
enduring pattern of inner experience and behaviour that deviates markedly from expectations of the individual’s culture
- very vague definition
- could encompass unusual belief systems e..g flat earthers, that might have been quite normal at some points in history
dsm 5 taskforce: changing definition of a PD
lot more complex than dsm iv
lots of plans for change, based on problems with dsm iv
lots of debate
still have same categories (clusters) somewhat
DSM-V definition of a PD
2013
the essential features of a PD are impairments in personality (self and interpersonal) functioning and the presence of pathological personality traits
diagnosis of PD requires the following criteria (DSM5, 2013)
significant impairments in self (identity or self direction) and interpersonal (empathy or intimacy) functioning
one or more pathological personality trait domains or trait facets
impairments in personality functioning and the individual’s personality trait expression are relatively stable across time and across situations
impairments in personality functioning and the individual’s personality trait expression are not better understood as normative for the individual’s developmental stage or socio-cultural environment
impairments in personality functioning and the individual’s personaltiy trait expression are not solely due to the direct physiological effects of a substance (e.g. drug of abuse, medication) or a general medical condition (e.g. severe head trauma)
problems w dsm 5 definition
subjective: significant, normative
clinicians tend to use diagnosis regardless of substance use, nutrition issues, injury, etc
a semi difference between dsm iv and dsm v
dsm iv had 10 PDs
at end of long set of arguments, dsm v has same 10 diagnoses
but, dsm-5 included research proposals to allow for future potential change in diagnosis
dsm-5 included research proposals to allow for future potential change in diagnosis, regarding…
level of personality functioning
personality trait domains and facets
personality disorder types
summary of changes to dsm4→dsm5
5 maintains diagnostic criteria from 4
5 continues to define personality disorders on a categorical basis, like 4
but it discusses a dimensional approach to the diagnosis of PDs and encourages further research on these
key issues in researching a diagnosis
long term presentations
independent of biological factors- e.g. drug use, starvation, actual threat
diagnoses can not be made at a single clinical meeting
→ yet each of these gets ignored by clinicians, so cynicism reasonable
do not usually diagnose in childhood/adolescence, but debate
cluster a- what
odd/ eccentric
personality disorders with some schizophrenia-like features
lacking active symptoms like hallucinations
paranoid
schizoid
schizotypal
paranoid PD
pattern of distrust and suspiciousness
resistant to challenge by others
schizoid PD
pattern of separation from social rls
limited emotional expression and experience
schizotypal PD
pattern of eccentric ideas, magical thinking
cluster b- what?
dramatic/ erratic
personality disorders characterised by impulsive/erratic and/or self-centred behaviours, emotions, and thinking
antisocial PD
borderline PD
narcissistic PD
histrionic PD
antisocial PD
pattern of disregard of other’s rights
strong links to conduct disorders and criminality
selfishness and lack of empathy
borderline PD
in ICD- EUPD
pattern of unstable rls, mood, and behaviour
efforts to control emotion (e.g. drink; self-harm) and avoid rejection
narcissistic PD
pattern of overestimation of own abilities and accomplishments
pervasive need for admiration, while not caring abt others
anger when not recognised for their specialness
fragility of self-esteem
histrionic PD
attention-seeking, need to be the centre of attention
dramatic behaviour, undue emotional expression
exaggerated presentation
cluster c- what?
anxious/fearful
personality disorders characterised by anxiety that is lifelong
→ not related to any trigger
avoidant PD
dependent PD
obsessive-compulsive PD
avoidant PD
pattern of social avoidance
inadequacy, and sensitivity to others’ views of them
dependent PD
pattern of dependence on others’ care
submissive, clinging, seek others’ approval/support
obsessive-compulsive PD
excessive perfectionism (focus on doing the task: forget the goal)
need for order, patterns, and control
summary of diagnostic clusters
three broad clusters with ten diagnoses: odd/eccentric, dramatic/erratic, and anxious/fearful
big overlap across clusters and diagnoses- it is rare for ppl to only meet one personality disorder criteria → if one meets criteria for one PD, on average one meets the criteria for 4.5
prevalence of PDs
no clear onset → so focus on prevalence rather than incidence
rate found depends on how thorough the assessment is: many studies use weak measures and overestimate prevalence hugely; gender bias in diagnosis (Women cluster b+c; men cluster a)
most reliable studies suggest a rate 10-15% for all PDs. most common: borderline, schizotypal, antisocial, obsessive-compulsive
figures vary hugely- beware
comorbidity
high rate of cooccurring PDs → not so distinct after all
high rate of cooccurrance:
depression
substance misuse
panic disorder
PTSD
social phobia
eating disorders
afraid of abandonment (BPD) → dependent PD
is a personality disorder for life?
old viewpoint:
yes, but the symptoms tend to fade after 40 years of age
untreatable
current evidence:
no, as a large number of cases are not diagnosable a few years later
see Zanarini et al., (2013) for an example of such evidence: Disturbed cognitions are common in patients with borderline personality disorder and are distinguishing for the disorder. They also decline substantially over time but remain a problem, particularly those of a nonpsychotic nature.
treatment for some PDs effective in some cases
aetiology
study + causation of disease
framework for considering aetiology
biological/neurological factors
personality disorder → specific personality disorders
environmental factors

factors underpinning cluster A PDs- general
biological/neurological factors:
genetics
enlarged ventricles
enhanced startle response
cognitive deficits
→ lack of link to specific PDs
environmental factors:
parental relationships
rejection
abuse
factors underpinning cluster B PD: antisocial
biological/neurological factors:
childhood conduct disorder
genetics
low anxiety
weak fear condition (fearful event- worse at learning to respond in fearful way)
environmental factors:
modelling (schema- antisocial- angry and impulsive child)
factors underpinning cluster B PD: borderline
biological/neurological factors:
genetics
limbic system dysfunction
environmental factors:
trauma/emotional invalidation
factors underpinning cluster B PD: narcissistic
environmental factors:
doting parents ?
factors underpinning cluster B PDs- general
environmental factors:
experience driving schema development
schema → antisocial → angry and impulsive child
evidence for for disorders - treatment
limited evidence for most disorders
a range of clinical suggestions about such treatment - all evidence is for psychological intervention, rather than neurological
Beck et al (2016) provide a range of clinical guidance based on cognitive behaviour therapy
Some evidence for other, more integrative therapies: Cognitive analytic therapy (Ryle); Mentalisation-based treatment (Bateman)
psychological therapies for PDs
CBT for PDs- adapts Beck’s CBT approach for depression
Schema Therapy (Young; Artntz)- schemas and schema modes- integrative Cognitive Analytic Therapy (Ryle) - reciprocal roles in formulation
Mentalisation-based treatment (Bateman and Fonagy)- teaching to mentalise- putting youself in someone else’s shoes - improve awareness of self-states
Generalist approach: structured clinical management (Bateman and Fonagy)
psychotherapy for BPD- Cristeau et al., (2017)
33 studies
N = 2256 Ps
efficacy of psychotherapies for borderline personality disorder
a systematic review and meta analyses
importance- BPD is a debilitating condition, but several psychotherapies are considered effective
objective- conduct an updated systematic review and meta-analysis of randomised clinical trials to assess the effiacy of psychotherapies for BPD populations
data sources - search teams were borderline personality and randomised trials in pubmed, psycinfo, etc
study selection - included RCT clinical trials of adults w diagnosed BPD randomised to psychotherapy exclusively or to control intervention. study selection differentiated stand-alone design
→ some evidence for CBT for psychotherapy and for mentalisation based treatment
Oud et al., (2019)
austrailian and new zea journal of psych
20 studies
1375 Ps
some evidence trials were moderate quality
some evidence for BPD and DBT and schematherapy
the actual no of trials- Ps quite low, biggest one was DBT trial
Linehan trials that influence the analysis guidelines are relatively small
best treatment evidence
best evidence-based treatment seems to be re numbers + schema therapy (Young et al., 1990;2003)
integrated model → cognitive techniques, gestalt, behavioural techniques, attachment theory, object relations
treatment involves three ways of changing schemas: cog techniques, behavioural techniques, and experimental techniques incl imagery work and imagery rescripting to work with past negative events and and w the therapist to try to generate a new script and try and change the meaning of the negative experience
three ways of changing schemas:
behavioural- doing
feeling - experimental
thinking - cognitive
focus on:
therapeutic rls (rapport)
using mental imagery techniques
using Chairwork in therapy
→ first trial 2006, Geson, AJP
→ adapted approach, trial by Bali, 2014- for cluster C
→ combined group and individual therapy trial, using approach
schema therapy review taylor et al., (2017)
question- does schema therapy change schemas and symptoms? a systematic review across mh disorders
does it change beliefs, mechanism trying to target, and symptoms
40ish studies
most said wld measure both, only abt 12 reported results for schemas and symptoms
strongest evidence was for BPD w a few trials in EDs, PTSD lower areas
Arntz et al., (2022)
largest trial in CERN/PD
JAMA psych
RCT: Effectiveness of predominantly group schema therapy and combined individual and group schema therapy for BPD
495 ppl, 15 mh centres in 5 countries
495 Ps randomised
246- treatment as usual (TAU)
125- predominantly group schema therapy (PGST)
124- combined individual and group schema therapy (IGST)
findings:
the IGST group had signifcantly reduced BPDSI score compared with TAU and PGST groups
BPDSI score did not signficantly differ in PGST and TAU groups

primary outcome:
change in BPDSI (borderline personality disorder severity index) score at 3 y from baseline
score range 0-90, >20 clear bpd, <15 as recovery criterion
predominantly group schema therapy, ppl come together in a group 2x a week and the schema therapy and approach is taught + idea is group offers peer support
→ power to try to catalyse change so as ppl get better they see others improve too and sharing experiences can be powerfu
other thing they tested was 1-1 sessions + group sessions
1.5 treatment each
compared to best practice- DBT, mentalisation based therapy, etc
findings- best for combined group, individual and group had biggest reduction on BPDSI measure
Crawford et al., (2016)
Brief Psychological Support
brief individual psychological intervention for ppl with probable intervention for ppl w probable pd: a multicentre, researcher-masked, randomised, controlled superiority trial in england
N = 336
brief 10 session approach
no effect on social functioning, no cost effectiveness
too short- discharge was like “falling off a cliff edge”
what can be taken from Crawford et al., (2016)
problems r longer term bc it can take ppl a while to develop a rapport and to trust
shoet brief therapies- not much value testing more of them bc not much impact and they wld like to talk
where else is there good treatment evidence?
DBT (Linehan, 1993)- Cognitive behavioural treatment of BPD (but little attention to thoughts in manual)
trials good evidence, numbers quite small
it is a behavioural based programme
managing impulsive behaviours and thought processes in BPD
elements of contingency management, operant conditioning, mindfulness, etc
v resource intensive
designed to manage symptoms effectively, but not to remove cognitions, main outcome measure suicidality
elements of contingency management, what to do if situations come up, mindfulness as a strategy, resource intensive as well - involves group and individual , out of hours options to phone call if distressed etc
2009- no difference adding telephone support or not so dont use now unless ppl really want to
DBT + BPD
reduces suicide risk in individuals w BPD
one study- after one year of treatment, 75% no longer met criteria
emotional dysregulation, DBT employs opposite action skill
takes practice
which has better outcomes- ST or DBT? study
current ongoing netherlands study- Bufus trial
comparing DBT to ST
towards optional treatment selection for BPD patients (BOOTS): a study protocol for a mutlicenter randomised clinical trial comparing ST and DBT
conclusions
•Personality disorders are still not well defined overall
•The diagnoses themselves are still being refined
•There is more a movement within services to be less diagnostically focused and use CERN language, as less stigmatising
•The field is very much focused on borderline personality disorder
–more common than all the others put together
•The causes of the personality disorders are much more consistently about common developmental experiences (trauma, emotional invalidation) than about neurological factors
•There are effective psychological treatments for BPD
•But we still have only limited understanding of the factors that underpin the other personality disorders, and that lead to effective treatments