W6 - Personality disorders Flashcards
What are the three causes of personality disorders?
- genetic and heritability influences
- developmental and childhood experiences
- biological influences - neuropsychlogy
General heritability of PD?
Cluster A = 37%
Cluster B = 60%
Cluster C = 62%
All = 60%
Familial risk and BPD?
SKOGLUND et al 2019
- total population study
- risk was less associated with unaffected relatives
increased for MZ twins
Over all heritability of 46% therefore the environment also plays a part
In what the ways can the environment influence personality disorders?
Childhood factors - parenting types:
- low level of affection
- lack of nurturing
- emotional and sexual abuse
- negative childhood experience
Bio factors: Cluster A
- Siever and Davis 1991
Higher levels of domaine leads -> cognitive/perceptual issues lead to cluster A PDs
Bio factors: Cluster B
lower level of serotonin -> impulsivity and aggression issues lead to cluster B PDs
Bio factors: Cluster C
Lower level of dopamine and higher levels of serotonin -> cause anxiety and inhibition which leads to Cluster C PDs
Bio factors: BPD
Noradrenergic-cholinergic -> cause affect regulation issues which cause BPD
What is dialectical behaviour therapy?
LINEHAN 1993 - BPD - problem solving and acceptance of the experience of the moment stages: - pretreatment - stage 1 stabilising stage - stage 2 - processing traumatic events - stage 3 - developing a sense of self - schema focused theory
What is the DSM-5 criteria for personalty disorders?
- pattern of behaviours that deviate from the normal
- enduring, inflexible, pervasive
- ## stable over time; track back to early childhood
What are 3 characteristics of the healthy self?
- identity - unique individual with stable boundaries
- self-direction - meaningful goals, appreciation of social norms and how to interact with others
- Positive interpersonal relationships
How does the five factor model relate to PD?
SAULSAN & PAGE 2004
- Neuroticism is related to all PDs
- Extraversion is related to histrionic/avoidant PD
What are the 3 PD in cluster A?
- Schizotypal
- Schizoid
- Paranoid
- all are defined as odd or eccentric PDs
What is Schizotypal PD?
- extreme discomfort and reduced tendency for close relationships
- odd beliefs
- unusual perceptual experiences
- odd thinking/speech
- general social anxiety
How do cluster A pd link to schizophrenia?
- beloved to be on the same spectrum as schizophrenia but less extreme/severe
- those related to someone with SZ are more likely to have Cluster A PDs