psychopathology Flashcards
Statistical infrequency
a mathematical way of identifying and explaining abnormal behaviour - rare behaviour is assumed to be infrequent and abnormal
evaluation of statistical infrequency
✔️real world application
❌unusual characteristics (high IQ scores are rare, but it is not undesirable)
Deviation from social norms
defines abnormality as behaving differently from what is expected
evaluation of deviation from social norms
✔️real world application (helps diagnose disorders - antisocial personality disorder)
❌cultural and situation relativism (social norms vary between cultures)
failure to function adequately
Rosenhan & Seligman (1989)
1) when a person no longer conforms to the standard interpersonal rules
2) when a person experiences severe personal distress
3) when a persons behaviour becomes irrational or dangerous to themselves or others
evaluation of failure to function adequately
✔️prevents a threshold for help
❌discrimination
deviation from ideal mental health
Jahoda (1958) good mental health if … - no symptoms or distress - rational and can perceive ourselves - self-actualise - cope with stress - realistic view of the world - good self esteem and lack guilt - independent - successfully work, love and enjoy our leisure
evaluation of deviation from ideal mental health
✔️useful tool for thinking about mental health
❌cultural relativism ( specified to western cultures)
obsessive compulsive disorder
a condition which is characterised by obsessions and/or compulsive behaviours. obsessions are cognitive factors whereas compulsions are behavioural.
a neurological disorder.
behavioural characteristics of OCD
1) compulsions are repetitive
2) compulsions reduce anxiety
3) avoidance
cognitive characteristics of OCD
1) obsessive thoughts - around 90% of people with OCD have obsessive thoughts
2) cognitive coping strategies
3) insight to excess anxiety - people are aware their obsessions and compulsions are not rational
emotional characteristics of OCD
1) anxiety and distress
2) accompanying depression
3) guilt and disgust
genetic explanation
chromosomes and DNA determine behaviour
Diathesis-stress
interaction between genetic predisposition and environmental factors
Co-morbidity
Where two or more disorders are likely to be present together
Serotonin
a neurotransmitter implicated in OCD
Neurotransmitter
brain chemicals released from vesicles that relay signals across the synapse from one neuron to another
Polygenic
where two or more disorders are likely to be present together
Neuron
nerve cells that process and transmit messages through electrical and chemical signals
Neural explanation
suggestion that the nervous system determines psychological characteristics including disorders
predisposition
making someone liable to something
candidate genes
genes which create vulnerability to OCD
- they regulate the development of serotonin in the system
aetiology
origins
heterogeneous
different
COMT gene
- regulates the neurotransmitter dopamine
- one variation results in higher levels of dopamine
- more common in OCD patients
SERT gene
- transportation issues cause lower levels of serotonin to be active in the brain - associated with OCD
- Ozaki et al (2003) published results from a study of two unrelated families who both had mutations of this gene. He found that 6 out of 7 family members had OCD
evaluation of genetic explanation
✔️evidence to support (Nestadt et al)
❌environmental risk factors
neural explanation
the genes associated with OCD are likely to affect the levels of key neurotransmitters in the brain
decision making systems
- some cases are linked with impaired decision making
serotonin levels
low levels of serotonin means normal transmission of mood-relevant information doesn’t take place and a person may experience low moods