Clinical Psychology Flashcards
What is clinical psychology
it looks at understanding and explaining mental disorders. It concerns the classification and diagnosis of mental disorders and how mental disorders such as schizophrenia are treated.
what are the 2 ways in defining abnormality?
statistical abnormality and deviation from the social norms
What is statistical abnormality
looking at how often something occurs. If it rarely occurs then it is defined as abnormal. An example is IQ. People with an IQ of below 70 and above 130 are seen as abnormal. 10 and 130 are 2 standard deviations away from the average which is 100.
2 Advantages of statistical abnormality
- quantitative so objective and reliable
- can be repeated and will get the same results
4 Disadvantages of statistical abnormality
- people with high IQ’s are considered abnmormal which suggests it is a bad thing
- the cut off point Is bad. an IQ of 71 of normal but an IQ of 69 isn’t
- disorders such as depression are not rare so wouldn’t come up as abnormal
- not valid
what is deviation from the social norms
A social norm is a behaviour or belief that most people stick to in society. when people go against the social norm it attracts attentions and people judge them as abnormal.
an example is paedophilia
2 advantages of the social norms definition?
- the majoirty of society share the same norms
- valid
4 disadvantages of the social norms definition?
- not reliable
- if a groups is disliked they could be labelled as abnormal
- subjective
some behaviours go against the norms but it doesn’t mean they are abnormal
what is the difference between classification and diagnosis?
classification - taking sets of symptoms and categorizing them under disorders
diagnosis - looking at a patients symptoms and deciding what disorder they have
Before diagnosing someone what do you have to rule out
that it is not caused by any medication they are taking
what 2 systems are used for classification and diagnosis
DSM and ICD
what 3 reasons are there to classify and diagnose disorders
- patients then receive help
- patients and family receive a piece of mind
- researchers can work on treatments
what is reliability?
the consistency in which a mental disorder is diagnosed as
what is inter rater reliability?
different clinicians all reaching the same diagnosis
what us test re test reliability?
retesting a patient
what does the PPV calculate?
the percentage of people who keep the same diagnosis over time
what does the cohens Kappa do?
it is a scale of 0-1. It looks at the correlation between 2 diagnosises. a kappa of 1 means complete agreement so its reliable.
what did Pontizovsky (2006) find?
found 94% of patients had the same diagnosis on admission and release from hospital so the ICD is reliable
What did Nicholls et al (2000) find?
looked at the diagnosis of eating disorders within children and found neither the DSM or ICD had inter rate reliability
what is validity?
the extent to which a measure of a variable measures what it set out to measure
when is a diagnosis system valid?
if the diagnosis successfully identifies a condition
what is predictive validity?
identifying a condition that will respond a certain way to treatment
what is criterion validity?
the diagnosis agrees with a diagnosis made another way
what is construct validity?
the extent to which the category of a mental disorder really exists
what experiment was conducted testing the validity of diagnosis?
Rosenhan (1973) on being sane in insane places’
what was the aim of Rosnehans study?
to see how well psychiatrists could dictinguish between real and fake patients and see how valid the DSM2 is