Clinical and forensic psychology (year two) Flashcards
(174 cards)
give the medical defintion of abnormality
abnormal is something that worsens health and well-being
give the statistical definition of abnormality
abnormal is something that is unusual in the population
give the social definition of abnormality
abnormal is something that is disapproved in specific times and places, something that needs to be changed
Explain why mental distress is not the same as medical illness
SYMPTOMS
- Subjective/ Functional diagnosis
- What the individual feels/observes
- Often cannot be objectively verified by tests
- In mental “illness”, there are only symptoms
SIGNS
- Objective/Organic diagnosis
- What the doctor/medical professional observes after biomedical testing (scans, blood tests, etc)
- In mental distress, signs
Give arguments for and against the biomedical model for depression being genetic
FOR: Twin-based heritability around 37% (Sullivan et al, 2000, Genetic epidemiology of major depression: review and meta-analysis. Am J Psychiatry 157, 1552–1562). Replicated studies with similar heritability estimates cannot be brushed away by methodological criticism
AGAINST: Problems with Equal Environment Assumptions (EEA) and twin-study methodology.
FOR: Studies have found short variants of serotonin transporter gene 5-HTTLPR in depression- serotonin influences mood, and this gene variant may lead to less serotonin uptake- low mood
AGAINST: Many of these studies poorly conducted, small sample sizes, findings not replicated, publication biases, big pharma involvement (See also Van Der Auwera et al 2019 failing to find GXE in depression).
Explain how co-morbidity causes issues for the biomedical model
Are forms of distress really separate entities? For example, co-morbidity for anxiety and depression - 70% (Carter et al., 2001). Anxiety and depression are also characteristics of MANY other forms of distress too.
If there is large amount of overlap, makes no sense to view distress categories as distinctively separate biological disorders
Also, sufferers that have the same label have heterogeneous symptoms- people with the same diagnosis can have VERY different experiences
Describe the work of Emil Kraepelin
German psychiatrist
ideas firmly rooted in the German experimental psychology tradition
was one of the founding people in devising a systematic classification system for mental disorders.
Kraepelin believed that mental distress has it’s origin in the malfunctioning of the brain, and that observable symptoms can reveal the underlying mental disorder (a bit like the DSM system does today).
Kraepelin used a scientific, systematic approach, and collected over 1000 case studies (many of his own patients), and used them to test and refine his classification system. T
he existence of large captive populations in mental asylums enabled the establishment of a new professional discipline, psychiatry, as part of a medical profession
Define aetiology
Study of factors that cause mental distress
Can happen anytime before conception (epigenetics), prenatally during pregnancy, during birth and at any time during life
Should also learn HOW mechanisms function
Define necessary cause
Necessary cause: Y never occurs without the prior occurrence of X (but X can also occur without leading to Y)
Define insufficient cause
Insufficient cause: Y occurs only after X occurs with another variable, Z. Y does not occur when X occurs alone
Every factor is bidirectional
Give some difficulties in studying causality
Most studies are retrospective studies
Many studies are cross-sectional (rather than longitudinal)
Large number of variables, complicated relationships
Important influences difficult to manipulate experimentally
Sensitive variables hard to investigate
Participants may have difficulties in identifying/expressing feelings
Variables can be mediated by meaning – difficult to study
Lack of validity of diagnostic categories
Define epidemiology
The study of determinants and distribution of health-related topics
Define deductive and inductive approaches
Deductive approach: test a theory of causality using pre-determined variables (e.g surveys, experiments)
Inductive approach: explore experiences, and link them to causal theories or devise new causal theories (case studies, interviews, focus groups etc)
Give some advantages and disadvantages of case studies
Advantages
Good for rare occurrences
Can be useful for generating new ideas
Give some meaning to complex quantitative findings
Disadvantages
Impossible to generalise to whole population
Give some advantages and disadvantages of qualitative studies
Advantages
Brings new meaning to experiences
Can generate new hypotheses for quant studies
Can establish some causality
Disadvantages
Can’t be generalised to whole population
give some advantages and disadvantages of surveys
Advantages
Potential to have large, ecologically valid samples
Disadvantages
Reliance on self-reports
Often cross-sectional samples
Can have biased sampling
Based on potentially unreliable measures
Give some advantages and disadvantages of experiments
Advantages
May have some control over causality
Control over variables
Disadvantages
May not be possible to manipulate relevant variables
Low ecological validity
Samples may not be representative
Based on potentially unreliable measures
Give some issues of the biomedical model
We can’t measure serotonin; studies use different proxies, e.g how fast serotonin is synthesized in the brain (impossible to measure activity, synthesized rapidly and constantly)
No objective signs
We don’t know the function of mechanisms of serotonin in the brain
60+ years of research and millions of publications still cannot discover mechanisms
Describe research issues with the biomedical model
Guardian (2019): Systematic review, “The drugs do work: antidepressants are effective, study shows”
Authors and affiliations: lots of pharmaceutical interaction, by funding or by studies being run by people who are employed by pharmaceutical companies
Blind randomised controlled trials: not actually blind: antidepressants have other side effects, e.g nausea, lethargy, anhedonia, apathy – results in a reporting bias
Short-term studies: average duration is 6 weeks (myth about antidepressants kicking in within 2 weeks of use) – not a long enough time to measure, would be more beneficial to look after a long period of time e.g a year
Different antidepressants increase and decrease serotonin have the same effect : both act as same placebo
Any differences are meaningless in peoples life : Hamilton’s scale, 50 items and can score between 0 and 100 and a MDD cut off. A statistically significant score is meaningless to peoples lives when comparing before antidepressants and after antidepressants (scoring 2 points lower after taking SSRIs would be classed as significant, but that could make very little difference to a persons life
Eleanor longden : the voices in my head
Give some historical approaches to classification
- Kraepelin: attempted to reclassify mental conditions into dementia praecox contrasted with depression
- Group of schizophrenia’s encompassed dementia praecox
- Kraepelin’s approach assumes that symptoms covary and area part of a syndrome with common aetiology and course
Describe the ICD-10 and DSM5
- ICD-10
o Technically universal standard classification
o Recommended for admin/epidemiology purposes
o Forms basis UK NHS procedures - DSM-5
o APA
o Widely used in USA
o Recommended for epidemiology/statistical/research purposes
o Standard for researchers
Give arguments for the reliability of mental health diagnosis
- In the 1930’s and 1940’s a significant difference was observed between the schizophrenia diagnosis rates in the United Kingdom and the United States (Bellack, 1958).
- Comparison of the frequency and circumstances of schizophrenia diagnoses in Europe and America, suggested that the term ‘schizophrenia’ was being used in different ways in different places.
- The statistical reliability of the diagnosis of schizophrenia was found to be poor (kappa = 0.6, Spitzer & Fliess, 1974)
o Only 32% of the disagreement being due to poor measurement of symptoms
o 63% due to unclear criteria (Beck, Ward, Mendelson, Mock, & Erbaugh, 1962). - Kreitman (1961) suggested five different sources of error in diagnosis that could lead to unreliable diagnosis:
- The psychiatrists (the raters or diagnosers) might differ,
- the psychiatric examination might be different each time
- the patients might differ (they might mention different things, behave differently or even that their problems might have changed over time),
- the method of analysis might alter (there might be different rules for combining symptoms) and
- there could be different systems of names and styles of reporting.
Give arguments for the validity of diagnosis
- Diagnostic classifications should also be valid - scientifically meaningful and representing real ‘things’.
- Outcome (prognosis) for people with a diagnosis of schizophrenia, for example, is extremely variable (Bleuler, 1978; Ciompi, 1984) and attempts to define a diagnostic group with a more predictable outcome have not been very successful (Boyle, 1990).
- Diagnoses should also indicate what treatments will be effective.
o However, it appears that it is difficult to predict what treatment people will receive even on the basis of the diagnosis they receive (Heather, 1976).
o Bannister and colleagues (1964) found that in fact treatments often appear to be given for reasons other than the diagnosis.
o Responses to medication for “schizophrenia” and “bipolar disorder” vary. Medication response is irrespective of diagnosis (Moncrieff, 1997).
Describe research findings of race and culture in diagnosis
- Considerable evidence that Black people in UK are more likely to be diagnosed as having mental illnesses and to be detained in secure hospitals (Commander et al, 1997)than Asian and White people.
- People from ethnic minority groups tend to receive more medical and physical treatments, and are under-represented in less coercieve forms of treatment, such as counselling and psychotherapy services (Ahmed, 1995; Littlewood and Lipsedge, 1997





