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Schizophrenia evaluation - Coggle Diagram
Schizophrenia evaluation
Biological explanations
Genetics
+RESEARCH SUPPORT - Tienari - found children who had been adopted but biological mothers have SZ have a 10% chance of developing SZ compared to the control groups 1%.
HOWEVER - Self report - SDB, Correlational - cannot determine cause and effect
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Family/adoption studies - Hard to find pps, twins are often raised in the same environment - nature vs nurture, diagnosis bias
- Concordance rate - 42% for MZ twins, 9% for DZ twins - shows genetics play a role HOWEVER - not 100% means there must be other factors
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Dopamine hypothesis
Iverson found post-mortems on SZ patients showed high levels of dopamine in the brain BUT - dead patients means we cannot determine cause and effect
Neuroleptic drugs can be used to block dopamine at the synapse which will reduce symptoms as found by Davidson and Neale HOWEVER - does not explain negative symptoms which are caused by too little dopamine
Reductionist - does not take into account environmental factors or psychological explanations - people feel they are not in control but being simple means it is easier to understand
Treatment aetiology fallacy - misconception that treatment indicates the cause of a disorder. Even if drugs that decrease dopamine levels reduce symptoms, doesn't mean it caused it. May be placebo effect or temporary
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