schizophrenia - theories

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  • Created by: Njsmith1
  • Created on: 10-06-14 13:06

Schizophrenia has many symptoms that show disrupted cognition, e.g, incoherent speech -providing explanation of hallucinations/delusions
Although cognitive psychology cannnot provide insight into  cause of schizophrenia, model is useful when it comes to treating the condition
The model focuses on the concept that their attention filters do not work adequately. Filters are used to lessen the amount of irrelevant stimuli in the world. Therefore lack of filters in schizophrenics make their world noisy and unpredictable
These ideas are tested by using the stroop test on schizophrenics. This involves identifying the colour of ink a word is written in. Barch et al claim schizophrenics tend to be slow to identify the colour which also does not match due to their lack of filters making it difficult for them.

FRITH - failure to appreciate the context of a situation, makes it difficult to work out peopls beliefs/intentions, e.g, someone offering their seat on the bus interpreted with paranoia.
Believes behaviour is caused by underactivity of frontal lobes in the brain - not conclusive though as it is hard to establish if this occurs because of cause or effect.

HEMSLEY - talks about importance of context but links it to the idea of someone failing to utilise schemas. They are cognitive shortcuts we develop when learning how to act in certain situations. Therefore, schizophrenics do not use schemas and use each situation as new which must be overwhelming, exhausting and confusing.

Difference in theories ~ Whilst Frith can explain disrupted cognition, Hemsley provides…


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