Cognitive explanation of schizophrenia

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Psychology unit 4 schizophrenia revision
Cognitive explanation of schizophrenia
Description
States that biological factors cause the initial sensory explanations associated
with schizophrenia but further symptoms are a result of a person trying to make
sense of these stimuli. They first hear voices but when they try to confirm these
by talking to others and others can't confirm these voices the individual thinks
they are hiding the truth from them. This leads to individuals rejecting feedback
from those around them and then they develop delusional beliefs that they are
being manipulated or persecuted.
Evaluation
There is a link between biological and cognitive causes which is supported
by studies which shows high levels of dopamine in the prefrontal cortex is
linked to a poor working memory in schizophrenics
/ CBT is successful in reducing positive symptoms and this suggests that
the explanation is valid as the treatment works. However, the evidence is
weak as most studies had the extraneous variable of medication.
/ Reductionist as whilst it does include other explanations such as the
biological explanation it doesn't include others such as the psychodynamic
explanation. Therefore we only gain a limited understanding of the causes
of schizophrenia. However, as it is reductionist it means that one factor is
well understood.
Only accounts for some symptoms such as delusions, hallucinations,
abnormal behaviour and alogia so we don't know the causes of other
symptoms. However it explains more symptoms than the psychodynamic
explanation.
Diathesis stress model applies to this explanation as the cognitive
explanation states that a biological factor (hallucinations) along with an
environmental factor (reactions from others) can cause schizophrenia. The
model states that a biological and environmental factor are both needed to
cause schizophrenia and therefore it supports the cognitive explanation.

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