Abstract
There is abundant evidence that neurocognitive deficits are present in schizophrenic patients (Aylward et al. ). A recent meta-analytical review of neurocognitive test variables concluded that schizophrenia is characterized by a broadly based, moderately severe (d = . ) cognitive impairment, with varying degrees of deficit in all domains (Heinrichs & Zakzanis ). In comparison with learning disability these deficits are mild, with around % of patients scoring in the deficit range on most tests of cognitive function (Green ). This review will summarize some of the key findings regarding the relationship of cognitive deficits to the aetiology of schizophrenia.
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