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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