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Critically Consider Biological Explanations of Schizophrenia Essay title: Critically Consider Biological Explanations of Schizophrenia The term ‘schizophrenia’ covers a group of serious psychotic disorders characterised by a loss of contact with reality. It comes from two Greek words: schiz meaning ‘split’ and phren meaning ‘mind’. DSM IV (1994) estimate that the occurrence rate of schizophrenia.