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Background and purpose Self-esteem or self-concept is a critical construct in the field of psychopathology research on persecutory delusions(PD).However,its role in the formation and maintenance of PD remains unclear and has inconsistent conclusions.There are two major theory about the self-esteem and PD.One of the two theories is Bentalls hypothesis which claims that PD might serve to prevent low self-esteem reaching conscious awareness by enhance explicit self-esteem,and become an extreme self-serving bias as a defense to protect the self,this inconsistence related to PD.