The purpose of the study is to examine the efficacy of tES in the treatment of MRAH of schizophrenia. The hypothesis is that tRNS will provide a larger reduction of AH in those with schizophrenia as compared to tDCS and no treatment (i.e. sham). Confirmation of this hypothesis would provide an exciting new option for treatment and may provide an even higher level of efficacy than is seen in tDCS. Further, this study would also provide replication of the work by Brunelin et al. and further support of tES as a compelling tool for the management of severe MRAH.