Negative difference (Nd), an ERP marker of stimulus relevance: different lateral asymmetries for paranoid and nonparanoid schizophrenics.


We studied Nd in psychotic patients with varying degrees of paranoid symptoms. Nd is an ERP measurement of the difference in the way a nonattended tone is registered and the way the same tone is registered when used later as a discrimination target. In a three-tone oddball paradigm with passive-tone presentation and active discrimination, we recorded from… (More)


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