Transcranial direct current stimulation (tDCS) showed beneficial effects on cognition in healthy subjects and depressed patients. In this study, patients with treatment resistant negative syndrome in schizophrenia will be treated with direct current stimulation. fMRI measures will be performed.

Inclusion Criteria:

• schizophrenic patients with a negative syndrome. PANSS > 40.

Exclusion Criteria:

• other psychiatric or neurologic diseases.