1. DSM-III-R: Diagnostic and Statistical Manual of Mental Disorders;American Psychiatric Association,1987
2. Negative versus positive schizophrenia;Andreasen;Archives of General Psychiatry,1982
3. Event-related potentials to high-incentive stimuli in unmedicated schizophrenic patients;Brecher;Biological Psychiatry,1983
4. Signal-to-noise ratio and response variability in affective disorders and schizophrenia;Buchsbaum,1979
5. Evoked potential variability and cognitive variability;Callaway,1975