Before revision: Effect of schizophrenia A study conducted involving the dichotic listening test, with emphasis on subtypes of schizophrenia (particularly paranoid and undifferentiated), demonstrated that paranoid schizophrenics have the largest left hemisphere advantage – with undifferentiated schizophrenics (where psychotic symptoms are present but the criteria for paranoid, disorganized, or catatonic types have not been met) having the smallest.
After revision: Effect of schizophrenia A study conducted involving the dichotic listening test, with emphasis on subtypes of schizophrenia (particularly paranoid and undifferentiated), demonstrated that people with paranoid schizophrenia have the largest left hemisphere advantage – whereas people with undifferentiated schizophrenia (where psychotic symptoms are present but the criteria for paranoid, disorganized, or catatonic types have not been met) having the smallest.