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| Authors | Sample characteristics | Results of relevant neuropsychological studies |
|
| Lafayette et al. [58] | 96 schizophrenic patients (34 violent arrests, 23 nonviolent arrest, 39 no arrest) | No significant differences between the groups in the WAIS, Wisconsin Card Sortig Test, Trail Making Test, Verbal fluency Test, Stroop Test, American National Adult Reading Test |
|
| Krakowski et al. [59] | 32 transiently violent schizophrenic patients, 27 persistently violent schizophrenic patients | No difference in the average performance and verbal IQ on the WAIS-R |
|
| Wong et al. [60] | 20 male schizophrenic patients who had committed several violent offenses, 19 male schizophrenic patients who had committed only 1 violent offense. | No difference in the WAIS performance between the groups |
|
| Silver et al. [61] | 35 violent patients with chronic schizophrenia or schizoaffective disorder, 35 nonviolent schizophrenic patients, 46 healthy controls | No difference between violent and nonviolent schizophrenic patients in the cognitive test battery |
|
| Fullam and Dolan [62] | 33 violent and 49 nonviolent male forensic inpatients with schizophrenia | No difference between violent and nonviolent schizophrenic patients in the cognitive test battery but lower IQ scores in the violent schizophrenic patients |
|
| Roy et al. [63] | 20 chronic, treatment-resistant inpatients with schizophrenia; (11 violent and 9 low-violent men) | Violent patients outperformed nonviolent patients on the verbal IQ, digit symbol test, block design |
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| Lapierre et al. [64] | 31 schizophrenic men (outpatients) and 30 healthy control subjects | Higher level of violence in the more cognitively functional individuals on the Wisconsin Card Sorting Test and Controlled Oral Word Association test |
|
| Rasmussen [65] | 13 inpatients aggressive schizophrenic patients from a maximum security psychiatric unit, 13 nonaggressive schizophrenic patients, 13 healthy controls | Violent schizophrenic patients outperformed nonviolent schizophrenic patients on the Trail Making
Test and showed faster reaction time on all reaction time tests but more failed inhibitions on the Go-NoGo test
|
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| Krakowski et al. [66] | 28 high, 27 low, and 34 nonviolent schizophrenic patients | High-violent patients were more impaired on the Benton Visual Retention Test, digit symbol test, block design and had lower performance IQ scores on the WAIS-R |
|
| Adams et al. [67] | 37 male schizophrenic patients | History of violent arrests but not inpatients violence was associated with impairment on the Luria Nebraska neuropsychological battery |
|
| Barkataki et al. [68] | 13 individuals with a history of serious violence and a diagnosis of antisocial personality disorder, 13 individuals with a history of violence and schizophrenia, 15 individuals with schizophrenia without a history of violent behaviour, 15 healthy control subjects | Violent schizophrenic patients had a higher number of errors in the Wisconsin Card Sorting Test |
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| Foster et al. [69] | 1 year prospective study of aggression in 23 male forensic psychiatric inpatients | Scores on Stroop Color Word Tasks, Judgment of Line Orientation Test, Symbol Digit Modalities Test only significantly predicted frequency but not severity |
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| Krakowski et al. [70] | 33 psychiatric violent inpatients versus 69 nonviolent psychiatric inpatients | History of community violence was related to impairment on some Wisconsin Card Sorting Subtests, finger tapping, Perdue pegboard |
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