Table 1.
Demographics, personality and task behavior
| Violent offenders | Healthy controls | P value | |
|---|---|---|---|
| Number of subjects | 18 | 26 | |
| Age, years | 31.8 ± 8.8 | 29.6 ± 9.2 | 0.4 |
| Duration of education, years | 8.9 ± 2.6 | 11.6 ± 0.8 | 0.0004 |
| IQ, RIST score | 99.1 ± 8.1 | 108.9 ± 6.9 | 0.0003 |
| Number of violent convictions | 3.7 ± 2.4 | None | |
| Number of violent charges against | 16.4 ± 30.2 | None | |
| Age at first violent conviction, years | 19.5 ±4.3 | n/a | |
| Personality traits | |||
| Trait aggressiona | 87.1 ± 22.2 | 54.3 ± 15.9 | 0.00009 |
| Trait angerb | 21.0 ± 6.8 | 14.6 ± 2.3 | 0.001 |
| Trait impulsivityc | 66.7 ± 10.0 | 60.9 ± 9.4 | 0.07 |
| PSAP behavior | |||
| Option 1 | 2283.6 ± 378.9 | 2476.0 ± 276.6 | 0.08 |
| Option 2 | 150.0 ± 98.0 | 84.0 ± 95.2 | 0.03 |
| Option 3 | 175.0 ± 11.5 | 258.4 ± 94.4 | 0.01 |
| Total button presses | 2608.6 ± 304.8 | 2818.4 ±170.7 | 0.01 |
| Provocations | 10.6 ± 1.6 | 10.2 ± 2.0 | 0.5 |
| Points earned | 12.1 ± 3.4 | 14.3 ± 3.2 | 0.04 |
| Option 2 per provocation | 14.5 ± 9.5 | 8.7 ± 9.9 | 0.06 |
RIST, Reynolds Intellectual Screening Test; IQ, intelligence quotient; PCL-R, psychopathy checklist revised. P values represent two-sample t-tests.
a
Buss–Perry Aggression Questionnaire total score.
b
State-Trait Anger Expression Inventory, Trait Anger Scale total score (n = 40).
c
Barratt’s Impulsiveness Scale Version 11 total score.