Table 1.
Comparisons Between the Control and Psychopathic Groups on Demographic and Psychopathy Measures
| Control Group (n = 24) |
Psychopathic Group (n = 24) |
Statistic | P Value | |||
|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | |||
| Age | 29.2 | 6.1 | 32.7 | 6.8 | t = 1.8 | 0.07 |
| Ethnicity, % white | 50 | 46 | χ2= 0.08 | 0.77 | ||
| Whole brain volume | 1171.5 | 121.4 | 1712.3 | 183.4 | t =0.03 | 0.98 |
| Handedness, % right | 83.0 | 83.0 | χ2=0.00 | 1.00 | ||
| Psychopathy Scores | ||||||
| Total | 11.5 | 2.3 | 28.0 | 5.0 | t = 14.6 | <.001 |
| Factor 1 | 3.6 | 2.0 | 10.8 | 2.7 | t = 10.3 | <.001 |
| Factor 2 | 5.5 | 1.7 | 12.4 | 3.1 | t = 9.5 | <.001 |