Table 1.
Means and standard deviations, and sex differences, for psychopathy variables.
| Measure | Total sample | Males | Females | t | df | d |
|---|---|---|---|---|---|---|
| PPI-R-SF Tot | 134.73 (23.96) | 141.76 (23.02) | 127.99 (22.89) | 17.45* | 3385 | 0.60 |
| PPI-R-SF FD | 53.71 (10.70) | 57.03 (10.36) | 50.51 (10.03) | 18.63* | 3385 | 0.64 |
| PPI-R-SF SCI | 64.10 (13.10) | 66.43 (12.78) | 61.87 (13.03) | 10.27* | 3385 | 0.35 |
| PPI-R-SF Cold | 16.92 (4.65) | 18.29 (4.68) | 15.60 (4.22) | 17.55* | 3385 | 0.60 |
PPI-SF-R, Psychopathic Personality Inventory-Revised, Short Form; Tot, Total score; FD, Fearless Dominance; SCI, Self-Centered Impulsivity; Cold, Coldheartedness.
For males, n = 1662, for females, n = 1736.
t is test statistic for sex differences on each psychopathy variable; d = Cohen's d, computed using the pooled standard deviation.
*
p < 0.01.