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Testosterone levels were examined in prisoners convicted of violent crimes (n = 13), in men previously convicted of violent crimes but currently not in prison (n = 15), in nonviolent alcoholics (n = 15), and in randomly selected control males (n = 16). Morning, afternoon, and evening testosterone levels were assessed after a minimum alcohol abstinence period of 24 hr. Violent and nonviolent men did not differ in plasma total testosterone level on any sampling occasion. In violent men, however, testosterone levels were significantly correlated with hostility, as measured by the Derogatis Symptom Check List. Most violent men were diagnosed with Antisocial Personality Disorder (ASP) [DSM-III-R; 301.70], and the unweighted ASP symptom count also correlated significantly with testosterone levels in these subjects. We suggest that individuals whose life histories involve numerous antisocial behaviors tend to have high testosterone levels even when interpersonal violence is excluded. This, however, does not eliminate the possibility that males who are characterized by high hostility may also have elevated testosterone levels. Violent predisposition and antisocial conduct beginning in early adolescence predict adult aggressive behaviors, which are augmented by power-related alcohol expectancies and alcohol abuse. Aggr. Behav. 25:113-123, 1999.

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BACKGROUND: Previous findings suggest that cognitive factors and expectancies related to drinking can mediate subjective sexual arousal as well as aggression in men. Our aim was to investigate the drinking habits and alcohol-related expectancies that might predispose men to sexually aggress in two groups of sexual offenders. METHOD: Men convicted of rape (n = 10) were compared with men convicted of child molesting (n = 10) and with control subjects (n = 31). Current drinking habits (while not in prison) were assessed by self-report, and the extent of alcohol abuse was mapped by the Michigan Alcoholism Screening Test (MAST; Selzer, 1971). Cognitive expectancies related to alcohol use were explored by the standard Alcohol Expectancy Questionnaire (AEQ; Brown et al., 1980). RESULTS: The majority of the men who committed rape (70%) but only a third of the men convicted of child molesting were diagnosed with antisocial personality disorder. Alcohol abuse was common in men convicted of both rape and child molesting and the men convicted of rape expected significantly more positive effects from drinking than the control group. Both sex offender groups were the only groups to express significant alcohol-related cognitive expectancies linked to arousal and aggression. Expectancy patterns were directly linked to the antisocial personality characteristics. CONCLUSION: Alcohol abuse is common in men who commit both rape and child molesting. Heavy drinking and the anticipation of alcohol effects such as sexual enhancement, arousal and aggression may facilitate sexual aggression in offenders with antisocial personality disorder.

Male attitudes and behaviours related to imagined sexual aggression were investigated in 99 Finnish men (mean age 24.3 years). Structural equation modelling suggested that imagined sexual aggression was directly predicted by hostile masculine ideologies and past antisocial acts, and indirectly by subject age (hostile masculinity decreased with age). For more detailed analyses of age effects on attitudes, the subjects were split into an older and a younger group. A small group of incarcerated rapists (n = 8; mean age 33.4 years) was included for comparative purposes; these were similar in age to the older group (n = 34; mean age 31.5 years) and were given the same attitude items. The younger men and the rapists expressed significantly more hostility toward women and acceptance of rape myths, and had a higher likelihood of committing rape than older men. Although younger men accepted interpersonal violence and sexual dominance, their attitudes were not necessarily reflected in past sexually aggressive behaviours, as they were in the rapists who differed from the younger men mainly in terms of their past antisocial activities.