Effects of type and dose of alcohol on human physical aggression.

Forty male undergraduates over 21 years of age were provoked following their ingestion of either 1.5 ounces (.045 1) or .5 ounces (.015 1) of 100 proof bourbon or vodka per 40 (18 kg) of body weight. The expression of physical aggression was related to the quantity of alcohol ingested. The high dose of alcohol appeared to instigate and the low dose of alcohol appeared to inhibit aggressive responding. This effect was most pronounced in the vodka conditions. Interpersonal judgments were also influenced by the type and dose of alcohol consumed.     

Alcohol expectancies, alcohol use, and hostility as longitudinal predictors of alcohol-related aggression

The direct and interactive effects of alcohol expectancies for aggression, dispositional hostility, and heavy alcohol consumption on alcohol-related physical aggression were examined across the first four years of marriage in a sample of 634 newlywed couples. For husbands, alcohol aggression expectancies predicted increases in alcohol-related aggression; across husbands and wives, however, aggression expectancies were not found to interact with hostility or alcohol consumption to predict physical aggression. Consistent with previous research, hostility and alcohol consumption interacted with each other to predict alcohol-related aggression. Specifically, for both husbands and wives high in dispositional hostility, heavy alcohol consumption was positively associated with the occurrence of alcohol-related aggression; for those low in dispositional hostility, however, there was no association between alcohol consumption and alcohol-related aggression. Findings are contrasted with previous longitudinal research on alcohol aggression expectancies and physical aggression in married couples. The article discusses the extent to which findings may vary depending on whether expectancies are assessed in relation to alcohol's effect on one's own behavior versus alcohol's effect on others' behavior.     

The effects of alcohol and the salience of aggressive cues on triggered displaced aggression

Alcohol increases the aggression-augmenting effects of provocation. Theories of alcohol and aggression suggest that impaired cognitive processing induced by acute intoxication leads individuals to process aggression-inducing social cues differently depending on whether they are high or low in salience. We examined the effects of intoxication and aggressive cue salience within the triggered displaced aggression paradigm. An ethnically diverse sample of 74 primarily young adult participants (40 men and 34 women; M=23.28, SD=3.14 years) were recruited from the university community and surrounding area. All participants were provoked by an experimenter, randomly assigned to a 2 (alcohol condition: alcohol vs. placebo) x 2 (trigger salience: high vs. low salience) between-subjects design, and then given the opportunity to aggress against the undeserving triggering agent. As expected, intoxication combined with a salient triggering cue elicited the most displaced aggression among all conditions. These results provide the first evidence that the effect of alcohol on triggered displaced aggression is moderated by the salience of the triggering event.     

The neural correlates of alcohol-related aggression

Alcohol intoxication is implicated in approximately half of all violent crimes. Over the past several decades, numerous theories have been proposed to account for the influence of alcohol on aggression. Nearly all of these theories imply that altered functioning in the prefrontal cortex is a proximal cause. In the present functional magnetic resonance imaging (fMRI) experiment, 50 healthy young men consumed either a low dose of alcohol or a placebo and completed an aggression paradigm against provocative and nonprovocative opponents. Provocation did not affect neural responses. However, relative to sober participants, during acts of aggression, intoxicated participants showed decreased activity in the prefrontal cortex, caudate, and ventral striatum, but heightened activation in the hippocampus. Among intoxicated participants, but not among sober participants, aggressive behavior was positively correlated with activation in the medial and dorsolateral prefrontal cortex. These results support theories that posit a role for prefrontal cortical dysfunction as an important factor in intoxicated aggression.     

The influence of beverage type on aggression in males in the natural setting

Laboratory research has shown that alcohol and aggression are related and that the consumption of distilled as opposed to brewed beverages results in more aggression. A field experiment was conducted in which confederates approached 38 males who had been drinking only brewed or only distilled beverages, and asked them four annoying questions. Responses were recorded, transcribed and rated using a rank ordered scoring method. Results confirmed the prediction of more aggressive responses from the distilled beverage consuming group but findings failed to show a dose effect. The results demonstrate the viability and value of field research in this area and help to elucidate the role of alcohol in aggression.     

Alcohol‐aggression expectancies and dispositional aggression moderate the relationship between alcohol consumption and alcohol‐related violence

Alcohol consumption increases aggression, but only in some drinkers. This study examines how expectancies for alcohol‐induced aggression and dispositional aggression moderate the link between alcohol consumption and alcohol‐related violence, building on previous studies that have employed limited measures of alcohol‐related violence and included few women. A sample of 212 men and women reported their alcohol consumption, alcohol‐aggression expectancies, dispositional aggression, and incidents of alcohol‐related aggressive acts. Alcohol‐aggression expectancies and quantity of alcohol consumed interacted to predict alcohol‐related aggression. Alcohol‐aggression expectancies covaried with alcohol‐related aggressive acts, particularly in heavier drinkers. Dispositional aggression also correlated with alcohol‐related aggression among heavier drinkers. These results help identify that alcohol might increase aggression only among heavy drinkers who expect alcohol to increase aggression or who are dispositionally aggressive. Aggr. Behav. 32:517–527, 2006. © 2006 Wiley‐Liss, Inc.     

Power of being present: the role of mindfulness on the relation between men's alcohol use and sexual aggression toward intimate partners

The primary aim of this investigation was to examine the association between men's level of mindfulness and histories of alcohol consumption and sexual aggression toward intimate partners. Participants were 167 heterosexual drinking males who completed self‐report measures of mindfulness, frequency and quantity of alcohol consumption during the past 12 months and sexual aggression against intimate partners during the past 12 months. Results indicated that a history of consuming larger amounts when drinking was associated with more frequent sexual coercion/aggression among men who reported low, but not high, levels of mindfulness. However, drinking more frequently by itself was not associated with more frequent sexual coercion/aggression. These results support the attention‐allocation model and suggest implications for future intervention research aimed at reducing alcohol‐related aggression. Aggr. Behav. 36:405–413, 2010. © 2010 Wiley‐Liss, Inc.     

The effect of alcohol administration on human timing: a comparison of prospective timing, retrospective timing and passage of time judgements

Previous research suggests that human timing may be affected by alcohol administration. The current study aimed to expand on previous research by examining the effect of alcohol on prospective timing, retrospective timing and passage of time judgements. A blind between-subjects design was employed in which participants were either administered 0 g of alcohol per kilogramme of body weight (placebo), 0.4 g/kg (low dose) or 0.6 g/kg (high dose). Participants completed four types of temporal task; verbal estimation and temporal generalisation, a retrospective timing task and a passage of time judgement task. A high dose of alcohol resulted in overestimations of duration relative to the low dose and placebo group in the verbal estimation task. A high dose of alcohol was also associated with time passing more quickly than normal. Alcohol had no effect on retrospective judgements. The results suggest that a high dose of alcohol increases internal clock speed leading to over-estimations of duration on prospective timing tasks, and the sensation of time passing more quickly than normal. The absence of an effect of alcohol on retrospective timing supports the suggestion that retrospective judgements are not based on the output of an internal clock.     

Alcohol and Male Acceptance of Sexual Aggression: The Role of Perceptual Ambiguity1

The present study assessed the effects of drinking and behavioral ambiguity on perceptions of sexual aggression. Male participants, randomly assigned to 1 of 4 alcohol conditions (low, moderate, placebo, or control) viewed a videotaped interaction involving a couple meeting before a blind date. In the receptive condition, the female was friendly and excited. In the nonreceptive condition, she showed rigid posture and lacked enthusiasm. Participants then judged the acceptability of sexual aggression against the female and the attribution of the female's responsibility. Findings indicated a significant interaction such that in the receptive condition, higher alcohol doses elicited both greater acceptance of sexual aggression and greater attribution of female responsibility. There was no impact of alcohol dosage in the nonreceptive condition.     

Trait displaced aggression and psychopathy differentially moderate the effects of acute alcohol intoxication and rumination on triggered displaced aggression

When angered, alcohol and rumination increase aggression toward the source of a subsequent minor annoyance. Little is known about individual differences that moderate this phenomenon. One hundred university students (47 men, 53 women) were provoked and given either alcohol or placebo and subsequently induced to ruminate or engage in distraction. Participants were then given the opportunity to aggress against a somewhat annoying fictitious participant by determining the amount of hot sauce the other participant must consume. Alcohol and rumination independently augmented aggressive behavior, and these effects were moderated by trait displaced aggression and psychopathy, respectively. These findings suggest alcohol use and rumination as targets of intervention, specifically for those high in trait displaced aggression and psychopathy.     

Police Perceptions of Alcohol Intoxication

The accuracy of police perceptions of alcohol intoxication was assessed by comparing officers' impressions of intoxication with quantitative Breathalyzer measurements of blood alcohol concentration (BAC). Eighteen police officers predicted the BACs of 36 students who had consumed either a high or low dosage of alcohol. Results indicated that the officers could not discriminate between students who had consumed either the high or low alcohol dosage. More specifically, the officers were reasonably accurate in their predictions of students in the low alcohol condition, but they strongly underestimated the degree of intoxication of students in the high dose condition.     

Men's likelihood of sexual aggression: the influence of alcohol,sexual arousal,and violent pornography

Previous research findings have indicated that both alcohol intoxication and violent pornography exposure may contribute to increased sexual aggression by men. This study used an experimental paradigm to examine the effects of a moderate alcohol dose, alcohol‐related beliefs, and victim response on men's self‐reported likelihood of committing sexual aggression. A community sample of male social drinkers (N=84) participated in an experiment in which they read an eroticized rape depiction after completing an alcohol administration protocol. The stimulus story varied whether the victim, who initially expressed unwillingness to engage in sexual activity, expressed pleasure or distress in response to the man physically forcing her to perform several explicit sex acts. A path analytic model illustrated that participants' self‐reported likelihood of behaving like the sexual aggressor in the story was directly related to their own sexual arousal. Heightened sexual arousal was reported by participants who had consumed alcohol, those who read the victim‐pleasure story, and those who believed that drinking women are sexually vulnerable. Results suggest that sexual arousal to violent pornography, as influenced by acute alcohol intoxication and other factors, may be an important component of men's perceptions of their own sexual aggression likelihood. Aggr. Behav. 32:581–589, 2006. © 2006 Wiley‐Liss, Inc.     

Alcohol Reverses Religion's Prosocial Influence on Aggression

The relationship between religion and violence is controversial. Discrepant findings exist between survey studies and the limited number of experimental investigations of religiosity's influence on aggressive behavior. We have attempted to resolve this discrepancy by addressing previous limitations in the literature and assessing a heretofore‐untested moderator of religiosity and aggression: alcohol intoxication. This investigation included a community sample of 251 men and 269 women randomly assigned to either an acute alcohol intoxication condition or a placebo condition. Participants completed a series of questions drawn from standardized instruments of religiosity and spirituality prior to competing on an aggression laboratory paradigm in which electric shocks were received from, and administered to, a fictitious opponent under the guise of a competitive reaction‐time task. Hierarchical regression analyses revealed a significant beverage‐by‐religiosity interaction. Religiosity predicted lower levels of aggression for participants in the placebo group and higher levels of aggression for intoxicated participants. Results indicated that high religiosity coupled with alcohol intoxication may be a risk factor for aggression. This novel finding may help to clarify previous discrepancies in studies of religiosity and aggression.     

Factors Predicting Dating Violence Perpetration Among Male and Female College Students

This study examined the importance of witnessing parental violence, experiencing childhood violence, problems with alcohol, length of relationship, relationship satisfaction, anger management skills, and partner's use of physical and psychological aggression for male and female perpetrators of dating violence in college. For males, partner's use of physical aggression, low anger management skills, and high relationship satisfaction were the strongest predictors of physical aggression. For females, partner's uses of physical and psychological aggression were the most important predictors of their use of physical aggression. The model in this study was a good predictor of male violence, accounting for 81% of the variance; however, it only accounted for 51% of the variance in female violence.     

Aggressive disposition,alcohol, and aggression

This study investigated the effect of aggressive disposition on intoxicated and non-intoxicated aggressive behavior. Prior aggressiveness was measured with a structured questionnaire. Based on a bipartite split of scores, 28 subjects were assigned to the high aggressor group, and 29 to the low aggressor group. Subjects in both disposition groups were then randomly assigned to either a drunk or sober condition, and participated in a competitive reaction time task involving the administering and receiving of electric shocks to/from a fictitious opponent under conditions of high and low provocation. Aggression was defined as shock level intensity delivered to the sham opponent. When highly provoked, sober high aggressors were significantly more aggressive than low aggressors, thus validating the measure of aggressive disposition. When intoxicated, highly provoked individuals in both the high and low aggressive disposition groups attained equal levels of aggression. It was low aggressors who responded to escalated provocation with a significant increase in aggression responding when intoxicated. These results lend support to the notion that a pharmacological effect of alcohol can increase aggressive behaviour. Aggr. Behav. 23:11–18, 1997. © 1997 Wiley-Liss, Inc.     

The control of alcohol-related aggression: Redirecting the inebriate's attention to socially appropriate conduct

Forty male undergraduates ingested either a high dose of alcohol or a placebo, and were either provided with a nonaggressive norm or not, prior to being provoked by an opponent during a competitive reaction time task. Aggression was assessed by the intensity of shocks administered by the subject to the bogus opponent. Results suggest that the provision of an explicit nonaggressive norm enabled highly intoxicated subjects to moderate their aggressive responding even in a highly competitive situation. These findings are discussed in terms of current cognitive disruption models of alcohol-related aggression which assume intoxicated persons are unable to process information concerning appropriate standards of conduct.     

Failure to Consider Future Consequences Increases the Effects of Alcohol on Aggression

The failure to consider the future consequences of one's behavior is a major risk factor for aggression. Aggressive people tend to act first, and think later. Some people focus on the -here and now rather than on the future, a tendency measured by the Consideration of Future Consequences (CFC) scale (Strathman, Gleicher, Boninger, & Edwards, 1994). Alcohol intoxication is a neuro-biological variable that produces similar effects. Participants in the present experiment completed the CFC scale and then consumed either an alcohol or a placebo beverage. Next, they competed against a same-sex ostensible partner on an interpersonally adversarial competitive task in which the winner could administer electric shocks to the loser (the aggression measure). As expected, aggression was highest in intoxicated persons with low CFC scores. Being unconcerned about the future consequences of one's actions, in conjunction with acute alcohol intoxication, combine in a pernicious manner to increase aggression.     

攻击性初中生的类别转变：潜在转变分析

研究采用潜在转变分析探讨了攻击性初中生的类别转变。276名初中参加了为期一年的短期纵向追踪研究,在一年中分两次报告了自己的攻击行为。用潜在转变模型分析了初二到初三时青少年的攻击类别转变,结果表明初中生有三种攻击模式。研究以潜在转变模型进一步探究了这三种攻击模式的变化,结果发现两种模式具有很强的稳定性,不同模式之间也有一定程度的转变。最后,研究探讨了攻击类别转变的影响因素,结果表明性别与友谊质量可以起到显著作用。针对实际意义,文章最后进行了讨论和总结。