The role of proactive and reactive aggression in the formation and development of boys' friendships.

This study tested the hypothesis that friends are more similar in proactive aggression than in reactive aggression. Interpersonal processes that may account for this similarity (i.e., selection and mutual influence) were also examined. In the fall and spring of the school year, the friendships of 185 4th-, 5th-, and 6th-grade boys were identified. Proactive and reactive aggressive behavior were assessed with a teacher-rating instrument for each boy. The results support the general hypothesis and suggest that proactively aggressive boys tend to select proactively aggressive peers as friends; however, mutual influence between stable friends does not appear to account for similarity. These findings are discussed within the framework of G. R. Patterson, J. B. Reid, and T. J. Dishion's (1992) theory of antisocial behavior. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The link between alcohol use and aggression toward sexual minorities: An event-based analysis.

The current study used an event-based assessment approach to examine the day-to-day relationship between heterosexual men's alcohol consumption and perpetration of aggression toward sexual minorities. Participants were 199 heterosexual drinking men between the ages of 18–30 who completed (1) separate timeline followback interviews to assess alcohol use and aggression toward sexual minorities during the past year, and (2) written self-report measures of risk factors for aggression toward sexual minorities. Results indicated that aggression toward sexual minorities was twice as likely on a day when drinking was reported than on nondrinking days, with over 80% of alcohol-related aggressive acts perpetrated within the group context. Patterns of alcohol use (i.e., number of drinking days, mean drinks per drinking day, number of heavy drinking days) were not associated with perpetration after controlling for demographic variables and pertinent risk factors. Results suggest that it is the acute effects of alcohol, and not men's patterns of alcohol consumption, that facilitate aggression toward sexual minorities. More importantly, these data are the first to support an event-based link between alcohol use and aggression toward sexual minorities (or any minority group), and provide the impetus for future research to examine risk factors and mechanisms for intoxicated aggression toward sexual minorities and other stigmatized groups. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Moderators and mediators of the stress-aggression relationship: Executive function and state anger.

The present study examined the effects of executive function (i.e., EF) and anger/hostility on the relationship between stress (across individual stress domains, as well as at the aggregate level) and aggression. Two independent groups of participants—a college sample and a low-income community sample—were administered a battery of self-report measures concerning the subjective experience of stress, aggressive behaviors, and feelings of state anger and hostility in the last month, along with a battery of well-validated neuropsychological tests of EF. Across both samples, the stress domains that demonstrated the strongest associations with aggression were those involving chronic strains of daily living (e.g., job, financial, health) versus interpersonal stressors (e.g., family, romantic). In the community sample, analyses also revealed a significant interaction between perceived stress (aggregated across domains) and EF in predicting aggressive behavior. Specifically, participants with relatively low EF abilities, across different EF processes, showed a stronger relationship between different domains of stress and aggression in the last month. Similar effects were demonstrated in the college sample, although the interaction was not significant. In both samples, experiences of anger and hostility in the last month mediated the relationship between perceived stress (aggregate) and aggressive behavior among those low, but not high, in EF. These findings highlight the importance of higher-order cognitive processes in regulating appropriate affective and behavioral responses across different types of individuals, particularly among those experiencing high levels of stress. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Anabolic-androgenic steroid exposure during adolescence and aggressive behavior in golden hamsters

Anabolic androgenic steroid (AAS) abuse by adolescents represents a significant health care risk due to the potential for long-term negative physical and psychological sequelae, including increased aggressive behavior. The current experiments examined the effects of AAS use in young male adolescent hamsters (Mesocricetus auratus) and their consequences on aggressive behavior. It was hypothesized that AAS administration during adolescence predisposes hamsters to heightened levels of aggressive behavior (i.e., offensive aggression). To test this hypothesis adolescent male hamsters were administered high doses of synthetic AAS to mimic a 'heavy use' self-administration regimen used by athletes. Immediately following the exposure to AAS hamsters were tested for aggressive behavior using a resident-intruder model. Animals treated with high doses of AAS during their adolescent development showed heightened measures of offensive aggression i.e., decreased latency to bite and increased total number of attacks and bites) during the test period, while measures of total activity (total contact time) between the animals remained unchanged. AAS-treated males did not differ in body weight from controls, suggesting that the increased aggression was not due to increased body mass. The results of this study show that exposure to AAS during adolescence facilitates aggressive response patterns, but does not alter body weight.     

Does distraction reduce the alcohol–aggression relation? A cognitive and behavioral test of the attention-allocation model.

Objective: This study provided the first direct test of the cognitive underpinnings of the attention-allocation model and attempted to replicate and extend past behavioral findings for this model as an explanation for alcohol-related aggression. Method: A diverse community sample (55% African American) of men (N = 159) between 21 and 35 years of age (M = 25.80) were randomly assigned to 1 of 2 beverage conditions (i.e., alcohol, no-alcohol control) and 1 of 2 distraction conditions (i.e., distraction, no-distraction). Following beverage consumption, participants were provoked via reception of electric shocks and a verbal insult from a fictitious male opponent. Participants' attention allocation to aggression words (i.e., aggression bias) and physical aggression were measured using a dot probe task and a shock-based aggression task, respectively. Results: Intoxicated men whose attention was distracted displayed significantly lower levels of aggression bias and enacted significantly less physical aggression than intoxicated men whose attention was not distracted. However, aggression bias did not account for the lower levels of alcohol-related aggression in the distraction, relative to the no-distraction, condition. Conclusions: These results replicated and extended past evidence that cognitive distraction is associated with lower levels of alcohol-related aggression in highly provoked males and provide the first known cognitive data to support the attentional processes posited by the attention-allocation model. Discussion focused on how these data inform intervention programming for alcohol-related aggression. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Implicit stereotyping in person judgment.

Three experiments demonstrated implicit gender stereotyping. A target's social category determined the use of previously primed stereotyped information, without Ss' awareness of such influence. After unscrambling sentences describing neutral or stereotyped behaviors about dependence or aggression, Ss evaluated a female or male target. Although ratings of female and male targets did not differ after exposure to neutral primes, Ss exposed to dependence primes rated a female target as more dependent than a male target who performed identical behaviors (Exp 1A). Likewise, Ss rated a male, but not a female, target as more aggressive after exposure to aggression primes compared with neutral primes (Exp 1B). Exp 2 replicated the implicit stereotyping effect and additionally showed no relationship between explicit memory for primes and judgment of target's dependence. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The displaced aggression questionnaire.

Previous measures of aggressive personality have focused on direct aggression (i.e., retaliation toward the provoking agent). An original self-report measure of trait displaced aggression is presented. Exploratory and confirmatory factor analyses provided support for a 3-factor conceptualization of the construct. These analyses identified an affective dimension (angry rumination), a cognitive dimension (revenge planning), and a behavioral dimension (general tendency to engage in displaced aggression). The trait measure demonstrated good internal consistency and test-retest reliability as well as convergent and discriminant construct validity. Unlike other related personality measures, trait displaced aggression significantly predicted indirect indicators of real-world displaced aggression (i.e., self-reported domestic abuse and road rage) as well as laboratory displaced aggression in 2 experiments. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Selective role of aggression in concept formation.

This experiment investigated how "Direction" in verbal problem solving is influenced by aggression. A Four-Word Problem (FWP) test was designed, consisting of: Set A, eliciting an aggressive or nonaggressive classification of equal conceptual quality; Set B, where the aggressive selection is inferior; and Set C where neither classification involves aggression. Rankings of aggressive behavior were obtained for the 75 Ss who were administered the FWP and a word association test. Thematic protocols were available for 57 Ss. Results were: (a) A positive relationship was found between rankings of aggression and "Difference Scores," i.e., the difference in selection of conceptually inferior classifications between Set B and Set C. (b) A positive relationship was obtained between Set A and aggression in the thematic data. (c) The word associations were found to be unrelated to Set A or the thematic material. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Contextual determinants of mothers' interventions in young children's peer interactions.

In this study, the role of context in mothers' interventions in their preschool children's peer relationship problems was investigated. Event theme (aggression, peer rebuff, or initiating play), the child's role in the event (actor or target), the child's age and sex, and the mother's emotional reaction were examined as predictors of the extent to which mothers (N = 71) said they would discuss peer relationships, encourage peer interaction, and use power assertion in response to a series of videotaped vignettes depicting common peer relationship problems. Mothers suggested using more discussion in aggressive situations and more encouragement in initiating play situations. Mothers said they would use more power assertion when the child was the actor (i.e., provocateur), rather than the target, in an aggressive situation. Findings are discussed in terms of (a) the importance of considering context in understanding how mothers intervene in their children's peer relationships and (b) the need to examine moderators of cross-contextual consistency in mothers' interventions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Victim reactions in aggressive erotic films as a factor in violence against women.

Investigated whether the behavioral characteristics of the people in erotic films and the nature of the targets available for aggression afterward can affect subsequent aggression. In Exp I, 80 male undergraduates were angered by a male or female confederate. They were then shown a neutral film or 1 of 3 erotic films. The erotic films differed in terms of their aggressive content (2 were aggressive and 1 was not) and the reactions of the female victim in the 2 aggressive films (positive vs negative). Ss were then allowed to aggress against the confederate via electric shock. Results indicated that films had no effect on male targets, whereas both types of aggressive erotic films increased aggression toward the females. In Exp II with 80 male Ss, the effects of the above films on nonangry viewers were investigated with only female confederates. Results indicate that angered Ss were more aggressive toward the female after viewing either aggressive erotic film but that only the positive-outcome aggressive film increased aggression in nonangered Ss. The theoretical and applied aspects of aggressive and nonaggressive erotica are discussed. (40 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Engagement in gender normative versus nonnormative forms of aggression: Links to social–psychological adjustment.

Although many important advances have been made in our understanding of childhood aggression in recent years, a significant limitation of prior studies has been the lack of attention to the possible moderating role of gender in the links between aggression and social–psychological adjustment. To address this issue, the author evaluated the adjustment status associated with engagement in gender normative versus gender nonnormative forms of aggression for both boys and girls. Indexes of social–psychological adjustment assessed included teacher and self-reports of internalizing and externalizing difficulties (N?=?1,166 children 9–12 years old). Results showed that children who engaged in gender nonnormative forms of aggression (i.e., overtly aggressive girls and relationally aggressive boys) were significantly more maladjusted than children who engaged in gender normative forms of aggression and children who were nonaggressive. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Examining Masculinity Norms, Problem Drinking, and Athletic Involvement as Predictors of Sexual Aggression in College Men.

Male sexual aggression toward women is a serious social problem, particularly on college campuses. In this study, college men's sexually aggressive behavior and rape myth acceptance were examined using conformity to 11 masculine norms and 2 variables previously linked to sexual aggression: problem drinking and athletic involvement. Results indicated that men who use alcohol problematically and conform to specific masculine norms (i.e., having power over women, being a playboy, disdaining gay men, being dominant, being violent, and taking risks) tended to endorse rape myths and report sexually aggressive behavior. Additionally, men who reported higher levels of problematic alcohol use and risk taking were more likely to report sexually aggressive behavior without endorsing rape myths. Implications and recommendations are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Relational and overt aggression in preschool.

This research was designed as an initial attempt to assess relational aggression in preschool-age children. Our goal was to develop reliable measures of relational aggression for young children and to use these instruments to address several important issues (e.g., the relation between this form of aggression and social–psychological adjustment). Results provide evidence that relationally aggressive behaviors appear in children's behavioral repertoires at relatively young ages, and that these behaviors can be reliably distinguished from overtly aggressive behaviors in preschool-age children. Further, findings indicate that preschool girls are significantly more relationally aggressive and less overtly aggressive than preschool boys. Finally, results show that relational aggression is significantly related to social–psychological maladjustment (e.g., peer rejection) for both boys and girls. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Perceptions of parenting as predictors of boys' sibling and peer relations

This study included 71 target boys (8 to 10 years), their siblings, and mothers to examine the relations among mothering, fathering, sibling aggression, and peer outcomes. Siblings whose mothers were known to be more rejecting were observed and reported to be more aggressive with one another than siblings whose mothers were less rejecting. Moreover, boys who experienced more aggressive sibling interactions were more likely to be nominated by their peers as being aggressive and were less accepted by their peers. Although fathering failed to evince a direct influence on sibling aggression, an indirect effect was evidenced in that less accepting fathering related to more rejecting mothering. It appeared that boys' aggressive experiences with their siblings mediated, in part, the association between maternal rejection and their peer aggression and that peer aggression was a mediating link between sibling aggression and boys' acceptance by their peers.     

The distinction between beliefs legitimizing aggression and deviant processing of social cues: Testing measurement validity and the hypothesis that biased processing mediates the effects of beliefs on aggression.

In 2 studies the authors examined knowledge and social information-processing mechanisms as 2 distinct sources of influence on child aggression. Data were collected from 387 boys and girls of diverse ethnicity in 3 successive years. In Study 1, confirmatory factor analyses demonstrated the discriminant validity of the knowledge construct of aggression beliefs and the processing constructs of hostile intent attributions, accessing of aggressive responses, and positive evaluation of aggressive outcomes. In Study 2, structural equation modeling analyses were used to test the mediation hypothesis that aggression beliefs would influence child aggression through the effects of deviant processing. A stronger belief that aggressive retaliation is acceptable predicted more deviant processing 1 year later and more aggression 2 years later. However, this latter effect was substantially accounted for by the intervening effects of deviant processing on aggression. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Interpersonal aggression and the Type A coronary-prone behavior pattern: A theoretical distinction and practical implications.

In Study 1, 85 male undergraduates were classified as Type A (coronary prone) or Type B (noncoronary prone) on the basis of scores on the Jenkins Activity Survey. Ss participated in a version of A. H. Buss's (1961) teacher–learner procedure that allowed the isolation of hostile from instrumental acts. Results indicate that a prior task frustration produced greater aggression by Type A's than Type B's, but only under conditions where the aggressive act could not affect a confederate's immediate performance (i.e., hostile aggression). Study 2 examined the representation of Type A's and Type B's among 20 women in treatment for child abuse, 20 women who were victims of spouse abuse, and 20 control women. Findings show that Type A's were more likely than Type B's to exhibit the extreme hostility found in child abuse. Both studies suggest that a lack of control may underlie the greater aggression displayed by Type A's and Type B's. (39 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Divalproex sodium for impulsive aggressive behavior in patients with personality disorder

OBJECTIVE: Divalproex sodium, an anticonvulsant and antimanic agent, has recently been studied for its antiaggressive effects in patients with brain injuries, dementia, and borderline personality disorder. Since patients with other personality disorders also exhibit impulsive aggressive behavior, we conducted a preliminary open-label trial of divalproex sodium as a treatment for irritability and aggression in patients with a variety of personality disorders. METHOD: Ten patients meeting DSM-IV criteria for at least one personality disorder were treated with divalproex sodium in an 8-week open clinical trial. All patients had failed a trial of a selective serotonin reuptake inhibitor (SSRI). Divalproex sodium was increased as tolerated using a flexible dosing schedule. Clinician ratings for impulsive aggressive behavior and irritability were made every 2 weeks using the modified Overt Aggression Scale (OAS-M). RESULTS: Six of 8 completers reported significant decreases in irritability (p = .003) and impulsive aggressive behavior (p = .019). For the entire sample, improvement on OAS-M irritability and overt aggression scores was noted by the end of 4 weeks and continued to occur through week 8. CONCLUSION: This study suggests that divalproex sodium is an effective treatment for impulsive aggressive behavior in some patients with personality disorder who fail to respond to other antiaggressive agents (i.e., SSRIs). Controlled studies are needed to determine which patients are most likely to benefit from divalproex sodium and to evaluate the differential effectiveness of various agents in reducing impulsive aggressive behavior.     

Does television violence cause aggression?

In a previous study 3rd graders who preferred violent TV programs were rated more aggressive in school by peers. In a 10-yr follow-up, 211 males and 216 females of the original 875 Ss were interviewed as to their television habits and again rated their peers on aggressive behavior. It was found that the violence of programs preferred by male 3rd graders was even more strongly related to aggression 10 yr. later. Cross-lagged correlations, partial correlations, and multiple regression indicate a probable causative influence of watching violent TV programs in early formative years on later aggression. Although TV violence was not the only cause of aggressive behavior, its effect was relatively independent and explained a larger proportion of variance than any other single factor studied, e.g., IQ, social status, ethnicity, and parental disharmony. (24 ref.) (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Parental factors in the sensitization and habituation of territorial aggression in the convict cichlid ( Cichlasoma nigrofasciatum).

In Exp I, 2 territorial pairs of convict cichlid fish per aquarium were observed over 12 days. Aggressive behavior waned, but there was considerable between-days variability that was linked to progression from one stage in the parental cycle to the next (i.e., from no spawn to eggs, to larvae, and to free-swimming fry). The size of territory increased as one or the other pair progressed to the next stage. In Exp II, aggression in isolated pairs was studied during progression through the parental cycle, with a short daily presentation of a conspecific used as the stimulus. This procedure permitted study of changes in aggression unconfounded by the habituation that occurred in Exp I. It was predicted from Exp I that aggression would show increases at each stage transition. The predictions were supported. In Exp III, pairs were allowed to progress into the parental cycle in visual isolation from each other. When the pairs satisfied the requirements of being at different stages in the cycle, they were allowed visual access to each other. The pair with the more advanced spawn was initially more aggressive, but the aggressive behaviors did habituate. Results support the general tenets of P. M. Groves and R. F. Thompson's (see record 1971-02046-001) dual-process theory of habituation. (20 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Facilitating effects of erotica on aggression against women.

To examine the effects of highly erotic stimuli on aggression against females, 60 male undergraduates were angered by a male or female confederate and exposed to an erotic film, an aggressive film, or a nonfilm condition. Ss were given 2 opportunities to aggress against the confederate. Both the aggressive and the erotic films increased aggression against both targets during the 1st and 2nd aggression opportunities; however, the erotic film facilitated aggression against the female target across the 2 aggression sessions. The processes operating to cause this increase are discussed in terms of reducing restraints against aggressive behavior and the specific cue value of erotic films. (33 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)