At the movies with Buss and Durkee: A natural experiment on film violence

Research on the effects of violence depicted in films shown in movie theatres has been neglected, although there are reasons to believe such presentations may be particularly salient for the viewer. In the present study, adult movie-goers attending commercial showings of a violent or non-violent movie responded to a questionnaire consisting of two scales of the Buss-Durkee aggression inventory, either before or after viewing the film. No sex differences in response were observed. The audience attending the violent film had significantly higher aggression scores than the audience attending the nonviolent film, both before and after viewing. Also, those attending the violent film showed a significant increase in aggression scores, while those at the non-violent film did not. The results demonstrate that audiences who attend violent films have an initially higher level of aggressivity which is heightened after exposure to the violent film. Thus, in order to achieve ecological validity in research on film violence, the characteristics of the audience normally exposed to such films must be taken into consideration. The results also provide support for the hypothesis that attendance at a violent film promotes aggressive tendencies.     

Hormonal,anthropometrical, and behavioral correlates of physical aggression in !Kung San men of Namibia

Differences in physical aggression among 114 male !Kung San (bushmen) from Namibia were investigated with regard to sex hormone levels, body dimensions, consumption of alcohol, and degree of acculturation. Subjects were classified from injuries resulting from prior conflicts with mutual physical aggression between the opponents as either violent or nonviolent. The comparison of mean sex hormone values (total serum testosterone, T_ser; serum 5α-dihydrotestosterone, DHT; serum estradiol 17β, E₂; “free,” non-SHBG-bound salivary testosterone, T_sal) and hormone ratios (T_sal/T_ser; DHT/T_ser) did not yield any significant differences between the violent and nonviolent group. However, correlation coefficients of sex hormone levels with the frequency of violent behavior within the group of physically aggressive San men were significantly positive for DHT, T_sal, and T_sal/T_ser (P < .05) while T_ser, E₂, and DHT/T_ser showed only weak positive correlations. Moreover, the violent men exhibit higher mean values in certain measures of physical robustness which may point to a possible pathway of indirect androgen action on human aggression. When the probands were classified according to their drinking habits, usually abstinent men had shown significantly less violent behavior in the past than men who habitually consume alcohol.     

Serum testosterone,cortisol, glucose,and ethanol in males arrested for spouse abuse

Concentrations of ethanol, testosterone, cortisol, and glucose were determined in serum obtained from 16 males taken into police custody after incidents of spouse abuse. The mean blood ethanol level at the time of arrest was 33.3 ± 2.6 mM. Serum testosterone levels were significantly lower and cortisol levels higher at the time of police intervention (within 1 hour of the incident) compared to control data collected later from the subjects when sober. Offenders did not differ from a group of nonviolent pub patrons at similar blood ethanol levels (35.9 ± 4.5 mM) with respect to serum testosterone, cortisol, or glucose, but their sober state cortisol and glucose concentrations were significantly higher compared to a control group of nonalcoholic men. Intoxication or acute hormonal changes were thus not specifically associated with violent behaviour. Provocative cues, however, may have been more frequent in the offender families, as Straus Conflict Tactics data showed that offenders and victims resorted to verbal aggression significantly more often than control families. The significantly elevated cortisol and glucose concentrations in offenders when sober compared to nonviolent controls could be viewed as direct effects of life stress, or as indirect effects of stress mediated by learned escape drinking. Excessive drinking as well as spouse abuse could be maladaptive coping strategies that principally serve to maintain the status quo, physiologically as well as psychologically. © 1992 Wiley-Liss, Inc.     

Intergenerational transmission of violent behavior in adolescent males

The purpose of this study was to examine the intergenerational influence of experiencing parental violence on the expression of violent behavior in adolescent males and to attempt to assess the importance of psychological mechanisms in this transmission. Sixty-five consecutive male admissions to a Young Offenders Unit and 25 male high school boys were administered the Minnesota Multiphasic Personality Inventory (MMPI), the Culture-Free-Self-Esteem Inventory, an intelligence test, and a violence questionnaire. Violent behavior in adolescence was found to be associated with experiencing paternal violence. This transmission was also found to be associated with higher levels of psychotic symptomatology. Violent behavior in adolescence was not found to be associated with maternal violence experienced or parental violence witnessed or with low self-esteem, externalizing defences, or internalizing defences. © 1992 Wiley-Liss, Inc.     

Women's aggression in heterosexual conflicts

Using a longitudinal design, prior experience with violence as a victim and opportunity to aggress were examined as predictors of college women's verbal and physical aggression toward romantic partners. Five additional categories of predictors identified in previous research (experienced and witnessed parental aggression during childhood, attitudes accepting of aggression, aggressive/impulsive personality attributes, psychopathology, and prior use of aggression) were also examined. Blockwise hierarchical regression analyses were performed to reveal the best predictors of verbal and physical aggression during the first year of college. Significant predictors of verbal aggression were prior use of verbal aggression in heterosexual conflicts during adolescence, witnessed parental aggression, level of adolescent sexual victimization, being a target of rational conflict strategies during adolescence, and use of physical aggression in romantic adolescent relationships, as well as self-reported verbal aggression as an index of personality, weak emotional ties, number of sexual partners, and approval of sexual intimacy in many types of relationships. Significant predictors of physical aggression were prior use of physical aggression during adolescence, witnessing and experiencing parental aggression, being a victim of physical aggression in adolescent romantic relationships, weak emotional ties, low levels of alcohol/drug use, and opportunity to aggress. A developmental model of aggression in which childhood experiences with family violence contribute to the likelihood of subsequent involvement in relationship violence seems appropriate. Past experience with aggression may be particularly important for women. Cultural expectations about women's roles do not provide the social support for female aggression that is provided for male aggression. Adolescent sexual victimizations and general involvement in conflictual relationships (as target and perpetrator) predicted subsequent verbal aggression, whereas experiencing family violence and sustaining physical aggression in romantic relationships predicted subsequent physical aggression. © 1994 Wiley-Liss, Inc.     

The effects of alcohol and persuasive social pressure on human physical aggression

Intoxicated and nonintoxicated subjects were given the opportunity to administer electric shocks to a nonprovocative opponent within the context of a competitive reaction time task. Social pressure was used to persuade subjects to administer a highly noxious electric shock to the passive opponent. The social pressure manipulation significantly increased the intoxicated subjects' use of the highly noxious shock. Non-intoxicated subjects did not evidence an appreciable increase in the use of the intense shock option.     

Differential reactions of men and women to realism,physical damage,and emotionality in violent films

Community college students rated brief segments of violence from films selected to represent a variety of approaches to the depiction of violence. Men and women differed substantially on these sequences, men seeing them as more enjoyable, amusing, realistic, and emotional. Men also showed less inclination to restrict showing of such sequences to children, on television, or by X-rating. While no sex differences appeared in ratings of suffering or overall appraisals of violence, women' enjoyment ratings declined precipitously for the films rated as depicting more suffering, while those of men did not. However, both men and women saw more violence in sequences emphasizing suffering of characters, even when this ran counter to actual physical damage depicted. For men, enjoyment of these violent media excerpts and self-reports of recent physical violence were essentially unrelated, while women showed highly significant positive relations for the two variables. These findings suggest that the dynamics of violence for men and women may be different enough to make differential analysis by sex an especially productive research tactic.     

Low blood glucose nadir in the glucose tolerance test and homicidal spouse abuse

The purpose of the study was to investigate whether homicidal spouse abuse offenders with a low blood glucose nadir in glucose tolerance test (GTT) showed more instances of repeated and severe aggression and criminality than counterparts with more normal GTTs. An attempt was also made to determine whether personality profiles on the Minnesota Multiphasic Personality Inventory (MMPI) differentiated between the groups. Altogether, 60 male homicidal offenders were studied. Those with low values had been repeatedly violent and impulsive under the influence of alcohol in relationships but also outside the home. The homicidal act usually occurred under the influence of alcohol with no clear recollection. These offenders had normal MMPI but some of them showed motor restlessness and irritability during the GTTs. The possible connections with enhanced glucose and abnormal brain serotonin metabolism among habitually violent and impulsive offenders are discussed.     

The dyadic interaction of persons with violent and nonviolent histories

College students were classified as having violent or nonviolent histories on the basis of their responses to the Conflict Tactics Scale (CTS). Four groups of heterosexual pairs were then recalled for further testing: violent males paired with violent females, violent males with nonviolent females, nonviolent males with violent females, and nonviolent males with nonviolent females. These pairs were asked to role play their attempt to resolve an hypothetical conflict while being videotaped. Subsequently, their behavior was recorded into the three summary categories that emcompass the Marital Interaction Coding System. Persons with violent histories were more frequently negative than those with nonviolent histories while interacting with an individual having a similar history. This result supports the validity of the CTS by demonstrating that it is capable of predicting behavior during the verbal resolution of a conflict. However, the results suggested that the nature of the contribution to the aversiveness of the interaction may be different for males and females. Overall, these results offer some support for the notion that some individuals learn aversive behavior as a general behavioral style for controlling their environments with the probability of performing coercive behavior partially a function of other individuals.