Indirect peer aggression in adolescence and reproductive behavior

Evolutionary psychologists have suggested that indirect aggression during adolescence is a strategy to compete with same-sex peer rivals for resources, status, and mating opportunities. We collected survey data on 143 young adults to determine retrospectively, the amount of indirect aggressive behavior they perpetrated and the amount of indirect victimization they experienced in middle school and high school. We also collected information about reproductive opportunities such as age at first sexual intercourse and number of lifetime sex partners to determine whether aggression or victimization could be used to predict measures of reproductive opportunity. We performed a principal components analysis to develop factors from 16 aggression and victimization variables. Results indicate that females who reported indirect aggression toward peers had earlier ages at first sexual intercourse and females who were more victimized in adolescence experienced later ages at first sexual intercourse. We discuss these results in terms of intrasexual competition and evolutionary theory.     

Intrasexual peer aggression and dating behavior during adolescence: an evolutionary perspective

It has been suggested that the use of intrasexual aggression is a form of competition associated with reproductive opportunities. Here the authors investigated the relationship between retrospective dating and flirting behavior and peer aggression and victimization during middle and high school. Results indicate that the use of peer aggression was associated with adaptive dating outcomes in both sexes, whereas experiencing peer victimization was correlated with maladaptive dating behaviors among females only. Females who perpetrated high levels of indirect (i.e. nonphysical) aggression reported that they began dating at earlier ages in comparison to their peers, whereas aggressive males reported having more total dating partners. Experiencing female-female peer victimization was correlated with a later onset of dating behavior, more total dating partners, and less male flirtation while growing up. This report strengthens the connection between adolescent peer aggression and reproductive competition, suggesting a potential functionality to adolescent peer aggression in enhancing one's own mating opportunities at the expense of rivals.     

Evolutionary perspective on indirect victimization in adolescence: the role of attractiveness, dating and sexual behavior

We studied indirect victimization from an evolutionary perspective by examining links between this type of victimization and several indicators of attractiveness (past sexual behavior, dating frequency and physical appearance). Two thousand three hundred and nineteen (56% female) students (ages 13-18) from a region of southern Ontario, Canada, completed self-report measures of indirect victimization, physical appearance, dating frequency, recent sexual behavior (number of partners in previous month) and past sexual behavior (number of lifetime partners minus number of partners in previous month) as well as indexes of depression, aggression and attachment security, which were used to control for psychosocial maladjustment. Consistent with an evolutionary framework, physical appearance interacted significantly with gender, wherein attractive females were at greater risk for indirect victimization, whereas for males physical attractiveness was a protective factor, reducing risk of victimization. Physical appearance also interacted with grade, being inversely related to indirect victimization for younger adolescents and having a nonsignificant association with victimization for older youth. Finally, recent sexual behavior was associated with increased risk of indirect victimization for older adolescents only, which we discussed with regard to peer perceptions of promiscuity and short-term mating strategies. These findings have important implications for the development of interventions designed to reduce peer victimization, in that victims of indirect aggression may represent a rather broad, heterogeneous group, including attractive individuals with no obvious signs of maladjustment.     

Cyberbullying,cyber aggression,and cyber victimization in relation to adolescents’ dating and sexual behavior: An evolutionary perspective

This study examined adolescents’ cyberbullying, cyber aggression, and cyber victimization from an evolutionary perspective, extending previous research showing that traditional forms of bullying, aggression, and victimization are associated with reproductively relevant outcomes. Consistent with hypotheses based on theory and research linking bullying and aggression to intrasexual competition for mates, results indicated that cyber victimization was positively associated with a number of dating and sexual partners. Findings for cyber aggression were more complex, depending on the degree of cyber victimization experienced by the perpetrator, and the balance of power between the perpetrator and victim. Specifically, nonbullying cyber aggression by perpetrators with equal or less power than the victim had stronger positive relations with the number of dating or sexual partners when perpetrators experienced a high level of cyber victimhood. In contrast, cyberbullying by perpetrators with more power than the victim was negatively associated with the number of dating partners when the perpetrators’ exposure to cyber victimization was low. Although cyber aggression and cyber victimization are new forms of aggression that involve the use of modern electronic devices, the results of this study demonstrate the usefulness of viewing this behavior from an evolutionary perspective and show that adolescents are likely to use cyber aggression against rivals in the context of intrasexual competition for mates.     

Predicting dating behavior from aggression and self‐perceived social status in adolescence

We investigated the longitudinal associations between self‐reported aggression, self‐perceived social status, and dating in adolescence using an intrasexual competition theoretical framework. Participants consisted of 536 students in Grade 9 (age 15), recruited from a community sample, who were assessed on a yearly basis until they were in Grade 11 (age 17). Adolescents self‐reported their use of direct and indirect aggression, social status, and number of dating partners. A cross‐lagged panel model that controlled for within‐time covariance and across‐time stability while examining cross‐lagged pathways was used to analyze the data. The findings revealed that direct aggression did not predict dating behavior and was negatively associated with self‐perceived social status in Grade 10. Self‐perceived social status in Grade 9 was positively associated with greater use of indirect aggression in Grade 10. Regarding dating, in Grade 9, self‐perceived social status positively predicted more dating partners the following year, while in Grade 10, it was higher levels of indirect aggression that predicted greater dating activity the following year. Overall, there were no significant sex differences in the model. The study supports the utility of evolutionary psychological theory in explaining peer aggression, and suggests that although social status can increase dating opportunities, as adolescents mature, indirect aggression becomes the most successful and strategic means of competing intrasexually and gaining mating advantages.

     

Mean Girls: Provocative Clothing Leads to Intra-Sexual Competition between Females

This study aimed to investigate indirect aggression between females from an evolutionary perspective, considering indirect aggression as a mechanism of intra-sexual competition. Previous research suggests that females who are dressed provocatively, or appear ‘sexually available’, are more likely to be victims of indirect aggression from other females. Investigating this notion via an empirical measure and a word-selection task, this study involved a female confederate posing as a participant, who was dressed provocatively in one condition and conservatively in the other. Sixty-five females completed an intra-sexual competition scale and a word selection task in which they were able to select complimentary or derogatory phrases to describe the confederate. Making derogative comments is a common form of indirect aggression; therefore, those who selected derogatory phrases could be considered to be exhibiting indirect aggression. Consistent with our hypotheses, females in the provocative condition obtained significantly higher intra-sexual competition scores, selected more derogatory words, and less complimentary words than those in the conservative condition, indicating that females dressed provocatively are indirectly aggressed against to a greater extent than those that are not. This paper adds further support to the notion that indirect aggression is used by females as a method of intra-sexual competition, particularly towards provocatively dressed females.     

A multi-informant longitudinal study on the relationship between aggression, peer victimization, and dating status in adolescence

Adolescent peer-aggression has recently been considered from the evolutionary perspective of intrasexual competition for mates. We tested the hypothesis that peer-nominated physical aggression, indirect aggression, along with self-reported bullying behaviors at Time 1 would predict Time 2 dating status (one year later), and that Time 1 peer- and self-reported peer victimization would negatively predict Time 2 dating status. Participants were 310 adolescents who were in grades 6 through 9 (ages 11-14) at Time 1. Results showed that for both boys and girls, peer-nominated indirect aggression was predictive of dating one year later even when controlling for age, peer-rated attractiveness, and peer-perceived popularity, as well as initial dating status. For both sexes, self-reported peer victimization was negatively related to having a dating partner at Time 2. Findings are discussed within the framework of intrasexual competition.     

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 relation between scores on the Buss–Perry Aggression Questionnaire and aggressive acts,impulsiveness, competitiveness,dominance, and sexual jealousy

This paper examines the relation of the four subscales (physical, verbal, anger and hostility) of the Buss–Perry Aggression Questionnaire (BPAQ) to act‐based aggression questionnaires (involving same‐sex or partners as opponents, and direct or indirect aggression) and evolutionarily based predictors of aggression, using an online student sample. All aggression measures were moderately correlated with one another. The BPAQ physical and verbal scales were most closely related to act‐based measures of direct aggression to a same‐sex other and the hostility scale to indirect aggression to a same‐sex other. The evolutionary variables were less closely related to the BPAQ than were the act‐based measures. Dominance and sexual jealousy were predictors of BPAQ physical, verbal and anger, and impulsiveness was a significant predictor of anger. Aggr. Behav. 32:1–10, 2006. © 2006 Wiley‐Liss, Inc.     

Risk Factors of Sexual Aggression and Victimization Among Homosexual Men1

This study examined risk factors of sexual aggression and victimization among homosexual men (N= 310). They completed the Homosexual Experiences Survey to record sexual aggression and victimization and provided information about 2 groups of potential risk factors: childhood abuse and sexual lifestyle (number of partners, age at first intercourse, age at coming out, accepting or paying of money for sex, and rape proclivity). One in 4 respondents reported severe forms of sexual victimization; 17% reported moderate victimization. Prevalence of perpetration of sexual aggression was almost 20% for severe aggression and 9% for moderate aggression. The risk of victimization increased as a function of childhood abuse as well as high number of partners and acceptance of money for sex. The risk of committing sexual aggression was positively related to childhood abuse, acceptance and payment of money for sex, high number of sexual partners, and rape proclivity. The findings are discussed in relation to evidence on heterosexual aggression.     

Dating Violence Victimization,Dispositional Aggression,and Nonsuicidal Self‐Injury among Psychiatrically Hospitalized Male and Female Adolescents

The objective of the current study was to characterize the association between dating violence victimization and dispositional aggression in predicting nonsuicidal self‐injury (NSSI) among psychiatrically hospitalized male and female adolescents. One hundred fifty‐five adolescents (ages 13–17) and their parents completed the Schedule for Affective Disorders and Schizophrenia for School‐Age Children clinical interview to assess NSSI and child abuse; adolescents completed self‐report measures of aggression and dating violence victimization (verbal, physical, and sexual). Dating violence victimization and NSSI were found to be highly prevalent among both males and females in this psychiatric inpatient sample. Two moderational models were supported, wherein dating violence was associated with NSSI in the context of elevated trait anger in males and indirect aggression in females. Findings suggest that helping victims of dating violence acquire skills to address certain forms of dispositional aggression may attenuate NSSI.     

Intersexual aggression and male sexual activity in captive rhesus macaques

Rape has been posited to be an outgrowth of male reproductive strategies. Forced copulations may have evolved as a consequence of the low parental investment made by males in producing and raising offspring. We designed a laboratory experiment which paired rhesus macaque males with females in order to assess the influence of intersexual aggression on male sexual activity. Younger and older adult males had comparable levels of sexual behavior, but younger males were more aggressive towards females than were older males. In addition, females threatened younger males more than older males. Male attacks on females did not result in sexual intercourse. On the contrary, a negative correlation existed between male aggression towards females and male success at achieving intromissions. Female aggression towards males appeared to be an effective tactic which reduced the chances of sexual intercourse. We conclude that intersexual aggression acts either as a mechanism of dominance assertion or as a means to increase spatial distance between individuals. These data do not support the idea that rape in humans has an evolutionary foundation derived from male reproductive strategies.     

Early Predictors of Urban Adolescents’ Community Violence Exposure

This study examined the extent to which individual, peer, and family factors predicted the onset of community violence exposure in middle and high school, as well as the indirect effects of early factors. We were particularly interested in the timing of exposure to community violence during adolescence, and thus conducted survival analyses on data from 632 urban youth, followed from first grade through high school. Early aggressive behavior and poor academic readiness were associated with an earlier onset of community violence exposure in adolescence. The effects of early aggression on community violence exposure and victimization were accounted for, in part, by peer rejection and deviant peer affiliation; there was no evidence of moderation by gender or parental monitoring. Findings highlight potential targets for preventive interventions with youth at risk of community violence exposure.     

SEXUAL AGGRESSION AMONG ADOLESCENTS

This study examines the prevalence of sexual aggression among adolescents from both former East and West Germany. Koss and Oros'(1982) Sexual Experiences Survey (SES) was employed to measure sexual aggression (male version) and sexual victimization (female version). Almost 17% of female respondents reported forced sexual experiences that qualify as criminal offenses under German law. The total percentage including all forms of unwanted sexual contacts amounted to over 50%. Among male respondents, almost 15% admitted sexual behaviors that qualify as criminal offenses, with an overall rate of coercive sexual behaviors of over 44%. Token resistance and number of sexual partners were associated with a higher risk of sexual victimization in the female sample. Among male respondents, peer pressure, self-reported rape proclivity, anger, and disinhibition predicted sexually aggressive behaviors.     

Does bullying others at school lead to adult aggression? The roles of drinking and university participation during the transition to adulthood

This study uses a three‐wave longitudinal study of young Australians to identify developmental processes underlying the relationship between school bullying and physical aggression in early adulthood. The central question is whether and how drinking and participation in work or university study disrupt or entrench aggressive pathways from school bullying to adult aggression. Self‐report data were collected from 88 females and 63 males (N = 151) during childhood (age 10), adolescence (age 14), and early adulthood (age 20). Participants who bullied other students during childhood and adolescence, or during adolescence only, reported more physical aggression during early adulthood than those who never bullied. However, those who had bullied during adolescence only reported significantly higher adult aggression if they were also drinking at above‐average frequencies. Conversely, participation in university, compared to being in the workforce, was associated with significantly less adult aggression among the at‐risk groups. Findings suggest that particular contexts during early adulthood can offer youth on aggressive trajectories (as evidenced by bullying at school) unique opportunities to turn their behaviour around. Other contexts, however, may exacerbate aggressive behaviour patterns.     

Jealousy mediates the relationship between attractiveness comparison and females' indirect aggression

Indirect aggression is considered an evolutionarily adaptive mechanism that can improve female mating success. It has been hypothesized that indirect aggression toward romantic partners and peers is used more frequently by females who make appearance‐based comparisons and that these relationships are mediated by jealousy. Females (N = 528) currently in romantic relationships were surveyed. Results confirmed females who made more frequent appearance comparisons aggressed more often toward partners and peers. Low‐comparing females reported being more frequent targets of peer indirect aggression. Jealousy partially mediated the relationships between making frequent attractiveness comparisons and indirect aggression. Results are discussed as effort allocated toward deterring partner defection and fending off rivals, and the role of emotion as a motivational influence for aggression.     

Staying alive: evolution, culture, and women's intrasexual aggression

Females' tendency to place a high value on protecting their own lives enhanced their reproductive success in the environment of evolutionary adaptation because infant survival depended more upon maternal than on paternal care and defence. The evolved mechanism by which the costs of aggression (and other forms of risk taking) are weighted more heavily for females may be a lower threshold for fear in situations which pose a direct threat of bodily injury. Females' concern with personal survival also has implications for sex differences in dominance hierarchies because the risks associated with hierarchy formation in nonbonded exogamous females are not offset by increased reproductive success. Hence among females, disputes do not carry implications for status with them as they do among males, but are chiefly connected with the acquisition and defence of scarce resources. Consequently, female competition is more likely to take the form of indirect aggression or low-level direct combat than among males. Under patriarchy, men have held the power to propagate images and attributions which are favourable to the continuance of their control. Women's aggression has been viewed as a gender-incongruent aberration or dismissed as evidence of irrationality. These cultural interpretations have "enhanced" evolutionarily based sex differences by a process of imposition which stigmatises the expression of aggression by females and causes women to offer exculpatory (rather than justificatory) accounts of their own aggression.     

Patterns of Women’s Aggression Against Partners and Others: Broadening Our Understanding of Violence

Research on women's aggression typically focuses on relational aggression. However, the study of violence must include multiple forms of violence such as aggression against partners and non‐partner others, while also considering victimization experiences by partners and non‐partners. The focus of this study is the multiple experiences of violence (perpetration and victimization) of women who are incarcerated. Incarcerated women are likely to experience higher rates of both than women in community settings, but most will be released in a brief period of time. Using a random sample (N = 580) we conducted cluster analyses to identify five patterns of women's aggression. Clusters varied depending on the target/s of aggression (i.e., partner and/or others), and type of aggression (i.e., physical and/or intimidation). Multinomial logistic regression was performed to determine the relationship between women's membership in a perpetration cluster and their victimization. Victimization history was related to an increased risk of perpetrating aggression, and varied depending on the target and type of aggression. Our findings provide support that research and interventions addressing women's use of aggression must also address their victimization history. Furthermore, results indicate that for some women, aggression towards partners and others is related. Future research should investigate multiple forms of aggression.     

The Attribution of Date Rape: Observer's Attitudes and Sexual Experiences and The Dating Situation

This study investigated the effects of individual experience with sexual aggression/victimization, rape myth score and dating situational factors on rape attributions. A sample of 332 males and 323 females from a freshman-level class read one of three rape scenarios—a planned date with monetary investment, a planned dutch-treat date and an unplanned pick-up date. ANOVAS consisting of a 3 (scenarios) × 2 (above vs. below median on rape myth scale) × 5 (level of sexual aggression/victimization) were performed separately for each sex on four ratings of the rape scenario. Sexually aggressive males and males who agreed more with rape myths were less likely to perceive the scenarios as rape, blamed the victim more, perceived the victim as desiring intercourse and viewed the assailants' behavior as less violent. The dating situation did not affect their attributions. Females tended to rate a pick-up date scenario as rape more frequently than a date with monetary investment and females who agreed more with rape myths tended to blame the victim and perceive the victim as desiring intercourse. A female's previous experience of sexual victimization did not influence attributions. The results are interpreted within a social-cultural context for males and points to the role of situational factors in understanding date rape from the female/victim perspective.     

Rare male aggression directed toward females in a female‐dominated society: Baiting behavior in the spotted hyena

Spotted hyenas (Crocuta crocuta) are gregarious carnivores. The females are socially dominant to males, and adult males rarely direct aggression toward adult females. This study analyzed all cases in which adult immigrant males behaved aggressively toward adult females in a large population of free‐living hyenas in Kenya, observed for 11 years. Our goals were to describe the conditions under which male attacks on females occur, and address possible adaptive functions. Most aggression directed by adult immigrant males against females occurred when coalitions of two or more males attacked a single adult female, who typically responded by defending herself and fighting back. Male aggression against females frequently occurred at sites of ungulate kills, but males never behaved aggressively toward females over food, and all male attacks on females were unprovoked. Although no mounting or other copulatory behaviors ever occurred during or immediately after an attack, the number of male attacks on females peaked around the time of conception. Daily rates at which males attacked females did not vary with female social rank. However, daily attack rates did vary significantly with female reproductive state, and the highest rates of male attack on females were observed during the two stages of the reproductive cycle during which females were most likely to conceive litters. The adaptive significance of male aggression against females in this species remains unknown, but a tight association between male attacks on females and a female's time of conception provides strong evidence of some role for male aggression in hyena sexual behavior. In particular, our data are consistent with hypotheses suggesting that male aggression toward females in this species either serves to inform females about male fitness or represents sexual harassment. Aggr. Behav. 29:457–474, 2003. © 2003 Wiley‐Liss, Inc.