THE EFFECTS OF CONFLICT AND STRESS ON SEXUAL AND AGGRESSIVE BEHAVIOUR IN MALE MICE

LAGERSPETZ, K. & HYVARINEN, S. The effects of conflict and stress on sexual and aggressive behaviour in male mice. Scand. J. Psychol. , 1071, 12, 119–127. –A conflict consisting in a conditioned response performed in order to drink, coupled with electric shocks, did not affect aggressive and sexual behaviour in a neutral environment. Conditioning only or shocks only also did not have any effects. When tested in the shuttle box, the groups showed differences in behaviour. A generally higher level of activation was shown by the experimental groups. The results are discussed in terms of the concept of 'experimental neurosis'.     

THE EFFECTS OF SOCIALLY-INDUCED AGGRESSIVENESS OR NONAGGRESSIVENESS ON THE SEXUAL BEHAVIOUR OF INEXPERIENCED MALE MICE

H autojävi , S. & L agerspetz , K. The effects of socially-induced aggressiveness or nonaggressiveness on the sexual behaviour of inexperienced male mice. Scand. J. Psychol ., 1968, 9, 45–49.—High aggressiveness induced by repeated victories over another mouse was found to decrease sexual behaviour of male albino mice. Nonaggressiveness induced by defeats in fights did not affect the level of sexual activity as compared with that of the control animals.     

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.     

Sexuell übergriffiges und aggressives Verhalten im Kindesalter Einflüsse entwicklungsrelevanter Faktoren

During the last years increasing attention has been paid to young children and adolescents with sexual coercive behaviour. During the year 2007 altogether 232 boys and 30 girls under the age of 14 years were reported to the police because of sexual assaults. In NRW an increasing number of in- and out-patient institutions offers specific and unspecific treatment programs for these children. The major aim of our study, which is supported by the Ministry of Employment, Health and Social Affairs of the state of NRW, is to evaluate the wide range of different treatment programs and to find predictors for successful or difficult treatment outcomes. Furthermore we are interested in differences between children with sexual problem behaviour and children with exclusively aggressive problems. So far 23 institutions take part in our research project and our total sample currently consists of 75 boys between 9 - 15 years. A psychometric test battery is applied at the beginning of individual treatment. Our first results highlight differences in socio-demographic data between children with sexual coercive behaviour and children with exclusively aggressive behaviour problems. Compared to children with exclusively aggressive problem behaviour, children with sexual problem behaviour come more often from incomplete families with no male parent, have experienced more psychological and physical violence and have been more often victims of sexual abuse. Compared to children with exclusively aggressive behaviour problems they score significantly higher on the “Depression / Anxiety” scale of the SPS-J, although average T-scores for both groups are within the normal range. Regarding cognitive functioning there are no significant differences between both groups.     

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.     

Antecedents of sexual and non-sexual aggression in young Singaporean men

This study investigated factors that have previously been implicated in male sexual aggression towards women, using a structural equation modelling approach to assess their relative influence on sexually coercive behaviours in young Singaporean men. Variables were classified under three major headings: childhood experience, personality, and attitudes facilitating violence. Non-sexual aggression against women was included in order to investigate its relationship to sexual aggression as well as its own causal antecedents. Results suggest that sexual and non-sexual aggression have different antecedents, and confirm the primacy of sexual variables (sexual experience, child sexual abuse) as antecedents to sexual aggression. Contrary to the hypothesis that sexual aggression is primarily aggressive in motivation, belligerence exerted only indirect effects on sexual aggression. Attitudinal variables (e.g. attitudes supportive of sexual aggression) contributed modestly to sexual but not to non-sexual aggression. Antisociality exerted indirect effects on both sexual aggression (via sexual experience and acceptance of interpersonal violence) and on non-sexual aggression (via belligerence). Parental violence contributed exclusively to non-sexual aggression. Finally, some cross-cultural differences in sexually coercive behaviour are highlighted.     

CHANGES IN THE AGGRESSIVENESS OF MICE RESULTING FROM SELECTIVE BREEDING, LEARNING AND SOCIAL ISOLATION

LAGERSPETZ, K. M. J. & LAGERSPETZ, K. Y. H. Changes in the aggressiveness of mice resulting from selective breeding, learning and social isolation. Scand. J. Psychol. 1971, 12, 241–248.–Selective breeding for aggressiveness and non-aggressiveness in mice has now been going on for 19 generations. The aggressiveness score distributions of the males have not changed since the 7th generation. Socially naive male mice which had been living in isolation, had five encounters with submissive males, and five with receptive females. Learning of aggressive and sexual behaviour occurred in males of both the aggressive and the non-aggessive strain. When living in groups, the males of both strains show no aggressiveness towards a submissive opponent. Social isolation for 1–2 weeks greatly increases the aggressiveness level of the animals of the aggressive strain. The effects of grouping is interpreted as social learning of non-aggressive behaviour, the effect of isolation as return of the inter-individually variable aggressiveness level, determined by genetic variation and early experience. Some neurochemical findings are in agreement with the observed behavioural effects.     

Physical aggression: Effects of ethnicity of target and directionality of aggression

Physical aggression of members of a powerful majority ethnic group against an opponent either from a powerless and discriminated against minority or from their own group was tested as a function of aggression directionality and aggressor's attitudes. It was hypothesized that under bidirectional aggression where the opponent could aggress as well, members of the powerful majority group would adjust their aggressive responses to that of their opponent's regardless of his ethnic origin and regardless of aggressor's attitudes. However. under unidirectional aggression where the opponent was powerless, it was expected that those subjects who held unfavourable attitudes toward members of the minority group would be more aggressive against an opponent of that group than against an opponent of his own ethnic group. Subjects who had neutral attitudes would be equally aggressive toward all opponents. Ninety-six 11th grade vocational high school male students of Western origin, were given the opportunity to administer electric shocks to an opponent who was either of Western or Oriental origin in a competitive situation, Subjects were selected according to their attitudes toward Oriental Jews. Half expressed negative attitudes, the other half neutral attitudes. Half of the subjects expected their opponent to reciprocate shocks, the others did not. Contrary to expectations it was found that the attitudes of subjects of Western origin towards Orientals did not effect their aggressive behaviour. When aggression could not be reciprocated, all subjects were more aggressive toward an opponent of Oriental than of Western origin. The findings showed that when aggression was bidirectional, all subjects adjusted their aggressive behaviour, to their opponents'. However, they were less aggressive towards an opponent of Oriental than of Western origin.     

GENDER IDENTITY AND ADVERSARIAL SEXUAL BELIEFS AS PREDICTORS OF ATTITUDES TOWARD SEXUAL HARASSMENT

The present study replicates the work of Konrad and Gutek (1986) within a college sample and extends their work by examining the impact of gender identity and adversarial sexual beliefs as predictors of attitudes toward sexual harassment. One hundred seven college students indicated specific aspects of their direct experiences with sexual harassment and then completed several attitudinal measures. Endorsement of adversarial sexual beliefs and experience with sexual harassment significantly predicted negative (less tolerant) attitudes toward sexual harassment for male respondents. Strong gender group identity and the endorsement of adversarial sexual beliefs significantly predicted negative (less tolerant) attitudes toward sexual harassment for female students. Implications for the focus of intervention strategies within an academic environment are discussed.     

ESCAPE AS A FACTOR IN THE AGGRESSIVE BEHAVIOR OF TWO RETARDED CHILDREN

This study sought to identify some of the variables controlling the severely aggressive behavior of two retarded children. In Experiment 1, each child was presented with several demand and nondemand situations. Aggression was frequent in the demand situations and rare in the nondemand situations. When a stimulus correlated with the termination of demands was introduced, aggression fell to a near zero level. In Experiment 2, for one child, a variety of preferred reinforcers was introduced into the demand situation contingent on correct responding. Aggression abruptly decreased to a low level. Experiments 3 and 4 involved the second child. In Experiment 3, this child was permitted, in one condition, to leave the demand situation if he emitted a nonaggressive response. Aggression decreased to a low level. In Experiment 4, he was prevented, in one condition, from leaving the demand situation in spite of high levels of aggression. Aggression fell to a near zero level. In Experiments 3 and 4, he was permitted, in several conditions, to leave the demand situation following aggressive behavior. Aggression increased to a high level. The results suggested that: (1) aggression can sometimes function as an escape response; and (2) escape-motivated aggression can be controlled by: (a) introducing strongly preferred reinforcers to attenuate the aversiveness of the demand situation; (b) strengthening an alternative, nonaggressive escape response; or (c) using an escape-extinction procedure.     

GENETIC AND SOCIAL CAUSES OF AGGRESSIVE BEHAVIOUR IN MICE

L agerspetz , K irsti . Genetic and social causes of aggressive behaviour in mice. Scand. J. Psychol ., 1961, 2 , 167—-173.—Significant differences in the aggressiveness of mice selected for aggressiveness and non-aggressiveness have been found to occur in the 2nd and 3rd generation of selective breeding. In S _a, motor activity scores were significantly higher in mice of the aggressive than of the non-aggressive strain. Defecation and ambulation scores obtained both in a standardized open-field test and in connection with the aggression measurements showed that the S₃ descendants of the aggressive mice were emotionally less reactive than the members of the 3rd non-aggressive generation. Defeats tend to decrease, victories to increase the level of aggressiveness in mice, but the aggression scores tend to return to the original level after the termination of the experiments.     

THE SEXUAL DOUBLE STANDARD

To explore the operation of the sexual double standard, 111 men and 143 women evaluated either a male or female target, described in a fictitious interview as involved in either monogamous or multiple heterosexual relationships and depicted as engaged in either above average, average, or below average levels of sexual activity. Targets described as involved in multiple relationships or depicted as engaged in above average levels of sexual activity were evaluated less positively than targets in other conditions. Women presented as more sexually active were seen as more liberal and more assertive than other female targets. In this study the sexual double standard was not operating in the formation of overall evaluations of individuals, but it did exert influence on other judgments that people make about men and women.     

EFFECTS OF ALCOHOL INTOXICATION AND VICTIMIZATION HISTORY ON WOMEN'S SEXUAL ASSAULT RESISTANCE INTENTIONS: THE ROLE OF SECONDARY COGNITIVE APPRAISALS

This study used an experimental paradigm to investigate the role of secondary cognitive appraisals in women's sexual assault resistance and whether these appraisals mediated influences of alcohol and prior victimization. After consuming a beverage (control, placebo, moderate, or high dose), 351 women projected themselves into a simulated interaction with a sexually aggressive man. Four types of secondary appraisals (shock at the man's behavior, concern about his feelings, uncertainty in the situation, conflict about what to do) and three resistance strategies (assertive, polite, passive) were examined. Path modeling revealed that, as expected, intoxication and prior sexual victimization influenced secondary appraisals, which in turn influenced intended resistance. Prior adult sexual assault (ASA) and childhood sexual abuse (CSA) also had direct effects: ASA negatively predicted assertive resistance and CSA positively predicted passivity. Findings suggest that secondary appraisals are key targets for intervention to facilitate effective resistance, thereby reducing the risk of adult sexual victimization.     

The relationship between aggressive and sexual behavior in male mice: Effects of testosterone and parachlorophenylalanine

The purpose of this study was to clarify the connection between aggressive and sexual behavior with the aid of testosterone propionate (TP) and parachlorophenylalanine (PCPA). Previous studies have indicated that aggressive and sexual behavior are positively correlated, and it has been suggested that both behaviors are related to the level of general arousal. Testosterone has documented effects on both aggressive and sexual behavior. It has been hypothesized that these effects are due to an increased level of general arousal. If this is the case, aggressive and sexual behavior could be restored by administration of drugs excitating the central nervous system, e.g., PCPA. The present study examined the effects of TP and PCPA on aggressive and sexual behavior in gonadectomized male mice. Control animals were injected with sesame seed oil or saline. The level of aggressiveness was assessed by means of dyadic tests with gonad-intact male opponents. For the sexuality tests, a receptive female was placed in the home cage of the experimental male. The results showed that male mice injected with PCPA were more aggressive than the males of the other groups, while the TP-exposed males expressed the most sexual activity. Compared to the control group, the PCPA and TP groups were more active in both the aggression and the sexuality tests. These findings lend support to the hypothesis that the earlier documented correlations between aggressive and sexual behavior could be due to both behaviors being dependent on a certain level of general activation. Aggr. Behav. 24:367–377, 1998. © 1998 Wiley-Liss, Inc.     

PERCEPTIONS OF WOMEN'S SEXUAL INTEREST AND ACQUAINTANCE RAPE

Rape prevention and education efforts often focus on the need for clear communication regarding sexual intent between women and men. This approach is based on the underlying assumption that acquaintance rape is a relational issue resulting from miscommunication. Findings from two studies challenge that assumption. The first study demonstrates that men who self-report engaging in sexually aggressive behavior are significantly more likely to misperceive women's sexual intent than other men or women. The second study demonstrates that the cognitive, rather than affective, components of rape-supportive attitudes contribute to sexualized interpretations of women's behavior. Thus, it appears that the tendency to rely on miscommunication as a framework for understanding sexual assault may be deflecting attention from sexual overperceptions and the affectively based information processing among men who en-gage in sexually assaultive behavior.     

A LABORATORY ANALOGUE FOR THE STUDY OF PEER SEXUAL HARASSMENT

The purpose of this study was to develop a laboratory analogue for the study of peer sexual harassment, and to examine person and situational factors associated with male on female peer sexual harassment. One hundred twenty-two male participants were given the opportunity to tell jokes to a female confederate from a joke list that included sexually offensive jokes, as well as other types of jokes. Participants were exposed to either a sexist laboratory environment or a neutral laboratory environment during the study. Eighty percent of participants told at least one sexually offensive joke to a female confederate. Higher scores on a measure of adversarial sexual beliefs were associated with telling a greater number of sexually offensive jokes. The results suggest that the joke-telling analogue may be a useful means for laboratory explorations of person and situational factors associated with peer sexual harassment.     

PREDICTORS OF RESPONSES TO UNWANTED SEXUAL ATTENTION

Data were collected from 4,011 male and female university students, faculty, and staff regarding responses to unwanted sexual attention. Women and undergraduate students reported the highest incidence of unwanted sexual attention; most harassers were peers. Ignoring the behavior was the most common response, followed by avoiding the harasser and talking to others about the harassment. Harassment severity was the strongest predictor of responses, with more direct responses being made to more severe harassment. Bivariate correlational analyses suggested that unwanted sexual attention was rated as more distressing by women than by men, by faculty/staff than by students, by individuals with less tolerant attitudes toward harassment, and when the harasser was in a position of authority or when the harassment was of longer duration. In path analyses, only the relations between attitudes and responses were mediated by differences in perceived severity. The gender and status (i.e., student vs. faculty/staff) of the harassee, the duration of the harassment, and whether the harasser was in a position of authority had direct effects on responses not attributable to perceived severity. Implications for policy and future research are discussed.     

SEXUAL HARASSMENT

This study was designed to examine the impact of sexual harassment on Hong Kong Chinese women in the workplace and in college. Questionnaires assessing sexual harassment incidents experienced by self, perceived prevalence of sexual harassment in the organization, job or study satisfaction, and organizational commitment were completed by 77 female secretaries and 84 female college students in Hong Kong. Consistent with our hypotheses, personal experience of sexual harassment was found to be negatively associated with respondent satisfaction with their jobs or studies. However, these experiences were found to be unrelated to organizational commitment. In addition, most of the coping strategies adopted by the harassment victims tended to be nonassertive in nature. As one of the few systematic sexual harassment studies on Chinese working women and female students, we interpret our findings from an indigenous perspective and discuss both theoretical as well as applied implications for research in this area.     

IS SEXUAL ORIENTATION A MATTER OF CHOICE?

Ninety women in lesbian and heterosexual couples were compared on relationship values, views of same-gender and cross-gender intimate relationships, and perceived choice of sexual orientation. Both groups reported similar values, levels of self-esteem, and capacity for intimacy. The majority in both groups described their relationships with women as more emotionally and intellectually intimate than those with men. A majority of women in lesbian couples (58%) and a third of women in heterosexual couples reported choosing the orientation of their current sexual relationship. Women with male partners did not perceive major differences between homosexual and heterosexual relationships, citing sexual attraction as the primary reason they chose a male partner. In contrast, many women with female partners characterized lesbian relationships as more intimate and equal, and less gender-role stereotyped, frequently citing these characteristics, along with sexual attraction, as reasons for their relationship preference.