BMI,age, Mate Value,and Intrasexual Competition in Chilean Women

Attractiveness is the most important component of women intrasexual competition and it certainly has an impact in female’s perceived mate value (i.e., the value of an individual to the opposite sex as a potential mate). In the realm of intrasexual competition women are eager to emphasize their attractiveness and compete with rivals displaying these cues. Accordingly, age is an important feature of women’s appeal to the opposite sex; youth is highly valued by men, and is perceived by women as an important component of their attractiveness. Another trait that is a reliable cue of health and fertility is Body Mass Index (BMI). A large body of literature has associated BMI to female attractiveness. However, more information is necessary about the associations of BMI and age with mate value, and female intrasexual competition. In the present research we report two studies that examined the associations of BMI and age with estimates of self-perceived mate value and intrasexual competition in Chilean women (18–39 years). More specifically, we hypothesized inverse relationships of BMI and age with mate value (N?=?234), and intrasexual competition (N?=?308). We found partial support to our propositions. The results revealed inverse associations between BMI, mate value and mating success, but BMI with intrasexual competition were not related. In contrast, age had a strong and negative effect on intrasexual competition. We discuss our results within the framework of Evolutionary Psychology and consider the central role of attractiveness (estimated from BMI and age) in the mating strategies of women.     

An evolutionary psychology perspective on sex differences in exercise behaviors and motivations

Researchers have found that men and women pursue sex-appropriate strategies to attract mates. On the basis of intrasexual competition, men should be more likely to enact behaviors to look larger, whereas women should be more likely to enact behaviors to look smaller. The types of exercises that each performs should reflect this expectation. The present study replicates and extends work by L. Mealey (1997) on sex differences in exercise behavior. In the present study, male participants focused their energy on gaining muscle mass and enhancing their upper body definition, whereas female participants focused their energy on losing weight with emphasis on their lower body. Both sexes reported efforts to improve their abdominal region. It appears that men and women adopt sex-appropriate exercise behavior as a method of self-enhancement for intrasexual competition.     

The influence of facial masculinity and voice pitch on jealousy and perceptions of intrasexual rivalry

The assessment of same-sex individuals as intrasexual competitors may depend in part on the perceived mate value of potential rivals. Men’s and women’s preferences for vocal and facial masculinity suggest that feminine women and masculine men may be perceived as more threatening intrasexual competitors. We tested the influence of men’s and women’s vocal and facial masculinity on preferences for who should accompany romantic partners on a weekend trip and on jealousy in response to imagined flirting. We found that men and women preferred their partners to be accompanied by people who had less masculine/feminine voices, and were more jealous in response to people who had relatively more masculine/feminine voices. Women, but not men, rated faces with exaggerated sex-typical characteristics as undesirable travel companions for their romantic partners and reported more jealousy in response to imagined flirting from such faces. We also found that participants who rated masculine male and feminine female stimuli as more attractive also perceived such stimuli as greater intrasexual threats, demonstrating individual differences in competition-related social perceptions. Our findings indicate that perceptions related to intrasexual competition are related to cues to underlying mate quality, which may aid in effective mate guarding.     

The evolution of human intrasexual competition: tactics of mate attraction

Darwin's theory of sexual selection suggests that individuals compete with members of their own sex for reproductively relevant resources held by members of the opposite sex. Four empirical studies were conducted to identify tactics of intrasexual mate competition and to test four evolution-based hypotheses. A preliminary study yielded a taxonomy of tactics. Study 1 used close-friend observers to report performance frequencies of 23 tactics to test the hypotheses. Study 2 replicated Study 1's results by using a different data source and subject population. Study 3 provided an independent test of the hypotheses in assessing the perceived effectiveness of each tactic for male and female actors. Although the basic hypotheses were supported across all three studies, there were several predictive failures and unanticipated findings. Discussion centers on the heuristic as well as predictive role of evolutionary theory, and on implications for other arenas of intrasexual competition.     

Courtship, competition, and the pursuit of attractiveness: mating goals facilitate health-related risk taking and strategic risk suppression in women

Two experiments explored the possibility that specific health risks observed among young women may be influenced by attractiveness-enhancement goals associated with mating. Study 1 (n=257) demonstrated that priming women with intersexual courtship and intrasexual competition increased their willingness to go tanning and take dangerous diet pills. Study 2 (n=148) conceptually replicated these results and revealed that increased willingness to take these risks is mediated by diminished feelings of vulnerability to the negative health effects associated with these behaviors when mating goals are salient. Findings provide evidence that mating goals play a role in the continued popularity of these dangerous behaviors in women. Furthermore, the current results bridge the existing gap between health belief and self-presentational models of risk behaviors to yield novel insights into the psychology of risk taking.     

女大学生同性竞争与社交网站发布美化自拍行为的关系：外貌比较的调节作用

为探究女大学生同性竞争与社交网站发布美化自拍行为之间的关系及外貌比较在其中的调节作用,采用同性竞争量表、身体外貌比较问卷和美化自拍量表对463名女大学生进行问卷调查。结果发现：在控制年龄后,女大学生同性竞争可以显著正向预测社交网站美化自拍行为,且这一预测作用受到外貌比较的调节,即只有低外貌比较的女大学生其同性竞争水平可显著预测其美化自拍行为。该结果对理解和干预女大学生的社交网站行为具有一定理论意义和实践意义。     

Sex and contextual effects on children's use of interference competition

Prior research with children and nonhuman animals suggests that females engage in interference competition, in which I individual reduces another's chances of gaining access to a resource, only when resources are scarce, whereas males use it more widely. This study was designed to compare males' and females' use of interference competition in games in which resources were scarce or plentiful. Forty groups of 4 same-sex children from kindergarten or Grade 4 played the 2 games on 2 days. Grade 4 girls used less interference competition when resources were plentiful than when they were scarce. Results are useful for generating a contextually based model of the development of sex differences in competitive behavior.     

Intolerance of sexy peers: intrasexual competition among women

Intrasexual competition among males of different species, including humans, is well documented. Among females, far less is known. Recent nonexperimental studies suggest that women are intolerant of attractive females and use indirect aggression to derogate potential rivals. In Study 1, an experimental design was used to test the evolutionary-based hypothesis that women would be intolerant of sexy women and would censure those who seem to make sex too readily available. Results provide strong empirical support for intrasexual competition among women. Using independent raters, blind to condition, we found that almost all women were rated as reacting negatively ("bitchy") to an attractive female confederate when she was dressed in a sexually provocative manner. In contrast, when she was dressed conservatively, the same confederate was barely noticed by the participants. In Study 2, an experimental design was used to assess whether the sexy female confederate from Study 1 was viewed as a sexual rival by women. Results indicated that as hypothesized, women did not want to introduce her to their boyfriend, allow him to spend time alone with her, or be friends with her. Findings from both studies are discussed in terms of evolutionary theory.     

The influence of relationship status, mate seeking, and sex on intrasexual competition

Researchers have little explored individuals' perceptions of same-sex attractiveness in terms of the influence of relationship status. By using intrasexual competition as a conceptual framework, the authors predicted that romantically involved individuals would protect their relationship by derogating competitors. Although previous researchers have strongly predicted this result, in the present study the relationship status had a negligible impact on competition, for which relationship commitment, sociosexual orientation, and self-monitoring did not account. Also, among uninvolved individuals, the authors expected those individuals seeking mates would use competitor derogation more than would those individuals not seeking mates, but there was no significant difference. Finally, because the vehicle for this investigation was attractiveness, an area in which women compete, the authors proposed that women would derogate more fiercely than would men. However, the results did not support this hypothesis either. The authors discuss future directions for research.     

Women and AIDS: Implications for Counseling

Women's concerns regarding AIDS have been ignored or minimized by most writers and AIDS educators. Although women may share many similarities with men in their reactions to AIDS, they have unique concerns that must be recognized. Understanding these concerns is essential for counselors in order to give quality care to women at risk for infection. This article describes women at risk and offers suggestions for counselors in working with such women.     

A sufficiently political orthodox conception of human rights

The traditional conception of human rights, or the orthodox conception (OC), has, over the last few years, been vigorously challenged by the political conception (PC) of human rights. I have two main aims in this paper: the first is to articulate and evaluate the main points of disagreement between the OC and the PC in order to provide a clearer picture of what is at stake in the debate. The second is to argue that the OC has the resources to respond to the PC's most challenging criticism; namely that it is not sufficiently political.     

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.     

Investor's Pessimistic and False Belief About Trustworthiness and Stake Size in Trust Decision1

Trust is a vital element of any society. Previous studies using trust games have provided insight into understandings of trusting behavior. However, investors' behaviors can be confounded by their risk preferences in the game, and little is known about the relationship between stake size and beliefs of others' good intentions underlying trust. We thus used a variant of the trust game and conducted two experiments to examine how stake size affects investors' beliefs about receivers' trustworthiness, with model-based analyses. We showed that, when holding all else equal, investors trusted more, but their expectations of reciprocation declined as stake size increased. However, actual receivers' reciprocation rates showed the opposite trend to investors' pessimistic beliefs. Furthermore, following previous studies in social psychology, we hypothesized that investors' social preferences (social value orientation) moderated the beliefs underlying trust, but they had no explanatory powers in investors' expectations of reciprocation. These results suggest that peoples' naive beliefs about stake size play a more important role in trust decisions than expected.     

Decisions of Identity: Feminist Subjects and Grammars of Sexuality

While Sarah Hoagland's conception of a lesbian ethic offers a promising route toward articulating an ethics of resistance, her notion of self in community does not provide a conception of “subject” capable of both embracing political action as fundamental to personal life and explicitly recognizing cultural, ethnic, and sexual multiplicity as central to ethical decision-making. Such a notion can be found, however, in the remarks of later Wittgenstein concerning the “language games” of describing.     

影响博弈结果的方法效应研究

最后通谍博弈和独裁者博弈是实验经济学的经典博弈,也被心理学家用来研究人的公平和利他行为。该研究考查了经济学和心理学通常的报酬支付方式、博弈中待分配的金额是否影响博弈结果,以及两个博弈进行组内实验时是否会产生顺序效应。结果发现支付方式和金额不影响博弈结果,但有顺序效应产生。该研究对国内研究者进一步借用这两个博弈的相关研究打下了一定的方法学基础。     

Distributive judgments under uncertainty: Paccioli's game revisited

Many decision biases arise from the inability to ignore past events. The coherence of decisions is also compromised by the inability to fully use information related to the future. In Paccioli's game, a stake of money goes to the first player to score a certain number of wins. When the game is prematurely interrupted, they may divide the stake according to the proportions of wins relative to rounds played. Alternatively, they may assess the probability that a player would reach the criterion number of wins first if the game were continued. The first decision rule (ratio), which is past-oriented, leads to contradictions across games. The second rule (probability), which is future-oriented, does not. In seven studies, use of the ratio rule emerges across testing methods, in games of chance and games of skill, and independently of extraneous factors (such as random responding, lack of awareness, or proneness to other past-oriented biases).     

Effect of conspecific sex on aggression during pregnancy and lactation in golden hamsters

The effect of conspecific sex on maternal aggression in hamsters was determined by comparing the frequency of aggressive responses by dams continuously housed with either a virgin male or female cagemate during pregnancy and lactation. Dams easily established aggressive dominance over male cagemates soon after pairing, and their aggression was low thereafter for the duration of pregnancy and lactation. The aggression of dams with females, on the other hand, tended to fluctuate with highs during mid pregnancy and mid lactation and lows around birth. When dam aggression was low around birth, female cagemates frequently became aggressively dominant, and several dams lost their litters. The higher aggression of dams toward females than males is probably a reflection of greater intrasexual competition for environmental resources that includes pups.     

女性生理周期与修饰行为的关系

众所周知, 与男性相比, 女性偏爱修饰。通过修饰行为, 提升自身吸引力具有普遍的社会意义。近年来, 一些研究者将女性修饰行为与繁殖目的联系起来, 认为女性修饰行为受到生理周期(主要是排卵期和安全期)的影响。具体而言, 排卵期时, 女性的修饰行为会增强, 缘于同性竞争, 包括竞争资源及配偶; 黄体期时, 启动异性吸引动机也会显著增强女性的修饰动机, 目的可能是保持“异性”对自己及后代的持续“投资”。总之, 上述观点为女性持续存在的、对修饰行为的关注提供了生物学解释。     

Social aggression and resource conflict across the female life-course in the Bolivian Amazon

This work explores sources of conflict among forager-horticulturalist women in Amazonian Bolivia, and applies life history theory as a tool for understanding competitive and cooperative social networking behaviors among women. In this study, 121 Tsimane women and girls were interviewed regarding current and past disagreements with others in their community to identify categories of contested resources that instigate interpersonal conflicts, often resulting in incidences of social aggression. Analysis of frequency data on quarrels (N = 334) reveals that women target several diverse categories of resources, with social types appearing as frequently as food and mates. It was also found that the focus of women's competition changes throughout the life-course, consistent with the notion that current vs. future reproduction and quantity-quality trade-offs might have different influences on competition and social conflict over resources within women's social networks across different age groups.