To Breed or not to Breed
Survival of the richest? Social status, fertility and social mobility in England 1541-1824
Nina Boberg-Fazlic, Paul Sharp & Jacob Weisdorf
European Review of Economic History, December 2011, Pages 365-392
Abstract:
We use data collected by the Cambridge Group to investigate and explain differences in fertility by socio-economic group in pre-industrial England. We find, in line with results presented by Greg Clark, that wealthier groups did indeed have higher fertility until the 1700s. We demonstrate that this had to do with earlier age at marriage for women. We then turn to the likely social and economic impact of this, considering Clark's hypothesis that ‘middle-class values' spread through English society prior to the Industrial Revolution. Through the construction of social mobility tables, we demonstrate that the children of the rich were indeed spreading through society, but they were small in number relative to poorer sections of society, and moreover the children of the poor were also entering the middle classes.
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Breaking the rules: Personal control increases women's direct relationship initiation
Jennifer MacGregor & Justin Cavallo
Journal of Social and Personal Relationships, September 2011, Pages 848-867
Abstract:
Previous research demonstrates a gender difference in the strategies that people use to initiate heterosexual romantic relationships, with men typically playing a more active role than women (Clark, Shaver, & Abrahams, 1999). The current research tests whether bolstering women's personal control can eliminate this prevalent gender difference. Across three studies, one correlational and two experimental, results revealed that when women's sense of personal control is heightened, they become just as willing as men to exert effort and to use direct strategies to initiate relationships. Our findings suggest that the gender difference in participation in the initiation process may be more malleable than previously thought and that feelings of personal control may underlie this gender divide.
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Uncommitted men match their risk taking to female preferences, while committed men do the opposite
Willem Frankenhuis & Johan Karremans
Journal of Experimental Social Psychology, forthcoming
Abstract:
Previous research shows that men are more risk prone than women; single men take more risks than men involved in a romantic relationship; and men increase their level of risk taking in the presence of observers. We extend the existing literature with two studies. Our first study demonstrates that romantically involved men take less risk in the presence of women to the extent that they are more committed to their current partner. No such effect occurs in the presence of males. Our second study is an experiment revealing that men's beliefs about women's attitudes about risk taking causally influence men's level of risk taking. We developed a new measure of risk-taking-the Marble Risk Task, reminiscent of the computerized Balloon Analogue Risk Task (Lejuez et al., 2002), but designed to measure risk-taking outside of the laboratory and with real financial stakes-to show that single men adjust their level of risk taking to match what they believe women find attractive. Men involved in a relationship did the opposite: they adjust their behavior to not match what they believe women consider attractive-possibly with the goal of relationship maintenance.
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Salivary Testosterone Levels in Men at a U.S. Sex Club
Michelle Escasa, Jacqueline Casey & Peter Gray
Archives of Sexual Behavior, October 2011, Pages 921-926
Abstract:
Vertebrate males commonly experience elevations in testosterone levels in response to sexual stimuli, such as presentation of a novel mating partner. Some previous human studies have shown that watching erotic movies increases testosterone levels in males although studies measuring testosterone changes during actual sexual intercourse or masturbation have yielded mixed results. Small sample sizes, "unnatural" lab-based settings, and invasive techniques may help account for mixed human findings. Here, we investigated salivary testosterone levels in men watching (n = 26) versus participating (n = 18) in sexual activity at a large U.S. sex club. The present study entailed minimally invasive sample collection (measuring testosterone in saliva), a naturalistic setting, and a larger number of subjects than previous work to test three hypotheses related to men's testosterone responses to sexual stimuli. Subjects averaged 40 years of age and participated between 11:00 pm and 2:10 am. Consistent with expectations, results revealed that testosterone levels increased 36% among men during a visit to the sex club, with the magnitude of testosterone change significantly greater among participants (72%) compared with observers (11%). Contrary to expectation, men's testosterone changes were unrelated to their age. These findings were generally consistent with vertebrate studies indicating elevated male testosterone in response to sexual stimuli, but also point out the importance of study context since participation in sexual behavior had a stronger effect on testosterone increases in this study but unlike some previous human lab-based studies.
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Intolerance of sexy peers: Intrasexual competition among women
Tracy Vaillancourt & Aanchal Sharma
Aggressive Behavior, November/December 2011, Pages 569-577
Abstract:
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.
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Margo Gardner, Anne Martin & Jeanne Brooks-Gunn
Journal of Research on Adolescence, forthcoming
Abstract:
In a sample of urban youth (N = 1,070), we examined the links between primary caregiver affect (i.e., warmth and hostility) and two measures of sexual behavior in adolescence - early sexual initiation and sex with multiple partners. We also examined the extent to which neighborhood disadvantage moderated associations between caregiver affect and adolescent sexual behavior. We found that caregiver hostility was positively associated with early sex and sex with multiple partners in neighborhoods characterized by high levels of disadvantage, but inversely associated with both sex outcomes in neighborhoods characterized by low levels of disadvantage. Caregiver warmth, on the other hand, was inversely associated with early sexual initiation and sex with multiple partners in all neighborhoods, regardless of neighborhood disadvantage.
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Casual Hookups to Formal Dates: Refining the Boundaries of the Sexual Double Standard
Julie Reid, Sinikka Elliott & Gretchen Webber
Gender & Society, October 2011, Pages 545-568
Abstract:
"Hooking up," a popular type of sexual behavior among college students, has become a pathway to dating relationships. Based on open-ended narratives written by 273 undergraduates, we analyze how students interpreted a vignette describing a heterosexual hookup followed by a sexless first date. In contrast to the sexual script which holds that women want relationships more than sex and men care about sex more than relationships, students generally accorded women sexual agency and desire in the hookup and validated men's post-hookup relationship interest. However, in explaining the sexless date, students typically reasoned the woman was being chaste and withholding sex to redeem her reputation whereas they often characterized the man's abstinence in terms of a pity date. The findings underscore the tenacity of gendered sexual scripts around heterosexual dates and hookups but also reveal fissures and contradictions that suggest some changes to the sexual double standard.
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The Efficacy and Safety of the Quadrivalent Human Papillomavirus 6/11/16/18 Vaccine Gardasil
Richard Haupt & Heather Sings
Journal of Adolescent Health, forthcoming
Abstract:
Human papillomavirus (HPV) infection causes cervical cancer, a significant portion of anal, genital, and oropharyngeal cancers, genital warts, and recurrent respiratory papillomatosis. In June 2006, a quadrivalent HPV-6/11/16/18 vaccine (Gardasil/Silgard) was licensed in the United States, and subsequently in the European Union (September 2006). It has since been approved in 121 countries, with >74 million doses distributed globally as of March 2011. As the incidence of HPV infection peaks 5-10 years after the onset of sexual activity, preadolescents and adolescents represent an appropriate target group to implement HPV vaccination programs so as to achieve the maximal public health benefit. In this article, we provide an overview of the prophylactic efficacy of the vaccine in young women who were found to be negative to at least one of the four vaccine HPV types, thus approximating sexually naive adolescents. Because adolescents are also at high risk for other infections which are preventable by currently available vaccines, the development of concurrent immunization strategies may lead to better compliance, thereby contributing to the overall goal of protection against preventable diseases. We also summarize concomitant administration studies with meningococcal, diphtheria, tetanus, and pertussis vaccines, which were conducted in adolescents aged 9-15 years. Prophylactic efficacy in other populations (males aged 16-26 years) is also summarized along with long-term safety and efficacy studies.
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Brendan Zietsch & Pekka Santtila
Animal Behaviour, forthcoming
Abstract:
The evolutionary basis of human female orgasm has been subject to furious scientific debate, which has recently intensified. Many adaptive explanations have been proposed, invoking functions from pair bonding and mate selection to sucking up sperm, but these have been attacked as being based on flawed logic and/or evidence. The popular alternative theory is that female orgasm is not adaptive and is only evolutionarily maintained as a by-product of ongoing selection on the male orgasm-ejaculation system. This theory has not been adequately tested. We tested one of its central tenets: that selection pressure on the male orgasm is partially transmitted to the female via a positive cross-sex correlation in orgasmic function (susceptibility to orgasm in response to sexual stimulation). Using questionnaire data from over 10 000 Finnish twins and siblings, we found significant genetic variation in both male and female orgasmic function, but no significant correlation between opposite-sex twins and siblings. This suggests that different genetic factors underlie male and female orgasmic function and that selection pressures on male orgasmic function do not act substantively on female orgasmic function. These results challenge the by-product theory of female orgasm.
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Age and Fertility: Can Women Wait until Their Early Thirties to Try for a First Birth?
John Mcdonald et al.
Journal of Biosocial Science, November 2011, Pages 685-700
Abstract:
Postponing the start of childbearing raises the question of fertility postponed versus fertility foregone. One of the limitations of previous studies of ‘How late can you wait?' is that any observed decline in the probability of conception with age could be due to a decline in fecundability with age or due to a decline in coital frequency with age or due to both factors. Using data from a multinational longitudinal study conducted to determine the daily probability of conception among healthy subjects, a discrete-time event history model with long-term survivors (sterile population) is used to study the relationship between age and fecundability for childless women, while controlling for the pattern of intercourse within a menstrual cycle. The findings suggest that women can wait until their early thirties to try for a first birth, providing that they are not already sterile, as the magnitude of the decline in fecundability is very modest and of little practical importance.
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The Evolutionary Armistice: Attachment Bonds Moderate the Function of Ovulatory Cycle Adaptations
Paul Eastwick & Eli Finkel
Personality and Social Psychology Bulletin, forthcoming
Abstract:
Natural selection modified the attachment-behavioral system to bond adult mating partners in early members of the genus Homo, thus facilitating increased investment, especially paternal investment, in offspring. Previously existing adaptations that fostered intersexual conflict (e.g., ovulatory adaptations) could have threatened attachment bonds; therefore, the attachment-behavioral system might have evolved the ability to mute or refocus such adaptations for the purpose of strengthening the bond. Two studies offer support for this prediction. Women who were strongly attached to their romantic partner revealed positive associations of fertility with reports of romantic physical intimacy, but these associations were negative among unbonded women. This moderational effect of attachment bond strength was robust beyond dispositional attachment anxiety and avoidance, relationship satisfaction, relationship commitment, and partner physical attractiveness, none of which revealed robust moderational effects. Findings highlight how researchers can use the timeline of hominid evolution (i.e., phylogeny) as a tool to complement functional, adaptationist hypotheses.
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Do women seek humorousness in men because it signals intelligence? A cross-cultural test
Glenn Weisfeld et al.
Humor - International Journal of Humor Research, October 2011, Pages 435-462
Abstract:
Miller has suggested that people seek humorousness in a mate because humor connotes intelligence, which would be valuable in a spouse. Since males tend to be the competing sex, men have been more strongly selected to be humorous. To test this notion, we explored the role of humor in marriage cross-culturally, in the United States, the United Kingdom, China, Turkey, and Russia. In the first four societies, husbands were perceived to make wives laugh more than the reverse, but wives were funnier in Russia. Spousal humorousness was associated with marital satisfaction in all cultures, especially the wife's satisfaction. Spousal humorousness was less consistently related to spousal intelligence than to some alternative possibilities: spousal kindness, dependability, and understanding. Furthermore, the relationship between these four variables and marital satisfaction was mediated by spousal humorousness. Humor is gratifying in other social contexts as well. Humorists may gain social credit by providing amusement, and may also use humor to gauge another's mood and to engender liking, perhaps especially in courtship and marriage. Spouses may also take humorousness as a sign of motivation to be amusing, kind, understanding, dependable - as a sign of commitment.
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"It's Like Doing Homework": Academic Achievement Discourse in Adolescent Girls' Fellatio Narratives
April Burns, Valerie Futch & Deborah Tolman
Sexuality Research and Social Policy, September 2011, Pages 239-251
Abstract:
Young women's narratives of their sexual experiences occur amid conflicting cultural discourses of risk, abstinence, and moral panic. Yet young women, as social actors, find ways to make meaning of their experiences through narrative. In this study, we focused on adolescent girls' (N = 98, age 12-17 years) narratives of their first experiences with oral sex. We document our unexpected findings of persistent discourses of performance which echo newly emergent academic achievement discourses. Burns and Torre (Feminism & Psychology 15(1):21-26, 2005) argue that an extreme and high stakes focus on individual academic achievement in schools impoverishes young minds through the "hollowing" of their sexualities. We present evidence that such influence also works in the opposite direction, with an achievement orientation invading girls' discourses of sexuality, "crowding out" possible narratives of pleasure, choice, and mutuality with narratives of competence and skill usually associated with achievement and schooling. We conclude with policy implications for the future development of "positive" sexuality narratives.
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From racial discrimination to risky sex: Prospective relations involving peers and parents
Megan Roberts et al.
Developmental Psychology, forthcoming
Abstract:
This study investigated how early experience with racial discrimination affected the subsequent risky sexual behaviors of a diverse sample of African American youths (N = 745). The analyses focused on 3 risk-promoting factors thought to mediate the hypothesized discrimination → risky sex relation: negative affect, affiliation with deviant peers, and favorable attitudes toward risky sex. In addition, attentive parenting was examined as a protective factor. Analyses using structural equation modeling revealed that youths who perceived more racial discrimination at age 10 or 11 were engaging in more sexual risk taking at age 18 or 19. This relation was mediated by the hypothesized risk-promoting factors via pathways that were consistent with our conceptual model. Results also indicated a prospective reciprocal relation between parenting and children's deviant affiliations: deviant peer affiliations at age 10 or 11 predicted more attentive parenting behaviors by the parents; this response from the parents, in turn, predicted relatively fewer deviant affiliations when the youths were 15 or 16. Study findings are discussed in terms of their relevance to the disproportionately high rates of sexually transmitted infections among African Americans.
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Has East Germany Overtaken West Germany? Recent Trends in Order-Specific Fertility
Joshua Goldstein & Michaela Kreyenfeld
Population and Development Review, September 2011, Pages 453-472
Abstract:
Some 20 years after reunification, the contrast between East and West Germany offers a natural experiment for studying the degree of persistence of Communist-era family patterns, the effects of economic change, and fertility postponement. After reunification, period fertility rates plummeted in the former East Germany to record low levels. Since the mid-1990s, however, period fertility rates have been rising in East Germany, in contrast to the nearly constant rates seen in the West. By 2008, the TFR of East Germany had overtaken that of the West. We explore why fertility in East Germany is higher than in West Germany, despite unfavorable economic circumstances in the East. We address this and related questions by (a) presenting an account of the persisting East/West differences in attitudes toward and constraints on childbearing, (b) conducting an order-specific fertility analysis of recent fertility trends, and (c) projecting completed fertility for the recent East and west German cohorts. In addition to using the Human Fertility Database, perinatal statistics allow us to calculate a tempo-corrected TFR for East and West Germany.
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Pilot test of an emotional education intervention component for sexual risk reduction
Rebecca Ferrer et al.
Health Psychology, September 2011, Pages 656-660
Objective: Emotions are key predictors of sexual risk behavior but have been largely ignored in theory-based intervention development. The present study aims to evaluate whether the addition of an emotional education intervention component to a traditional social-cognitive safer sex intervention increases intervention efficacy, compared with both a social-cognitive only intervention and a no intervention control condition.
Methods: Young adults were randomized in small groups to receive the social-cognitive-emotional (SCE) intervention, the social-cognitive (SC) intervention, or standard of care.
Results: Analyses of data from 176 participants indicated that intervention arms reported similar increased condom use compared with the no intervention control arm at 3 months' postintervention (β = .06, p = .41, d = 0.08). However, at 6 months' postintervention, individuals in the SCE intervention arm reported increased condom use compared with both the SC intervention (β = .27, p = .04, d = 0.38) and control arms (β = .37, p < .01; d = 0.56), demonstrating preliminary evidence that the addition of an emotional education component may facilitate sustained behavior change.
Conclusions: An emotional education intervention module has the potential to facilitate sustained behavior change at delayed follow-up. Additional research is necessary to replicate findings in a larger sample and to determine the mediators of emotional education intervention efficacy.
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Kristine Marceau et al.
Developmental Psychology, September 2011, Pages 1389-1409
Abstract:
Pubertal development is a nonlinear process progressing from prepubescent beginnings through biological, physical, and psychological changes to full sexual maturity. To tether theoretical concepts of puberty with sophisticated longitudinal, analytical models capable of articulating pubertal development more accurately, we used nonlinear mixed-effects models to describe both the timing and tempo of pubertal development in the sample of 364 White boys and 373 White girls measured across 6 years as part of the National Institute of Child Health and Human Development Study of Early Child Care and Youth Development. Individual differences in timing and tempo were extracted with models of logistic growth. Differential relations emerged for how boys' and girls' timing and tempo of development were related to physical characteristics (body mass index, height, and weight) and psychological outcomes (internalizing problems, externalizing problems, and risky sexual behavior). Timing and tempo are associated in boys but not girls. Pubertal timing and tempo are particularly important for predicting psychological outcomes in girls but only sparsely related to boys' psychological outcomes. Results highlight the importance of considering the nonlinear nature of puberty and expand the repertoire of possibilities for examining important aspects of how and when pubertal processes contribute to development.