Identified
Ethan Mereish
Psychology of Sexual Orientation and Gender Diversity, forthcoming
Abstract:
Lesbian women are at higher risk for obesity than heterosexual women. Yet, there is a dearth in research examining mechanisms that predict obesity among lesbian women. As one form of sexual minority stress, this study examined heterosexist discrimination as a mechanism in predicting risk for being overweight or obese, while accounting for factors usually associated with obesity. An online sample of adult lesbian women (N = 155) was recruited. Participants reported their demographics and health behaviors; they also completed measures assessing depression and heterosexist discrimination. Multinomial logistic regression analyses were used to examine risk for being overweight or obese. While accounting for age, race, education, income, health background and behaviors (i.e., having high blood cholesterol, exercising, and eating fatty foods), and depression, lesbian women who experienced heterosexist discrimination were at 2.55 higher odds of being overweight and at 2.49 higher odds of being obese when compared to normal-weight lesbian women. The findings indicate that experiencing heterosexist discrimination is related to higher risk for being overweight or obese. These results provide support for the effects of sexual minority stress on health and expand the minority stress model to include physical health. Understanding risk factors for obesity among lesbian women is critical for culturally sensitive and affirmative interventions, clinical practice, research, and policy.
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Margaret Rosario et al.
Psychology of Addictive Behaviors, forthcoming
Abstract:
More lesbian, gay, and bisexual (LGB) youths than heterosexuals report substance use. We examined a theoretical model to understand these disparities in lifetime and past-year substance use by means of stress and attachment paradigms, using the longitudinal Growing Up Today Study (GUTS) and Nurses’ Health Study II (NHSII). GUTS participants are the children of participants in NHSII; thus, child and maternal data are available. In addition, GUTS contains siblings, allowing for comparisons of LGB and heterosexual siblings. Of 5,647 GUTS youths (M = 20.6 years old in 2005), 1.6% were lesbian/gay (LG), 1.6% bisexual (BI), 9.9% mostly heterosexual (MH), and 86.9% completely heterosexual (CH). After adjusting for sibling clustering in GUTS and covariates, significantly more sexual minorities (LGs, BIs, and MHs) than CHs reported lifetime and past-year smoking, nonmarijuana illicit drug use, and prescription drug misuse. More sexual minorities also reported marijuana use in the past year. The relations between sexual orientation and substance use were moderated by the stress markers: As mother’s discomfort with homosexuality increased, more BIs and MHs than CHs used substances. As childhood gender nonconforming behaviors increased, more LGs than CHs used substances. The relations between sexual orientation and substance use were mediated by attachment and maternal affection (percent of effect mediated ranged from 5.6% to 16.8%% for lifetime substance use and 4.9% to 24.5% for past-year use). In addition, sibling comparisons found that sexual minorities reported more substance use, more childhood gender nonconforming behaviors, and less secure attachment than CH siblings; mothers reported less affection for their sexual minority than CH offspring. The findings indicate the importance of stress and attachment paradigms for understanding sexual-orientation disparities in substance use.
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Gender Identity Rather Than Sexual Orientation Impacts on Facial Preferences
Giacomo Ciocca et al.
Journal of Sexual Medicine, forthcoming
Aim: This study aims to investigate the facial preferences of male-to-female (MtF) individuals with gender dysphoria (GD) and the influence of short-term/long-term relationships on facial preference, in comparison with healthy subjects.
Methods: Eighteen untreated MtF subjects, 30 heterosexual males, 64 heterosexual females, and 42 homosexual males from university students/staff, at gay events, and in Gender Clinics were shown a composite male or female face. The sexual dimorphism of these pictures was stressed or reduced in a continuous fashion through an open-source morphing program with a sequence of 21 pictures of the same face warped from a feminized to a masculinized shape.
Results: MtF GD subjects and heterosexual females showed the same pattern of preferences: a clear preference for less dimorphic (more feminized) faces for both short- and long-term relationships. Conversely, both heterosexual and homosexual men selected significantly much more dimorphic faces, showing a preference for hyperfeminized and hypermasculinized faces, respectively.
Conclusions: These data show that the facial preferences of MtF GD individuals mirror those of the sex congruent with their gender identity. Conversely, heterosexual males trace the facial preferences of homosexual men, indicating that changes in sexual orientation do not substantially affect preference for the most attractive faces.
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The changing face of cognitive gender differences in Europe
Daniela Weber et al.
Proceedings of the National Academy of Sciences, 12 August 2014, Pages 11673–11678
Abstract:
Cognitive gender differences and the reasons for their origins have fascinated researchers for decades. Using nationally representative data to investigate gender differences in cognitive performance in middle-aged and older populations across Europe, we show that the magnitude of these differences varies systematically across cognitive tasks, birth cohorts, and regions, but also that the living conditions and educational opportunities individuals are exposed to during their formative years are related to their later cognitive performance. Specifically, we demonstrate that improved living conditions and less gender-restricted educational opportunities are associated with increased gender differences favoring women in some cognitive functions (i.e., episodic memory) and decreases (i.e., numeracy) or elimination of differences in other cognitive abilities (i.e., category fluency). Our results suggest that these changes take place due to a general increase in women’s cognitive performance over time, associated with societal improvements in living conditions and educational opportunities.
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Excusing Murder? Conservative Jurors’ Acceptance of the Gay-Panic Defense
Jessica Salerno et al.
Psychology, Public Policy, and Law, forthcoming
Abstract:
We conducted a simulated trial study to investigate the effectiveness of a “gay-panic” provocation defense as a function of jurors’ political orientation. Mock jurors read about a murder case in which a male defendant claimed a victim provoked the killing by starting a fight, which either included or did not include the male victim making an unwanted sexual advance that triggered a state of panic in the defendant. Conservative jurors were significantly less punitive when the defendant claimed to have acted out of gay panic as compared to when this element was not part of the defense. In contrast, liberal jurors were unaffected by the gay-panic manipulation. The effect of the gay-panic defense on punitiveness was mediated by conservatives’ decreased moral outrage toward the defendant. Implications for psychological theory and the legal system are discussed.
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Elevated rates of atypical handedness in paedophilia: Theory and implications
Rachel Fazio, Amy Lykins & James Cantor
Laterality, November/December 2014, Pages 690-704
Abstract:
Multiple factors determine handedness including genetics, prenatal stress and post-natal environmental conditions. Atypical handedness, whether manifest as increased sinistrality or decreased strength of lateral preference, has been noted in a wide variety of populations with neuropathology. Those with atypical sexual preferences, specifically paedophilia, also manifest reduced rates of right-handedness. This paper uses the largest sample of phallometrically assessed men to date to establish the pattern of atypical handedness in paedophilia. Specifically, whereas prior research has largely characterized participants dichotomously as right-handed or non-right-handed and/or used self-report of writing hand, this paper expands upon such reports by using the Edinburgh Handedness Inventory's laterality quotient. Participants' handedness and phallometrically assessed sexual preference were analyzed both as continuous and categorical variables, and the responses of those scoring in the range of ambiguous-handedness were evaluated to ascertain whether they were ambiguously handed or more accurately described as mixed-handed. Results indicated those producing scores in the range of ambiguous-handedness demonstrated response patterns consistent with ambiguous-handedness, rather than mixed-handedness. Paedophiles demonstrated high rates of non-right-handedness primarily manifested as sinistrality, whereas those who had a sexual preference for pubescent children evidenced increased ambiguous-handedness. Results support a view of ambiguous-handedness as less pathological than previously hypothesized, and of a neurodevelopmental origin of paraphilic sexual preferences.
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Variation in Orgasm Occurrence by Sexual Orientation in a Sample of U.S. Singles
Justin Garcia et al.
Journal of Sexual Medicine, forthcoming
Aim: To assess orgasm occurrence during sexual activity across sexual orientation categories.
Methods: Data were collected by Internet questionnaire from 6,151 men and women (ages 21–65+ years) as part of a nationally representative sample of single individuals in the United States. Analyses were restricted to a subsample of 2,850 singles (1,497 men, 1,353 women) who had experienced sexual activity in the past 12 months.
Results: Mean occurrence rate for experiencing orgasm during sexual activity with a familiar partner was 62.9% among single women and 85.1% among single men, which was significantly different (F1,2848 = 370.6, P < 0.001, η2 = 0.12). For men, mean occurrence rate of orgasm did not vary by sexual orientation: heterosexual men 85.5%, gay men 84.7%, bisexual men 77.6% (F2,1494 = 2.67, P = 0.07, η2 = 0.004). For women, however, mean occurrence rate of orgasm varied significantly by sexual orientation: heterosexual women 61.6%, lesbian women 74.7%, bisexual women 58.0% (F2,1350 = 10.95, P < 0.001, η2 = 0.02). Lesbian women had a significantly higher probability of orgasm than did either heterosexual or bisexual women (P < 0.05).
Conclusions: Findings from this large dataset of U.S. singles suggest that women, regardless of sexual orientation, have less predictable, more varied orgasm experiences than do men and that for women, but not men, the likelihood of orgasm varies with sexual orientation. These findings demonstrate the need for further investigations into the comparative sexual experiences and sexual health outcomes of sexual minorities.
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Heidemarie Blumenthal et al.
Journal of Adolescence, August 2014, Pages 893–900
Abstract:
Research indicates changes in HPA-axis activity across puberty. The current study extends existing work by evaluating pubertal status and cortisol level in a novel social environment (research laboratory) while controlling for several important biological, behavioral, and psychological variables. Participants were 30 girls (ages 9–16 years) from the United States. Pubertal status was assessed via the Pubertal Development Scale. Salivary samples were collected at laboratory-introduction and a matched at-home period; laboratory-introduction levels were regressed on basal cortisol levels to create standardized residual scores. After controlling for covariates, pubertal status was positively associated with residualized cortisol values. Findings indicate more advanced puberty related to greater cortisol response to the laboratory; data are discussed in terms of future research and building biopsychosocial models of the puberty-psychopathology linkage.
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Sex difference in leukocyte telomere length is ablated in opposite-sex co-twins
Athanase Benetos et al.
International Journal of Epidemiology, forthcoming
Background: In eutherian mammals and in humans, the female fetus may be masculinized while sharing the intra-uterine environment with a male fetus. Telomere length (TL), as expressed in leukocytes, is heritable and is longer in women than in men. The main determinant of leukocyte TL (LTL) is LTL at birth. However, LTL is modified by age-dependent attrition.
Methods: We studied LTL dynamics (LTL and its attrition) in adult same-sex(monozygotic, n = 268; dizygotic, n = 308) twins and opposite-sex (n = 144) twins. LTL was measured by Southern blots of the terminal restriction fragments.
Results: We observed that in same-sex (both monozygotic and dizygotic) twins, as reported in singletons, LTL was longer in females than in males [estimate ± standard error (SE):163 ± 63 bp, P < 0.01]. However, in opposite-sex twins, female LTL was indistinguishable from that of males (−31 ± 52 bp, P = 0.6), whereas male LTL was not affected. Findings were similar when the comparison was restricted to opposite-sex and same-sex dizygotic twins (females relative to males: same-sex: 188 ± 90 bp, P < 0.05; other-sex: −32 ± 64 bp, P = 0.6).
Conclusions: These findings are compatible with masculinization of the female fetus in opposite-sex twins. They suggest that the sex difference in LTL, seen in the general population, is largely determined in utero, perhaps by the intrauterine hormonal environment. Further studies in newborn twins are warranted to test this thesis.