Estimating the Associations between Big Five Personality Traits, Testosterone, and Cortisol

OBJECTIVE: Hormones are often conceptualized as biological markers of individual differences and have been associated with a variety of behavioral indicators and characteristics, such as mating behavior or acquiring and maintaining dominance. However, before researchers create strong theoretical models for how hormones modulate individual and social behavior, information on how hormones are associated with dominant models of personality is needed. Although there have been some studies attempting to quantify the associations between personality traits, testosterone, and cortisol, there are many inconsistencies across these studies. METHODS: In this registered report, we examined associations between testosterone, cortisol, and Big Five personality traits. We aggregated 25 separate samples to yield a single sample of 3964 (50.3% women; 27.7% of women were on hormonal contraceptives). Participants completed measures of personality and provided saliva samples for testosterone and cortisol assays. RESULTS: The results from multi-level models and meta-analyses revealed mostly weak, non-significant associations between testosterone or cortisol and personality traits. The few significant effects were still very small in magnitude (e.g., testosterone and conscientiousness: r = −0.05). A series of moderation tests revealed that hormone-personality associations were mostly similar in men and women, those using hormonal contraceptives or not, and regardless of the interaction between testosterone and cortisol (i.e., a variant of the dual-hormone hypothesis). CONCLUSIONS: Altogether, we did not detect many robust associations between Big Five personality traits and testosterone or cortisol. The findings are discussed in the context of biological models of personality and the utility of examining heterogeneity in hormone-personality associations

The islamic public sphere and the discipline of adab

Recently, there have been many compelling new theories of the emergence of an “Islamic public sphere.” Few studies, however, have examined the role of literary writing in contributing to its emergence, even though such writing was critical to the intellectual elite's shift toward Islamic subjects in mid-20th century Egypt. In addition, little of this scholarship has examined the gendered nature of this public sphere in any depth, though gendered rights, roles, and responsibilities were among the most hotly contested debates in public discourses on religion. This article looks at how literary writing not only shaped particular interpretations of gendered relationships in Islam but also developed hermeneutical techniques for reinterpreting religious sources. It specifically examines the work of Egyptian literary scholar and Islamic thinker Bint al-Shatiʾ and how her writings helped define the nature of the family, gender relations, and the private sphere in Islamic public discourse. © 2011, Cambridge University Press. All rights reserved

The private is political: Women and family in intellectual Islam

In Hiba Ra'uf's Woman and Political Work, she argues that the family is the basic political unit of the Islamic community or nation (the umma). Her thesis is both feminist and Islamist, as she argues that the 'private is political'. By drawing analogies between family and umma, family and caliphate, the personal and the political, the private and public, Ra'uf seeks to dismantle the oppositions of secular society, to challenge the division of society into discrete spheres. This entails an implicit challenge to the secular state, but effected through the politics of the family. An Islamic family, she argues, is a powerful site for the transformation of socio-political institutions; a politics of the microcosmic with macrocosmic ramifications, effected through the very embodiment and practice of an Islamic ethos at a grassroots, capillary level. However, though Ra'uf contests liberal secularism's division of spheres with feminist and Islamist critical methods, she reproduces some of its fundamental assumptions about the nature of the family: as the domain of religion, in opposition to the secular state; as rooting community, in opposition to the individualism of the citizen; as an ethics grounded in affect; and as an essentially feminine world. In making the family the sphere of Islamic politics, Ra'uf re-enacts secularism's division of spheres, sacralizing the affective bonds of intimate relations and making the family the domain of religion. Furthermore, by emphasizing the family as the domain of women's political work, she reinscribes the family as a feminine sphere, so that woman's vocation is familial, as is her ethical disposition. © The Author(s) 2010

How Alkyl Halide Structure Affects E2 And S(N)2 Reaction Barriers: E2 Reactions Are As Sensitive As S(N)2 Reactions

High-level electronic structure calculations, including a continuum treatment of solvent, are employed to elucidate and quantify the effects of alkyl halide structure on the barriers of S(N)2 and E2 reactions. In cases where such comparisons are available, the results of these calculations show close agreement with solution experimental data. Structural factors investigated include alpha- and beta-methylation, adjacency to unsaturated functionality (allyl, benzyl, propargyl, alpha to carbonyl), ring size, and alpha-halogenation and cyanation. While the influence of these factors on S(N)2 reactivity is mostly well-known, the present study attempts to provide a broad comparison of both S(N)2 and E2 reactivity across many cases using a single methodology, so as to quantify relative reactivity trends. Despite the fact that most organic chemistry textbooks say far more about how structure affects S(N)2 reactions than about how it affects E2 reactions, the latter are just as sensitive to structural variation as are the former. This sensitivity of E2 reactions to structure is often underappreciated

How Alkyl Halide Structure Affects E2 and S_N2 Reaction Barriers: E2 Reactions Are as Sensitive as S_N2 Reactions

High-level electronic structure calculations, including a continuum treatment of solvent, are employed to elucidate and quantify the effects of alkyl halide structure on the barriers of S_N2 and E2 reactions. In cases where such comparisons are available, the results of these calculations show close agreement with solution experimental data. Structural factors investigated include α- and β-methylation, adjacency to unsaturated functionality (allyl, benzyl, propargyl, α to carbonyl), ring size, and α-halogenation and cyanation. While the influence of these factors on S_N2 reactivity is mostly well-known, the present study attempts to provide a broad comparison of both S_N2 and E2 reactivity across many cases using a single methodology, so as to quantify relative reactivity trends. Despite the fact that most organic chemistry textbooks say far more about how structure affects S_N2 reactions than about how it affects E2 reactions, the latter are just as sensitive to structural variation as are the former. This sensitivity of E2 reactions to structure is often underappreciated

Mixed Evidence for Biotic Homogenization of Southern Appalachian Fish Communities

Anthropogenic impacts on the landscape can drive biotic homogenization, whereby distinct biological communities become more similar to one another over time. Land-use change in the Southern Appalachian region is expected to result in homogenization of the highly diverse freshwater fish communities as in-stream habitat alterations favor widespread cosmopolitan species at the expense of more narrowly distributed highland endemic species. We compiled four datasets spanning 25 years to (1) evaluate the effects of environmental factors on relative abundance and richness of highland endemic vs. cosmopolitan species in this region and (2) test for taxonomic homogenization, measured as a change in beta diversity over time. We found that several environmental factors differentially affected highland endemic and cosmopolitan species, with the proportion of forested land cover in a watershed most strongly predicting higher relative abundance and richness of highland endemic species. Our analysis of beta diversity change, however, shows mixed evidence of taxonomic homogenization, depending on how common species are weighted. Shifts in community composition, with or without homogenization, may warrant attention in biodiversity conservation planning.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author