Factors associated with jealousy over real and imagined infidelity: An examination of the social-cognitive and evolutionary psychology perspectives

Three hundred fifty-eight undergraduates completed anonymous questionnaires regarding jealousy over a mate s infidelity. More men than women predicted that sexual infidelity would be worse than emotional infidelity when given the forcedchoice hypothetical measures used in previous work. When some of the implications of hypothetical infidelity were controlled, the gender difference disappeared. One hundred twenty-seven participants reported having actual experience with a mate's infidelity. The two genders did not differ in degree of focus on the sexual versus emotional aspects of a mate's real betrayal. Sexual jealousy was correlated with having a greater number of sexual relationships and, for men but not women, with placing higher importance on sex in dating relationships. The results are discussed from a socialcognitive perspective. Although jealousy is mentioned in literature as old as the Bible, empirical research on the topic has been relatively scarce over the past two millennia. This, however, has begun to change in the last two decades. One particular topic has been the focus of considerable debate: To what degree do men and women differ in how much they are bothered by a mate's sexual or emotional infidelity? Does the existing empirical evidence support claims that men and women have different innate specific adaptations that trigger jealousy? This paper examines this issue using a sample of heterosexual college students who were asked to answer a variety of questions about their experiences with actual infidelity as well as their reactions to hypothetical infidelity. The Specific Innate Modular View of Gender Differences in Jealousy Several evolutionary psychologists have argued that there are strong gender differences in how men and women fee

The evolution of jealousy: Did men and women, facing different selective pressures, evolve different “brands” of jealousy? Recent evidence suggests not

L ove wasn't the only thing in the air on Valentine's Day 2003. A Texas jury had just found C. Harris guilty of killing her husband in a "sudden passion." After encountering him at a hotel with a mistress, she had driven the car over his body again and again. As others were exchanging tokens of love, the "Mercedes murderer" was sentenced to spend 20 years in jail. Clara Harris was hardly the first woman to stand accused of murdering in a jealous rage. In various studies, jealousy is often ranked among the top three motives for nonaccidental homicides where motive is known-along with rage arising from a quarrel and murder during the commission of a crime. Across the ages the confounding power of sexual jealousy has inspired poetry, novels, drama, art and opera. It has also captured the attention of psychologists, who have used a variety of theoretical approaches in their pursuit of scientific understanding. Early work focused on Freudian interpretations, the influence of which can still be seen in the psychiatric literature. As in other domains of psychology, however, recent research has followed a rather different direction. For some years now, a small but persistent group of investigators has attempted to uncover the nature and origin of this painful and dangerous counterpart of romantic love. Most of us know jealousy from experience as a deeply negative emotion that arises when an important relationship is threatened by a rival. Given the inherent intricacies of social relationships, a simple theory that adequately captures the complexity of jealousy is unlikely. Hence research has focused on the interplay between social and cognitive factors in the incidence and expression of this emotion. Some psychologists have explored cultural differences and have found that jealousy is more pronounced in cultures that attach social importance to marriage and sanction sexual gratification only in the marriage bed and in cultures that place a premium on personal property. Others have tried to account for why some individuals show strong jealousy at the slightest provocation and others seem less susceptible. (Factors examined in these studies range from personality and parental-attachment styles to who has the better "deal" in a relationship.) One relatively straightforward idea about jealousy in romantic relationships is at the center of a hot debate among psychologists. During the 1990s, as evolutionary psychologists began applying Darwin's theories to human behavior in novel ways, a new theory of the origins of jealousy developed. Jealousy, it was suggested, might have given a fitness advantage to men and women in our ancestral environment. But the selective pressures on males and females struggling to survive and reproduce in this environment were asymmetrical. Thus jealousy, like many of the emotions associated with mating, came to have a different character in men and women. The notion that jealousy evolved into an "innate module"-a wired-in brain circuit that has different primary triggers in men and women-is one of the most celebrated applications of an evolutionary approach to psychology. Debate over this hypothesis continues. In fact, newer evidence raises questions about whether there is a fundamental difference between the male and the female experience of jealousy in romantic relationships. After reviewing the evidence in light of other theories, I believe an evolutionary explanation for this emotion may turn out to be more subtle and complex than the recent view suggests. Jealousy could certainly be an innate and adaptive emotion, but its form may be better explained by social-cognitive approaches, as well as developmental theory, than by theories based on proposed sex differences in our ancestors' mating strategies. 62 American Scientist, Volume 9

Globular Clusters and X-ray Point Sources in Centaurus A (NGC 5128)

We detect 353 X-ray point sources, mostly low-mass X-ray binaries (LMXBs), in four Chandra observations of Centaurus A (NGC 5128), the nearest giant early-type galaxy, and correlate this point source population with the largest available ensemble of confirmed and likely globular clusters associated with this galaxy. Of the X-ray sources, 31 are coincident with 30 globular clusters that are confirmed members of the galaxy by radial velocity measurement (2 X-ray sources match one globular cluster within our search radius), while 1 X-ray source coincides with a globular cluster resolved by HST images. Another 36 X-ray point sources match probable, but spectroscopically unconfirmed, globular cluster candidates. The color distribution of globular clusters and cluster candidates in Cen A is bimodal, and the probability that a red, metal rich GC candidate contains an LMXB is at least 1.7 times that of a blue, metal poor one. If we consider only spectroscopically confirmed GCs, this ratio increases to ~3. We find that LMXBs appear preferentially in more luminous (massive) GCs. These two effects are independent, and the latter is likely a consequence of enhanced dynamical encounter rates in more massive clusters which have on average denser cores. The X-ray luminosity functions of the LMXBs found in GCs and of those that are unmatched with GCs reveal similar underlying populations, though there is some indication that fewer X-ray faint LMXBs are found in globular clusters than X-ray bright ones. Our results agree with previous observations of the connection of GCs and LMXBs in early-type galaxies and extend previous work on Centaurus A.Comment: 34 pages, 10 figures, 2 tables, Accepted for Publication in The Astrophysical Journa

Prevalence of iron deficiency in 62,685 women of seven race/ethnicity groups: The HEIRS Study.

BackgroundFew cross-sectional studies report iron deficiency (ID) prevalence in women of different race/ethnicity and ages in US or Canada.Materials and methodsWe evaluated screening observations on women who participated between 2001-2003 in a cross-sectional, primary care-based sample of adults ages ≥25 y whose observations were complete: race/ethnicity; age; transferrin saturation; serum ferritin; and HFE p.C282Y and p.H63D alleles. We defined ID using a stringent criterion: combined transferrin saturation <10% and serum ferritin <33.7 pmol/L (<15 μg/L). We compared ID prevalence in women of different race/ethnicity subgrouped by age and determined associations of p.C282Y and p.H63D to ID overall, and to ID in women ages 25-44 y with or without self-reported pregnancy.ResultsThese 62,685 women included 27,079 whites, 17,272 blacks, 8,566 Hispanics, 7,615 Asians, 449 Pacific Islanders, 441 Native Americans, and 1,263 participants of other race/ethnicity. Proportions of women with ID were higher in Hispanics and blacks than whites and Asians. Prevalence of ID was significantly greater in women ages 25-54 y of all race/ethnicity groups than women ages ≥55 y of corresponding race/ethnicity. In women ages ≥55 y, ID prevalence did not differ significantly across race/ethnicity. p.C282Y and p.H63D prevalence did not differ significantly in women with or without ID, regardless of race/ethnicity, age subgroup, or pregnancy.ConclusionsID prevalence was greater in Hispanic and black than white and Asian women ages 25-54 y. p.C282Y and p.H63D prevalence did not differ significantly in women with or without ID, regardless of race/ethnicity, age subgroup, or pregnancy

Complete genome sequence of the first KPC-type carbapenemase-positive Proteus mirabilis strain from a bloodstream infection

Sequencing of the blaKPC-positive strain Proteus mirabilis AOUC-001 was performed using both the MiSeq and PacBio RS II platforms and yielded a single molecule of 4,272,433 bp, representing the complete chromosome. Genome analysis showed the presence of several acquired resistance determinants, including two copies of blaKPC-2 carried on a fragment of a KPC-producing plasmid previously described in Klebsiella pneumoniae

Meningococcal Disease in Patients With Human Immunodeficiency Virus Infection: A Review of Cases Reported Through Active Surveillance in the United States, 2000-2008.

BackgroundAlthough human immunodeficiency virus (HIV) infection is an established risk factor for several bacterial infections, the association between HIV infection and meningococcal disease remains unclear.MethodsExpanded chart reviews were completed on persons with meningococcal disease and HIV infection reported from 2000 through 2008 from 9 US sites participating in an active population-based surveillance system for meningococcal disease. The incidence of meningococcal disease among patients meeting Centers for Disease Control and Prevention acquired immune deficiency syndrome (AIDS) surveillance criteria was estimated using data from the National HIV Surveillance System for the participating sites.ResultsThirty-three cases of meningococcal disease in individuals with HIV infection were reported from participating sites, representing 2.0% of all reported meningococcal disease cases. Most (75.8%) persons with HIV infection were adult males aged 25 to 64 years old. Among all meningococcal disease cases aged 25 to 64 years old, case fatality ratios were similar among HIV-infected and HIV-uninfected persons (13.3% vs 10.6%; P = .6). The cumulative, mean incidence of meningococcal disease among patients aged 25 to 64 years old with HIV infection ever classified as AIDS was 3.5 cases per 100000 person years (95% confidence interval [CI], 2.1-5.6), compared with 0.3 cases per 100000 person years (95% CI, 0.3-0.3) for persons of the same age group not reported to have AIDS (relative risk = 12.9; 95% CI, 7.9-20.9).ConclusionsIndividuals with HIV infection meeting the AIDS surveillance case definition have a higher incidence of meningococcal disease compared with the general adult population

Insulin-stimulated phosphorylation of endothelial nitric oxide synthase at serine-615 contributes to nitric oxide synthesis

Insulin stimulates endothelial NO (nitric oxide) synthesis via PKB (protein kinase B)/Akt-mediated phosphorylation and activation of eNOS (endothelial NO synthase) at Ser-1177. In previous studies, we have demonstrated that stimulation of eNOS phosphorylation at Ser-1177 may be required, yet is not sufficient for insulin-stimulated NO synthesis. We therefore investigated the role of phosphorylation of eNOS at alternative sites to Ser-1177 as candidate parallel mechanisms contributing to insulin-stimulated NO synthesis. Stimulation of human aortic endothelial cells with insulin rapidly stimulated phosphorylation of both Ser-615 and Ser-1177 on eNOS, whereas phosphorylation of Ser-114, Thr-495 and Ser-633 was unaffected. Insulin-stimulated Ser-615 phosphorylation was abrogated by incubation with the PI3K (phosphoinositide 3-kinase) inhibitor wortmannin, infection with adenoviruses expressing a dominant-negative mutant PKB/Akt or pre-incubation with TNFα (tumour necrosis factor α), but was unaffected by high culture glucose concentrations. Mutation of Ser-615 to alanine reduced insulin-stimulated NO synthesis, whereas mutation of Ser-615 to aspartic acid increased NO production by NOS in which Ser-1177 had been mutated to an aspartic acid residue. We propose that the rapid PKB-mediated stimulation of phosphorylation of Ser-615 contributes to insulin-stimulated NO synthesis

Costs of reproduction and carry-over effects in breeding albatrosses

We investigated the physiology of two closely related albatross species relative to their breeding strategy: black-browed albatrosses (Thalassarche melanophris) breed annually, while grey-headed albatrosses (T. chrysostoma) breed biennially. From observations of breeding fate and blood samples collected at the end of breeding in one season and feather corticosterone levels (fCort) sampled at the beginning of the next breeding season, we found that in both species some post-breeding physiological parameters differed according to breeding outcome (successful, failed, deferred). Correlations between post-breeding physiology and fCort, and links to future breeding decisions, were examined. In black-browed albatrosses, post-breeding physiology and fCort were not significantly correlated, but fCort independently predicted breeding decision the next year, which we interpret as a possible migratory carry-over effect. In grey-headed albatrosses, post-breeding triglyceride levels were negatively correlated with fCort, but only in females, which we interpret as a potential cost of reproduction. However, this potential cost did not carry-over to future breeding in the grey-headed albatrosses. None of the variables predicted future breeding decisions. We suggest that biennial breeding in the grey-headed albatrosses may have evolved as a strategy to buffer against the apparent susceptibility of females to negative physiological costs of reproduction. Future studies are needed to confirm this

Homemade Nucleic Acid Preservation Buffer Proves Effective in Preserving the Equine Faecal Microbiota over Time at Ambient Temperatures

Funding This research was funded by Mars Petcare UK and the Scottish Funding Council Research Excellence Grant (REG). Authors WR and MN receive salary support from the Rural and Environmental Sciences and Analytical Services Division (RESAS).Peer reviewedPublisher PD