The evolution and maintenance of secondary sexual characteristics and behavior are heavily influenced by the variance in mating success among individuals in a population. The operational sex ratio (OSR) is often used as a predictor of the intensity of competition for mates, as it describes the relative number of males and females who are ready to mate. We investigate changes in aggression, cour...

There is interest in understanding the influence of biological factors, like sex, on the organization of brain function. We investigated the influence of biological sex on the behavioral and neural basis of face recognition in healthy, young adults. In behavior, there were no sex differences on the male Cambridge Face Memory Test (CFMT)+ or the female CFMT+ (that we created) and no own-gender b...

Attempted Sodomy on a Child (3 to Life) The following is an analysis of the charging patterns of mandatory prison sex offenses established under Senate Bill 26 (Crime Penalty Adjustments) passed by the Utah Legislature in 1996. Adjacent is a listing of these mandatory prison sex offenses. Senate Bill 26 eliminated mandatory minimum sentencing for sex offenses against children. This legislation ...

The study aimed at testing chronotype and gender differences in the time of day when humans feel the greatest need for sex and the time of day they actually undertake sexual activity. A Polish sample of 565 participants aged between 18 and 57 was tested. In females, regardless of chronotype, the greatest need for sex occurred between 18:00 and 24:00, but a secondary peak appeared in morning typ...

The area of female criminality has historically attracted little attention from criminologists,! and remains one in which few systematic empirical studies have been conducted. One point that has been firmly established, however, is that male arrest rates surpass female arrest rates in all societies and in all historical periods for which reliable data are available. Nonetheless, explanations fo...

This question could be asked about sex: the verb or sex: the noun. In noun form, sex (or sex assigned at birth) is a term used to describe physical or genetic markers ? more specifically, hormones, genes, and reproductive organs. Biologically speaking, it's a myth that there are only two sexes, male and female. All physical sex characteristics ? from genitals, to hormones, to chromosomes ? fall...

Lack of confidence in one's own ability can increase the likelihood of relying on social information. Sex differences in confidence have been extensively investigated in cognitive tasks, but implications for conformity have not been directly tested. Here, we tested the hypothesis that, in a task that shows sex differences in confidence, an indirect effect of sex on social information use will a...

The objective of this study was to analyze the gonadossomatic relation of males and females of Brycon opalinus (the Pirapitinga do Sul) in the Serra do Mar State Park--Núcleo Santa Virgínia. The study area included three rivers: Paraibuna, Ipiranga, and Grande. From the gonadossomatic relation, it was possible to determine the reproductive season and strategy of this species. The gonadossomatic...

This question could be asked about sex: the verb or sex: the noun. In noun form, sex (or sex assigned at birth) is a term used to describe physical or genetic markers ? more specifically, hormones, genes, and reproductive organs. Biologically speaking, it's a myth that there are only two sexes, male and female. All physical sex characteristics ? from genitals, to hormones, to chromosomes ? fall...

OBJECTIVE The primary aim of this study was to assess sex differences in depression in later life. METHOD In a random, age and sex-stratified community sample of 3056 older Dutch people (55 85 years) the prevalence, symptom-reporting and risk factors associated with depression in later life were studied. Depression was measured with the Center for Epidemiologic Studies Depression scale (CES-D...