Prepulse inhibition (PPI) refers to a reduction in the startle response to a strong sensory stimulus when this stimulus is preceded by a weaker stimulus--the prepulse. PPI reflects a nonlearned sensorimotor gating mechanism and also shows a robust gender difference, with women exhibiting lower PPI than men. The present study examined the eyeblink startle responses to acoustic stimuli of 59 heal...

One hundred planned lesbian-parent families (i.e., two-mother families in which the child was born to the lesbian relationship) were compared with 100 heterosexual-parent families on child adjustment, parental characteristics, and child rearing. Questionnaires, observations, and a diary of activities were used to collect the data. The results show that especially lesbian social mothers (i.e., n...

Empathizing and systemizing have recently been put forward as two important individual-difference dimensions, whose different mean levels in men and women are argued to account for many psychological sex differences. This paper presents a series of studies designed to investigate the reliability and validity of the empathizing and systemizing quotients (EQ & SQ), to relate them to existing pers...

The auditory system exhibits differences by sex and by sexual orientation, and the implication is that relevant auditory structures are altered during prenatal development, possibly by exposure to androgens. The otoacoustic emissions (OAEs) of newborn male infants are weaker than those of newborn females, and these sex differences persist through the lifespan. The OAEs of nonheterosexual female...

According to social identity theory, group members sometimes react to threats to their group's distinctiveness by asserting the distinctiveness of their group. In four studies (n = 261) we tested the hypothesis that heterosexual men with a greater propensity to be threatened by homosexuality would react to egalitarian norms by endorsing biological theories of sexuality. Heterosexual men, but no...

This study examined children’s gender development and its associations with parents’ gender ideology and behavior among 172 parents (44 lesbian, 52 gay, 76 heterosexual) and their adopted children (Mage 8). Results revealed that parents’ sexual orientation was associated with children’s gender attitudes, but not with their sex-typing of self. Daughters of same-sex couples reported more flexible...

In a study comparing lesbian and heterosexual women's response to newly diagnosed breast cancer, we compared data from 29 lesbians with 246 heterosexual women with breast cancer. Our hypotheses were that lesbian breast cancer patients would report higher scores of mood disturbance; suffer fewer problems with body image and sexual activity; show more expressiveness and cohesiveness and less conf...

This study investigated the differences in loneliness, sexual satisfaction, and quality of life among three groups of prison inmates: inmates in a heterosexual romantic relationship with a fellow prisoner, inmates with a partner outside the prison, and inmates without a partner. In-person interviews with 70 male and 70 female inmates from the Topas Penitentiary (Spain) were conducted. These inm...

METHODOLOGY Every two years, RI high school students participate in the Youth Risk Behavior Survey (YRBS). The YRBS is a sample survey examining the major causes of disease and injury morbidity and mortality. The YRBS asks the following question: “Which of the following best describes you? 1) heterosexual; 2) lesbian or gay; 3) bisexual, or 4) not sure.” Student responses are parsed into two ca...

This study examined whether the gender-typed play of young children varies as a function of family structure. Using a sample of 126 couples (44 lesbian couples, 34 gay male couples, and 48 heterosexual couples) located throughout the United States, with an adopted child between the age of 2 and 4 years old (mean = 2.5 years), we examined parent reports of children's gender-typed play behavior u...