Researchers have found that adolescents focus more on their own interests compared to adults when navigating social dilemmas, even when their interaction partners show greater willingness to cooperate.

Over time, expectations can shift, especially when something remains out of reach. Researchers from Rutgers University-New Brunswick suggest this also may be true for orgasms.

When an orgasm is repeatedly absent, women may begin to see it as less important, according to the researchers, whose study published in Personality and Social Psychology Bulletin.

“Women don’t necessarily care less about orgasm compared to men, but when it doesn’t happen regularly, they may start to see it as less important,” said Grace Wetzel, the lead author of the study who conducted the research as a former Rutgers doctoral student and is now at Indiana University. “That shift in expectations may be one way people adapt to the ‘orgasm gap,’ the well-documented pattern in which heterosexual women experience orgasm less often than men during partnered sex.”

Established in 1868 with the ratification of the 14th Amendment to the U.S. Constitution, birthright citizenship grants citizenship to all persons born on U.S. soil regardless of the parents’ citizenship status. If birthright citizenship is ended, the number of children born without a defined legal status in the United States may reach up to 6.4 million by 2050, according to a new study by Penn State researchers published today (March 31) in the journal Demography.

New twin research shows that innate IQ plays a major role in predicting your future socio-economic status. The study, which follows twins during the crucial early adult years, reinforces the view that heredity and genes shape our life opportunities – and the people we become.

Is wittiness a kind of fitness? Ljiljana Progovac explores the idea that quick-wittedness—using and combining words in a clever and funny way—has been actively selected for in humans from the dawn of language.