Washington: A new study of couples living together unmarried finds that the working class and the middle class have significantly different attitudes and approaches toward birth control, helping to explain why unwed births are far less common among the college-educated than their less-educated counterparts.

Columbus: When people are in a bad mood, they are more likely to actively search social networking sites like Facebook to find friends who are doing even worse than they are, a new study suggests.

Washington: Women in business negotiations face more deceit than men, according to new research.

Maywood: After his 20-year marriage ended in divorce, psychologist Michael Hakimi was able to remain good friends with his former wife following an amicable divorce.

London: Despite growing awareness of the dangers of casual sex, six in ten young people admit to having a one-night stand.

Columbus: Couples and other adult family members living without minors in the house are just as likely as adults living with young children or adolescents to eat family meals at home on most days of the week, new research suggests.

Atlanta: The human response to unfairness evolved in order to support long-term cooperation, according to a research team from Georgia State University and Emory University.

New York: Exposure to verbal and physical aggression between parents may hurt a child’s ability to identify and control emotions, according to a longitudinal study led by NYU’s Steinhardt School of Culture, Education, and Human Development.

Ann Arbor: One in five men in US reports violence towards their spouse or significant others, says a new nationally-representative study by the University of Michigan.

New York: With the longstanding debate over whether violent movies cause real world violence as a backstop, a study published today in PLOS One found that each person’s reaction to violent images depends on that individual’s brain circuitry, and on how aggressive they were to begin with.