Siblings bear responsibility for the spread of problem behaviors. Adolescents with a delinquent brother or sister are more likely to misuse alcohol and other substances than those without a delinquent sibling. Identifying the exact nature of that influence has proven difficult, because behavior problems in siblings can also be traced to friends, shared genetics and shared experiences with parents. Evidence describing how problem behaviors spread between siblings and across domains has been scarce – until now.

Finally, psychologists have discovered a type of face that men are better at identifying than women: the faces on Transformer toys.

Columbus: The violent and sexual media you consume during the day may infiltrate your dreams at night, new research suggests.

What's in a tweet? From gender to education, the words used on social media carry impressions to others. Using publicly available tweets, social psychologists and computer scientists from the University of Pennsylvania Positive Psychology Center, Germany, and Australia are helping us to parse out the stereotypes formed by word choices on the social media channel Twitter. Utilizing natural language processing (NLP), a form of artificial intelligence, the researchers show where stereotyping goes from "plausible" to wrong.

Iowa: The nomination of the first woman presidential candidate by a major party has shattered some gender barriers, while at the same time reinforced certain stereotypes and double standards that still exist for women.

Ithaca: Researchers in the social sciences have been searching for a holy grail: an accurate way to predict who is likely to engage in problematic behavior, like using drugs.