As any first-year psychology student can tell you, our personalities are determined by a complex combination of our genetics and our environment. Among the wide array of environmental influences on ...

When we think about the relationships that shape us, we often default to discussing our parents. Decades of psychological research have explored the influence of parenting styles, attachment dynamics, ...

Parents try everything to influence their children. But new research suggests brothers and sisters have their own profound impact. Credit...Artwork by Kensuke Koike Supported by By Susan Dominus Susan ...