The researchers emphasize that these differences are a result of the unique environment for twins—such as sharing parental ...

Sibling rivalry is the topic of discussion on Monday. Why do siblings fight, how do we handle it as parents and guardians, and how can we turn a perceived negative into a positive? Child Development ...

While sibling rivalry often captures more attention, it is the moments of sibling revelry that truly fortify familial bonds and contribute to psychological well-being. Sibling relationships are among ...

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, ...

Forbes contributors publish independent expert analyses and insights. I write about relationships, personality, and everyday psychology. Sibling relationships influence our development as growing ...

Twins often do not pick up new skills as fast as their single-born siblings in their early years, according to a study by the ...

Birth order has long been linked to differences in cognition, with firstborn children often outperforming their later-born siblings. Parental engagement and interaction have been suggested as ...

Marissa Nivison receives funding from the Social Sciences and Humanities Research Council of Canada. Sheri Madigan receives funding from the Social Sciences and Humanities Research Council, the ...