Personality typing can be fun and help people feel seen. If you took half an hour to fill out an Enneagram quiz and paid for the result, you know what we're talking about. Astrology is another ...

A surprising new study — or unsurprising, depending on who you are — suggests that the middle child takes the cake when it comes to certain personality traits. There's no denying that birth order ...

Siblings raised under the same roof can grow into very different people. Explore how culture, birth order, and family ...

While birth order is known to influence people’s personality traits and behavior, whether you’re the cautious firstborn or the risk-taking youngest child, that’s not the only way it affects your life.

The question of whether siblings' birth order shapes their personality has puzzled families and psychologists for years. But ...

Birth order doesn’t just determine when family photos are arranged. According to developmental psychologists, your position in the family constellation significantly influences personality development ...

Both humans and chimps grow up with siblings who differ a lot from each other. Chimpanzees are notoriously unhelpful—that is, there is very little evidence that they go out of their way to invest time ...