People have long been fascinated with birth order and how it shapes our lives; and recent research indicates that first- and secondborns do indeed see the world differently in ways that impact their motivation and likelihood of career and personal success.

If you pay someone to advise you on changing careers these days, the very first thing they'll likely do is administer a personality test to see what career paths you're suited to. So, how should we think about personality types?

A sister is someone with whom you can laugh and be silly like when you were kids; who still sees in you the child you were; who shares your past and your memories of it.

Everyone takes it personally when it comes to birth order. After all, everyone is an oldest or a middle or a youngest or an only child, and even as ad...

Are you a very neat person? Do you try to color coordinate your clothes? Love making lists? There's a good chance you're first born in your family bir...

Although you think you really know your siblings, you may be wrong.