One psychiatrist introduced an idea that birth order could impact development and personality. Alfred Adler of Austria ... in them at an early age. Adler’s theory included that middle-born ...

Annie Wright, a licensed marriage and family therapist, told Business Insider that "birth order can influence personality ...

Where you land in your sibling line-up has long been thought to influence your personality ... significance of birth order was first championed by Austrian physician Alfred Adler in the 1920s ...