1:00pm

Fri September 16, 2011
NPR Story

Science Looks At The Sibling Effect

Are you a first-born? A middle child? A twin? An only child? In his new book The Sibling Effect: What the Bonds Among Brothers and Sisters Reveal About Us, author Jeffrey Kluger describes current scientific research into the effects of siblings on human behavior, from birth order studies to sibling rivalries and fighting.

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