Oh, how the world changed when his parents went out, leaving him in the hands of his big brother. "That was always a great opportunity for him to have fun, typically at my expense," he recalls. While he could stay up late and watch shows like Gunsmoke, those privileges came at a price. His brother spoon-fed him putrid concoctions from the fridge, once shocked him with a live wire, and another time wrapped him head to toe like a mummy, so that only his nostrils peeked out. "I didn't ever suffer permanent injury," he says, laughing. "Except maybe to my mind."
Ah, siblings: both a blessing and a curse. Approximately 80 percent of Americans have at least one brother or sister; in fact, kids today are more likely to grow up with a sibling than a father, experts say. What's more, the sibling relationship is the longest relationship that most people will have in their lives. Yet brothers and sisters have gotten short shrift in the research about what affects who we are and how we behave, experts say. They've been "amazingly neglected," says Judith Dunn, a professor of developmental psychology at King's College London.
Not least among those now paying attention are psychoanalysts, whose principal preoccupation has traditionally—and with good reason—been the powerful influence of parents. Many psychoanalysts now concede that people can be shaped as much or more by their siblings, says Jonah Schein, an associate clinical professor of psychiatry at the Weill Cornell Medical College who held a conference called "Missing: Siblings in Psychoanalysis" last fall.
"My brother certainly did have a big impact on my life," says Lew Bank, 61. Some 50 years after being mummy-wrapped in his parent's basement, Bank is a psychologist and a senior scientist at the Oregon Social Learning Center who studies siblings—an interest that was piqued in part by his strong relationship with his brother. Though the extent of the sibling influence varies greatly from family to family and person to person, "there's growing evidence to suggest that siblings shape each other in important ways," says Laurie Kramer, a professor of applied family studies at the University of Illinois at Urbana, Champaign. Here are a few:
She adds, "Some evidence suggests that when kids have good relationships with siblings, they're more likely to develop good relationships with their peers." But we're still learning about that, she says.