What's wrong with the teenage mind?

Alison Gopnik's catchy title for a Wall Street Journal article about the balance/imbalance between the motivation system in the brain and the control system -- before, during and after puberty.

Here's a sample:
At the same time, contemporary children have very little experience with the kinds of tasks that they'll have to perform as grown-ups. Children have increasingly little chance to practice even basic skills like cooking and caregiving. Contemporary adolescents and pre-adolescents often don't do much of anything except go to school. Even the paper route and the baby-sitting job have largely disappeared.

The experience of trying to achieve a real goal in real time in the real world is increasingly delayed, and the growth of the control system depends on just those experiences. The pediatrician and developmental psychologist Ronald Dahl at the University of California, Berkeley, has a good metaphor for the result: Today's adolescents develop an accelerator a long time before they can steer and brake.

This doesn't mean that adolescents are stupider than they used to be. In many ways, they are much smarter. An ever longer protected period of immaturity and dependence—a childhood that extends through college—means that young humans can learn more than ever before. There is strong evidence that IQ has increased dramatically as more children spend more time in school, and there is even some evidence that higher IQ is correlated with delayed frontal lobe development.

All that school means that children know more about more different subjects than they ever did in the days of apprenticeships. Becoming a really expert cook doesn't tell you about the nature of heat or the chemical composition of salt—the sorts of things you learn in school.

But there are different ways of being smart. Knowing physics and chemistry is no help with a soufflé. Wide-ranging, flexible and broad learning, the kind we encourage in high-school and college, may actually be in tension with the ability to develop finely-honed, controlled, focused expertise in a particular skill, the kind of learning that once routinely took place in human societies. For most of our history, children have started their internships when they were seven, not 27.