The Age of Opportunity REVIEW
This book would make a good user’s manual to the teenage brain. I would recommend it if you are a school teacher, a principal, a college Human Growth & Development instructor, a parent, a grandparent, a person working in juvenile justice, or, drum roll please, a teenager yourself. It seems like everyone would stand to benefit from an understanding of the neurological and hormonal causes for phenomena that human beings have observed in their young for thousands of years.
A character in one of Shakespeare’s plays puts it this way:
“I would there were no age between ten and three-and-twenty, or that youth would sleep out the rest, for there is nothing in the between but getting wenches with child, wronging the ancientry, stealing, fighting—Hark you now. Would any but these boiled brains of nineteen and two-and-twenty hunt this weather?”
One of the great benefits of reading this book is that you learn how to celebrate the adolescent brain rather than just complain about it. The adolescent brain, you come to realize, is a brain that has made logical compromises in the pursuit of legitimate ends. There are benefits to its features that make it worth the problems it causes. And if teenagers wrote books about the adult brain (maybe they should), they should write it in such a way that it was made clear that the advantages of the adult brain were “dearly bought” and maybe not worth the price.
Steinberg begins the book by making a claim central to his argument. The adolescent brain is doing what it is doing for a reason, and it should be celebrated for doing it so well. It is not simply a “crippled brain.” It is developing on a schedule. “Studies are showing that adolescence is a second period of heightened brain plasticity,” Steinberg writes,
“just like the first three years of life. This makes adolescence a really vulnerable time—because the brain can be damaged by harmful experiences—but it also makes it a time of tremendous opportunity.”
Thus, the title of the book.
What is important to note however is that different parts of the brain will be more “plastic” at different points in life and that the adolescent brain is not developing all over again. It is making its way toward a goal and developing in ways new to the organism that sustains it. The author writes:
“There is a time lag between the activation of brain systems that excite our emotions and impulses and the maturation of brain systems that allow us to check these feelings and urgings—it’s like driving a car with a sensitive gas pedal and bad brakes.”
Imagine for a moment going to buy a new car and the dealer says to you, “This car is a fantastic car. You are going to love it. But you should know that it is brand new and will need a little time to get fully synced up. Don’t be surprised if the accelerator is a little more sensitive to pressure than you are used to. And do not be surprised if the brakes are a little less responsive than you are used to. Those features will balance out in time.”
Would you buy that car? Would you let your teenager drive it?
That is essentially what Dr. Steinberg is saying is going on with your teenager (if you have one) or your students (if you have them) or yourself (if you are still a teen). The author argues that the adolescent brain is just more primed for experiences. It responds more intensely to things, to love, to rejection, to thrills, to losses, to food, to touch, to all of life’s epicurean pleasures, including drugs, alcohol, and risk-taking. Consider from your own experience if this is true:
“As a result, the adolescent brain is chemically primed to encode memories more deeply. The [emotion bump] doesn't exist because more emotional events take place in adolescence, but because ordinary events trigger stronger emotions”
The adolescent brain is going to be as aware of its environment as it is ever going to be for the rest of its life. It makes sense that this is so because it is literally preparing itself for the environment that it is soon going to have to come to terms with and live in. It is for this reason that putting adolescents in direct contact with dysfunctional environments is particularly damaging because it is literally furiously in the process of sculpting itself to adapt to that environment. Steinberg expresses this profound idea in the following paragraph:
“Plasticity opens the brain's windows to the outside world, but open windows can let in pollen, noise, and mosquitoes just as easily as ocean breezes, birdsong, and the fragrance of flowers. When these windows are open especially wide, as they are in infancy and adolescence, we must be especially attentive to what comes in through them.”
The ironic thing is that you actually have more plasticity as an infant and adolescent than you will have as an adult. This is the consequence of what maturing actual does in a human brain. It starts with almost unlimited connections and then begins to “prune.” Becoming an adult does not happen because you are gaining neural connections exponentially. It happens because you begin to remove connections that are irrelevant to the circumstances in which you live. “At one year Of age,” Steinberg informs us,
“there are about twice as many connections between neurons as there are in the adult brain. Pruning makes the brain function more effectively, the way that thinning a tree allows the remaining branches to grow stronger. It's part of a more extensive process through which the circuitry of the brain is remodeled through which connections between neurons are created, strengthened, weakened, or eliminated.”
The more that an adolescent brain can come in contact with the environment that it will be functioning in as an adult, the better chance it has of sculpting the perfect brain for that environment. [“Why then, I find myself asking, do we put teenagers in buildings hermetically sealed from the “real world”?] The science on this seems to be clear:
“The developing brain is chemically predisposed to be modified by experiences, like clay when it is still soft, whereas the adult brain is predisposed to resist modification--like clay once it is hardened."
Would this not suggest that maybe we should be mentoring students out in the world as they confront real world problems rather than secluding them in safe-zones where the real world can barely be seen out the windows? Is this an argument for homeschooling? Or for some other paradigm worth inventing? “We learn how to regulate ourselves by being regulated,”
Steinberg explains the process by which that clay “hardens” by digging a little deeper into the structures of neurons as they develop. Early in their development, they carry electrical charges that have the ability to “leap” in a wide variety of directions, like a copper wire carrying electricity without any plastic covering. Over time, those neurons are encased in myelin (the plastic in the wire illustration) and that myelin covering reduces the amount of random connection making and enforces the strengths of desired pathways (lets call them a bat swing, a tune played on a piano, or a paintbrush stroke). As the young person decides what language they will speak, what skills they will need, what patterns of behavior will work to their advantage in life, the myelin surrounding neural pathways begins to work in favor of the desired learning being done by thickening and thus begins to “discourage” random “creativity.” “The amount of myelin in the brain increases well into our late forties,” says Steinberg, “insulating more and more brain circuits as we mature. “Axons retract, spines die off, and as a result, synapses start to disappear, often to the point that the circuit finally ceases to exist. This process is called ‘synaptic pruning.’”
“Ahhh,” says the mature grown-up. “That is what is wrong with the teenage brain.” Too much distractability. Not enough focus.”
“To the contrary,” says the teenager, “that is what is wrong with you old people. You are stuck in ruts!”
Steinberg neither puts the adolescent brain on a pedestal nor condemns it. It is what it is, and it has a long history of becoming what it is, and we are not going to change it by offering a few classes on executive function as though just knowing what your brain is doing is going to keep it from doing what it is doing. And yet, the author is not fatalistic. There are wise courses of action to take and unwise courses of action to take. He encourages working with the developing brain, not trying to subject it to torture like some cognitive version of Chinese foot-binding or Victorian era corset wearing.
Here are some recommendations.
First, don’t ignore the adolescent brain’s strengths or its weaknesses if you are someone who has some responsibility for helping teenagers mature. Make yourself familiar with the processes going on within and work with them, not against them. [This appeals to my inner Daoist]. “We learn how to regulate ourselves by being regulated,” he writes.
Second, recognize that the adolescent brain needs challenges to grow and develop. It does that developmental process no good to lock it up and protect it from the environment just as it does it no good to pretend that it does not need protection for its vulnerabilities. External regulation is essential as the adolescent brain learns to make use of its own “brakes.” “The slight mismatch between what we can do and what we push ourselves to do,” Steinberg writes,
“is what stimulates brain development. If the mismatch isn’t there or if it’s so great as to be overwhelming, development won’t occur.”
“In other words, it is important to be exposed to novelty and challenge when the brain is plastic not only because this is how we acquire and strengthen skills, but because this is how the brain maintains its ability to profit from future enriching experiences.”
“We know that brain plasticity in adulthood is facilitated by a mismatch between what the environment demands of the brain and what the brain can do. The less often we put ourselves in novel situations, the less frequently we encounter these mismatches. When this happens, and when the need to learn new things becomes less and less pressing, the brain begins to lose some of its malleability.”
Hear that. If challenges are made too easy or if the challenges are all artificial and disconnected from the real world in which teenagers live, “development won’t occur.” That is a tragedy and a tragedy that is compounded by the fact that the brain will literally activate that myelin hardening process when it begins to believe that the days of new experiences are over. The following paragraph has stunning implications for the way that we educate our teenagers:
“When we leave adolescence and stop seeking out new experiences, our brains shut down the final period of extensive plasticity. . . . Once we have what we need to survive on our own, it doesn't make any sense to remain malleable enough to be potentially harmed by unfavorable experiences.”
In other words, the worse thing we can do to a developing teenage brain is put it in an environment that causes that brain to think, “There is nothing new of any significance to learn.” At that moment, the cascade of “closing” the window begins, possibly for good.
Third, the author stresses that the learning of adolescents is inevitably affected by social forces. And this is not accidental or insignificant. The adolescent brain is wired for intensity of experience and seeks them out voraciously. But experiments demonstrate that the power and attractiveness of experiential rewards are magnified in the presence of other peers. An adult might look at a certain risk and say “The reward for that risk is not worth it.” And there conclusions about that estimate will not be affected by whether or not their friends are with them. But an adolescent will look at that exact same risk and reward combination and they will respond to the reward because it feels bigger than it does to the adult. As if that is not “bad enough” that reward will seem even sweeter if other adolescents are in the room … or even if they are in some other room.
“Things that feel good, feel better in adolescence,” Steinberg writes, “and things that feel bad, feel worse.”
“Compared to children or adults, it is easier to get adolescents to gamble even when their odds of winning are small or uncertain . . . Adolescents are just as likely as adults to know what's risky and what isn't, and no worse than adults at estimating whether doing something risky will lead to a bad consequence. . . . As this research shows, teenagers are fully capable of identifying risks; they're just drawn more strongly to rewards.”
Read on …
“Official statistics provide plenty of confirmation for our personal recollections: the presence of a group of teenage passengers in a car when a teenager is behind the wheel more than quadruples the chance of a crash and the risks of a crash increase sharply with each additional teen who is in the car.”
“Even when we make it impossible for teenagers to communicate with each other—that is, impossible to pressure each other into taking risks—simply knowing that their friends are nearby makes them take more chances.”
“In other words, it's not necessarily overt peer pressure that leads adolescents to do more reckless things with their friends. It's that being around friends when you are a teenager makes everything feel so good that you become even more sensitive to rewards than you ordinarily are, which leads you to take chances you would not ordinarily take.”
Why this is so is a matter of some conjecture but maybe the author puts his finger on it when he writes: “It hurts to be rejected at any age, but it's actually more painful during adolescence than at any other time.”
Ironically, Steinberg has more positive things to say about the adolescent brain than he has to say about the way adults in our present culture design systems to screw up those brains even more. “I don't harbor any delusions about the use of scientific evidence to inform policymaking, though,” he opines, “Policymakers and advocacy groups use science the way that drunks use lampposts – for support, not illumination.”
Eventually, we all do begin to “grow up” and for good or bad, “get with the program.” A few teenagers will remain teenagers as long as they can. Some will become rock stars or will film themselves for money like the producers of the TV show, “Jackass.” A few will remind us, Peter Pan like, that childhood and adolescence is to be preferred to adulthood and self-regulatory behavior in cubicle jobs. Maybe this is something of a service? I loved the illustration the author gave of a children’s soccer game where 22 kids run around the field within spitting distance of each other, an unorganized human stampede of randomness that follows the ball wherever it goes. I imagined coaching kids like that and trying to help them understand their “positions” on the field and the structures of intelligent play. This is, to some extent what we do when we raise young people to become responsible adults.
And yet, God, don’t those little kids have fun!”
Question for Comment: If there were some drug that would allow your brain to return to it adolescent form for a year, would you take it? Why or why not?
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