Control your Destiny: How the Adolescent Brain Works

During your adolescence, which lasts from your early teens into your 20’s, the brain changes rapidly, you develop new abilities and capacities, and the habits of mind and skills you develop will last long into adulthood.

Abilities: The last part of the brain to develop is the Frontal Lobe. It’s responsible for reasoning and judgement — aka Executive Function. So, it’s somewhat understandable that teens often have poor impulse control — their Frontal Lobe (the prefrontal cortex in particular) is still developing.

The parts of the adolescent brain.

However that’s not an excuse. It is essential for adolescents to be held to account, because it’s only by practicing responsibility that they get to learn how to use their Executive thinking skills.

Because that’s how we learn — by practicing.

When we’re learning something new, brain cells, called neurons, reach out and connect to form networks. As we practice and focus on specific things — certain patterns of movement or certain ways of thought — some of the unused connections get pruned away, while others become stronger. The axons that connect the most-used pathways get coated in myelin, which acts as an insulator to make sure signals can pass quickly and efficiently.

Neurons in the brain transmit information to each other along long axons and across the synaptic gap.

By reorganizing the connections between brain cells, the brain learns and becomes better at what you’re practicing. Thus we gradually transition from novices to experts.

However, there is a cost.

Making strong pathways makes for quicker thinking about the things we’ve practiced, but makes our brains somewhat less flexible at learning new things. We develop habits of mind that stay with us for a long time.

Some of those habits we might not actually want to keep; and there’s also the possibility that we might not develop some habits of mind that we really would like to have.

The development of the frontal lobe during adolescence opens a window of opportunity for learning good judgement/executive function, but it does not mean we actually will learn it. We need to actually practice it.

So, if you would like to know yourself, want to be able to control yourself, and, especially, want to shape the future person you will become, then you’re going to have to figure out: which habits of mind you want to be practicing and which ones you don’t.

Learning to Learn from Your Mistakes

When students are able to recognize mistakes and analyze them, they will learn faster and deeper. Jonah Lehrer summarizes a new study that shows that people learn faster when they spend the effort to learn from their mistakes.

When people notice that they’ve made an error, they have an instinctive negative reaction. Then we have the choice to either ignore the error or spend some time considering it – and learning from it. Guess who learn faster?

This research is based on Carol Dweck’s work on mindset, which shows that it’s better to praise effort rather than intelligence. A willingness to work hard (grit) is a much better attitude for learners. It turns failures into learning experiences, while focusing on intelligence actually discourages people from trying things at which they might fail.

… people learn how to get it right by getting it wrong again and again. Education isn’t magic. Education is the wisdom wrung from failure.

— Lehrer (2011): Why Do Some People Learn Faster? in Wired.

Adolescents Versus Their Brains

The part of the brain responsible for logic and reasoning is slow to develop compared to the rest during our adolescence. As a result, adolescents are driven way too much by their emotions and instincts. This means that a lot of the time someone else, teachers and parents usually, have to provide that rationality for them, and help them develop those thinking skills for themselves.

That, at least, was my take-home message after reading David Walsh’s excellent book Why Do They Act That Way. He does an excellent job explaining how the brain develops during adolescence, how it affects the way teenagers behave, and some of the best approaches to dealing with it.

There are a lot of excellent details about how brain development interacts with hormones to create many of the behaviors we find typical of teenagers. Since puberty proceeds differently for girls and boys, Walsh also highlights the differences in the timing of development, and the contrasting results of the different hormones released.

Yet, he also recognizes that adolescent behavior is not solely the result of biology. The effects of neurological and hormonal changes are amplified in industrial societies where kids spend less time with parents, and more time with peers, than in non-WIERD cultures (see The Myth of Adolescent Angst) which leads into his approach to dealing with teens.

To address this unfortunate combination of nature and culture, Walsh advocates a structured approach to parenting, where rules are clear, reasonable, and enforced. This, however, needs to be balanced with the need to keep lines of communication open, which is not an easy trick. Teenagers will want to push you away, but it’s necessary to keep connected to them anyway.

He also emphasizes the need for mentoring good behavior and rational thinking, because, as we’ve seen before, while the developing pre-frontal cortex provides the capacity for formal thinking, it needs practice and training to work well. And, after all, two of the key things we ultimately look for in adults are self-control and the ability to think rationally.

This book is an extremely useful read for parents and teachers (though the first chapter is a bit slow for the impatient). It does a great job of explaining how biology affects behavior, and how to deal with them. I particularly like fact that Walsh has found that teens find it useful to know all this biology stuff too, and it affects how they behave.

Boys, girls, and blogs

There’s a curious and clear gender difference when it comes to my student’s use of their blogs. All the girls have them and most are posting things right now, but the boys don’t.

This is in large part due to the way I rolled out the student blogs. I started with a couple students (girls) who were most interested, and since then I’ve been setting up blogs for students as they’ve been requested. The process has been slow because I’ve been trying the multi-user version of WordPress (WPMU), which is not nearly as easy to set up as a stand-alone WordPress installation (like the one used for the Muddle). I think, however, that I have the setup process worked out now, so I could accelerate the rollout if necessary.

Since the two students I started with were girls, it’s perhaps not too surprising that it’s the other girls who were most interested in getting their own. That’s the way the social connections are arranged in our class.

Scattergram showing how girls' (red) brains mature differently than boys' (blue). Data from Lenroot, 2007.

Though there’s no real evidence for it, I do wonder, however, if there is a gender component to it too. Since girls tend to develop more quickly than boys at this age (see Sax, 2007 for a general description, and NIH, 2010 for a recent overview of adolescent brain development), so perhaps they’re more self-reflective. Girls also tend to emphasize interpersonal relationships more (e.g. Johnson, 2004), and are generally more communicative.

… females (1) develop more intimate friendships, (2) stress the importance of maintaining intimacy, and (3) expect more intimacy in their friendships than do males. — in Gender, grade, and relationship differences in emotional closeness within adolescent friendships by Johnson, (2004)

At any rate, I’m curious to see how this develops. I think I’m going to remind the whole class about the blogs though.

(Excel Spreadsheet used to create the brain volume scattergram: here.)

To teach effectively, you need to speak the same language

An interesting research project has shown that the same parts of the brain light up when you’re telling a story as when you’re listening to the story. So much so, that you begin to anticipate and parts of the your brain actually light up before the same parts in the storyteller’s. And the greater the synchronization, the greater the recall of the story.

The researchers found considerable synchronization between Silbert’s brain-activation patterns and those of her listeners as the story unfolded. For example, as Silbert spoke about her prom experience, the same areas lit up in her brain as in the brains of her listeners. In most brain regions, the activation pattern in the listeners’ brains came a few seconds after that seen in Silbert’s brain. But a few brain areas, including one in the frontal lobe, actually lit up before Silbert’s, perhaps representing listeners’ anticipating what she was going to say next, the team says. – Balter, 2010

That’s fascinating enough, but the control of their experiment was to have listeners listen to a story in a language they did not know. There was not the same synchronization. This means, if we extrapolate a little, that the amount of language comprehension determines how much you learn from a conversation, or hearing a story, or listening to a lecture, or even for understanding a set of oral instructions.

So if you want students to remember something you need to speak in their language. Language here refers not just to English versus Russian or whatever, but speaking using common idioms that the student is, like, you know, familiar with.

What Video Games Have to Teach Us about Learning and Literacy, by James Paul Gee

James Paul Gee has written a lot about this type of communication, and what it means for learning. He argues that meaning is situated, that is, how we understand something that is said to us depends a lot on our previous history and experiences. The most effective communication only really occurs within communities that have shared the same, or similar, experiences.

We are as teachers, of course, trying to expand student’s ability to use language, and introduce them to the language of different communities. But we should probably pay attention to how we speak in different contexts, and speak in their language when we want them to really remember something.

Fostering creativity

We know creativity is important, but how do we teach it? Po Bronson and Ashley Merryman have a fascinating article in Newsweek that is a superb advertisement for Montessori education. It posits, with extensive citation to back it up, that the increasing use of standardized curricula and testing is leading to decreased creativity in the U.S..

Of course you don’t teach creativity. Indeed, the arts, which are typically thought of as the first avenue for developing creativity, have no monopoly on the ability.

The age-old belief that the arts have a special claim to creativity is unfounded. When scholars gave creativity tasks to both engineering majors and music majors, their scores laid down on an identical spectrum, with the same high averages and standard deviations. Inside their brains, the same thing was happening—ideas were being generated and evaluated on the fly. – Bronson and Merryman, 2010.

Creativity can be developed with practice. When we’re being creative the brain starts by shifting through a whole bunch of different, vaguely relevant ideas at the same time. At some point some these ideas click together as the brain quickly recognizes some pattern and it focuses, focuses, focuses, encapsulating the pattern into some new insights and evaluating its possible effectiveness. It’s this mental shifting of gears from vague to precise, and the ability to focus attention on the specific problem that we improve on with practice. How:

… alternate maximum divergent thinking with bouts of intense convergent thinking, through several stages. Real improvement doesn’t happen in a weekend workshop. But when applied to the everyday process of work or school, brain function improves. – Bronson and Merryman, 2010.

They outline the steps to a project that practices creative thinking to solve solve a problem:

  • Start with fact-finding – what do we need to know to solve the problem.
  • Next scope out the possible problems.
  • Generate ideas.
  • Identify the best ideas.

Here the steps alternate from divergent thinking to convergent, general idea collection to focused thinking. They generate facts and ideas, then evaluate them rigorously. Creativity requires both types of thinking because either one is ineffective on its own.

In Montessori

The foundation for fostering this type of creativity in the classroom lies in developing a safe community. Clear rules reduce anxiety but leave room for exploration and curiosity. In the language of Montessori, this translates to developing a prepared environment and allowing freedom within boundaries.

Bronson and Merryman say this about the teacher:

When creative children have a supportive teacher—someone tolerant of unconventional answers, occasional disruptions, or detours of curiosity—they tend to excel. – Bronson and Merryman, 2010.

And they note this about the students:

They’re quitting because they’re discouraged and bored, not because they’re dark, depressed, anxious, or neurotic. It’s a myth that creative people have these traits. (Those traits actually shut down creativity; they make people less open to experience and less interested in novelty.) Rather, creative people, for the most part, exhibit active moods and positive affect. They’re not particularly happy—contentment is a kind of complacency creative people rarely have. But they’re engaged, motivated, and open to the world. – Bronson and Merryman, 2010.

I really like how the authors integrate the cognitive and neuroscience research into the article, to the great benefit of the more detail oriented among us. I always find remarkable how all this new science just continues to demonstrate Maria Montessori’s perceptiveness. The Montessori method is fundamentally designed to foster creativity.

This is a clear argument for the Montessori Method. I’ll certainly use this for my parent presentations and recruiting. As a teacher, however, it doesn’t hurt to be reminded of the importance of creating space for creativity. I like the way Bronson and Merryman put it:

In the space between anxiety and boredom was where creativity flourished. – Bronson and Merryman, 2010.

Fractured thinking – How the internet affects how you think

While many people say multitasking makes them more productive, research shows otherwise. Heavy multitaskers actually have more trouble focusing and shutting out irrelevant information, scientists say, and they experience more stress.

And scientists are discovering that even after the multitasking ends, fractured thinking and lack of focus persist. In other words, this is also your brain off computers. Richtel, 2010

Matt Richtel has an intriguing article in the New York Times on how multitasking on computers is affecting the way people think. I don’t have a whole lot of time to get into it is a well resourced article citing work from researchers such as Clifford Nass, Eyal Ophir and Melina Uncapher at Stanford, Steven Yantis at Johns Hopkins, Daphne Bavelier at the University of Rochester, Gary Small at UCLA and Adam Gazzaley at UCSF.

Other choice quotes:

[Multi-taskers] had trouble filtering out … the irrelevant information.

multitaskers tended to search for new information rather than accept a reward for putting older, more valuable information to work.

that people interrupted by e-mail reported significantly increased stress compared with those left to focus. Stress hormones have been shown to reduce short-term memory

Finally, the article ends with a thought about how technology use affects our ability to relate to others.

Mr. Nass at Stanford thinks the ultimate risk of heavy technology use is that it diminishes empathy by limiting how much people engage with one another, even in the same room.

“The way we become more human is by paying attention to each other,” he said. “It shows how much you care.”

That empathy, Mr. Nass said, is essential to the human condition. “We are at an inflection point,” he said. “A significant fraction of people’s experiences are now fragmented.”

This work of course ties in with Nicholas Carr’s thesis that asks the question, “Is Google Making Us Stupid“. Carr’s book, “The Shallows” takes up the argument that we should spend less time online. While I tend to agree with Carr that we would benefit from more time offline, I really think his explanation that the invention of the press, and cheap books, lead to more deeper concentration (and that’s what we’re loosing now) needs a lot more evidence to back it up.

Daydreaming …

Focused work. We like to see our students focused on their work and we give them long blocks of time to do so. It is hard, however, for anyone to stay on task for two hours straight. You have to allow for a certain amount of mind wandering and daydreaming. What a lot of neurologic research is uncovering is that zoning-out is an essential part of putting the pieces together and helps with learning.

When we are no longer even aware that our minds are wandering, we may be able to think most deeply about the big picture. – Zimmer (2010)

Daydreaming by Edward Harrison May (1876) (from Wikimedia Commons).

While we sleep the brain assembles information into coherent patterns, helping us learn and process emotions. Carl Zimmer has an article in Discover Magazine on how unfocused daydreaming accomplishes the same thing.