Moral Development in the Brain

If someone takes something of yours from your locker, does it matter if they intended to steal, or if they grabbed it by mistake because they thought it was their locker? We see there is a moral difference here, because people’s intentions and beliefs matter. An inadvertent mistake is one thing, but intentionally stealing is another.

We can see the difference, but typically, children under six do not. They see both things as just as bad, because they do not consider intentions.

The temporoparetial junctions. Image by the Database Center for Life Science, via Wikimedia Commons.

A recent study (Young et al., 2010) found the part of the brain that seems to be responsible for the consideration of intentions in moral judgment. This part of the brain, the right temporoparietal junction, develops between the ages of six and eleven.

I find this work fascinating because it implies that adolescents may still be developing the ability for deeper moral judgment when they get to middle school. It would help explain why they will sometimes make the argument that if the outcome did no harm then any transgression does not matter; taking something from someone’s locker is not that important if they get caught at it and have to return it.

Just like adolescents have to exercise our abstract thinking skills in order to fully develop and hone them, students probably need to practice and think about what morality means.

I think I’m going to have to figure out a framework for talking about morality for next cycle’s Personal World.

Note: Another interesting article on the role of the temporoparietal junction in meta-cognition.

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.)

Symbols versus ideas

Where facts exceed curiosity, we end up relying on symbols and symbolic language that are weighted with emotional meaning that are detached from ideas, according to Walter Lippmann as described by Geoffrey Nunberg on On The Media this weekend.

I think you can see this fairly clearly with adolescents. When they lack the interest, motivation, curiosity and information they tend to resort to slogans and cliché’s instead of looking up information or making thoughtful, logical arguments.

It also may be a marker for cognitive development, though interestingly, in my experience, it seems that more abstract thinking leads to less use of symbology and more reasoning. Partly, I suspect, its because they’re also acquiring the language to express more complex ideas, but adolescent education needs to include lots of opportunities for logically taking apart symbols.

I’ve started a pattern in class that I’ve noticed students picking up with each other.

If someone says something like, “It was good,” I ask, “Why?”

If they say, “I liked it,” I say, “Because?”

Often the first answer is along the lines of, “Because it was good,” but persistence with the whys’ and becauses’ will usually lead to some actual information and ideas. Over time, the mining process gets easier as students come to expect it and realize what you’re aiming for.

On The Media: Waste, Fraud and Abuse:

PBS’s Inside the Teenage Brain is online (for free)

The full FRONTLINE documentary, Inside the Teenage Brain can be found online at PBS’s website. PBS has an entire website dedicated to the documentary which includes transcripts of interviews with neuro and cognitive scientists.

This is an excellent program (and website) that really delves into a lot that is counter-intuitive about adolescents. It is strongly recommended for both teachers and students, because it goes into the fundamental question of why your teens seem like aliens. Indeed, it describes the type of research upon which the Montessori Middle School program is based.

Abstract thinking and brain development

CT scan from the Visible Human Project.

Different parts of the brain mature at different rates. By early adolescence the parts of the brain responsible for social interaction are pretty well developed, but the parts responsible for critical thinking and impulse control (the frontal cortex) are not.

We visited the Le Bonheur Children’s Hospital today. And after a tour, a couple of people from the neurological division gave us a nice little presentation about the human brain. They used Rita Carter’s DVD, “The Human Brain“, which has a great animation of electrical signals pulsing from neuron to neuron through the neural network. I’m considering getting it for the class because the animations and the interactive slicing of the human brain are pretty neat. You can, however, find some, free applications for looking at the whole human body from the Visible Human Project.

Anyway, the fact that impulse control and critical thinking abilities are late to develop did not require fancy brain imaging to discover. Jean Paiget’s research on cognitive developmental stages found evidence that abstract thinking did not develop until the early teens. In fact, he found that abstract thinking (or formal operations as he called it) did not necessarily develop at all. As the frontal cortex matures, the ability to do abstract thinking also develops, but that does not necessarily mean that everyone learns how to do it. (At this point I make an unbiased pitch for the Montessori approach opposed to traditional schooling).

It’s very nice, or perhaps a better word is “elegant”, when very different types of research, using fundamentally different methods come to the same conclusions. In this case, neuroscience (brain imaging), which is ultimately based on physics and biology corroborates the psychological research into cognitive development, which is primarily based on observation and survey.

From novices to experts

Socrates teaching (from Wikimedia Commons).

The primary role of an instructor is to transform a novice into an expert within a given subject area. – Cooper (1990)

The above quote comes from a paper on instructional design by Graham Cooper. I don’t quite agree with it entirely since it does not seem to allow for a well rounded view of a student as an individual, or the Socratic ideal, but it does seem applicable to the more strictly academic areas in the middle school curriculum.

In order to figure out what distinguishes experts from novices, cognitive scientists have spent a lot of time observing the two groups. Their key finding has been that as you become an expert on a topic, you construct mental pictures (or schemes) of the shapes of problems, so when you encounter a new problem you can just fit the new problem to the mental pictures you have and see which best fits. It’s a bit like learning rules of thumb that apply to different situations. When a problem comes up, the expert can quickly whip out the right rule of thumb from their mental back pocket while the novice, though equally smart, needs to figure out all the steps with some degree of trial and error.

This is a nice perspective when it comes to teaching something like solving equations, but I think one important distinction of the Montessori philosophy is the belief that adolescents should also be learning flexibility, and be capable of dealing with novel problems. Because adolescence is when students are just becoming able to think abstractly (at least according to Paiget), and abstract thinking needs to be practiced, it is necessary that students encounter novel, challenging problems on a regular basis.

Pangea breakup in reverse (adapted from image in Wikimedia Commons).

A lot of creative and problem solving thinking comes from hashing out new problems. In a globalized world, where technology is capable of dealing with routine tasks, be they constructing a car or solving a series of equations, creative problem solving is becoming a more and more valuable skill. Especially now that “The World is Flat“.

The importance of thinking about thinking

Know thyself - Socrates (and others) from Wikimedia Commons.

Personal World is the time for introspection. Every day students get a chance to think about themselves and, hopefully, about how they think. Thinking about your own thinking is called meta-cognition, and there is growing scientific evidence that it is an important life skill that leads to better decision making.

According to Jean Paiget’s theory of cognitive development students only begin to develop the capacity for abstract and meta-cognitive thinking in the middle school years. However, further research has shown that only about 30-35% of high schoolers actually develop the skill (it’s called “formal thinking” or “formal operations“). The brain develops the capacity for formal thinking in early adolescence, but people do not naturally move into that stage; school and the right environment are important.

For formal operations, it appears that maturation establishes the basis, but a special environment is required for most adolescents and adults to attain this stage. – Huitt, W., & Hummel, J. (2003)

The requirement that students spend some time in introspection is one key way that Montessori adolescent programs try to promote formal thinking.

Finally, Jonah Lehrer, a journalist who writes a lot about how people think and makes decisions, points out the importance of metacognition in the qualities that make for a good president.

some studies suggest that when confronted with a complex decision – and the decisions of the president are as complex as it gets – people often do best when they rely on their gut feelings …
However, it has also become clear that listening to your instincts is just a part of making good decisions. The crucial skill, scientists are now saying, is the ability to think about your own thinking, or metacognition, as it is known. Unless people vigilantly reflect on how they are making an important decision, they won’t be able to properly use their instincts, or know when their gut should be ignored. Indeed, according to this emerging new vision of decision-making, the best predictor of good judgment isn’t intuition or experience or intelligence. Rather, it’s the willingness to engage in introspection” – (Lehrer, 2008; emphasis mine)

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