Seth's Blog

• A skeptical look at Karl Popper by Martin Gardner
• Effects of food on the brain
• fat sensitivity correlates with BMI (less sensitive, greater BMI)
• Bill McKibben on Climategate: “If you managed to hack 3,000 emails from some scientist’s account, you might well find a few that showed them behaving badly, or at least talking about doing so.” This gives new meaning to the term denialist.
• if someone steals $2 million do you still trust their research?

Thanks to Vic Sarjoo, Anne Weiss, and Marian Lizzi.

Yesterday I blogged about a sudden improvement in how fast I could do arithmetic. The improvement was much larger than normal variation and happened after I did four things that I rarely did. In chronological order:

1. Ate about 30 g of butter.

2. Stood on a cobblestone mat (for 5 minutes, which was all I could bear).

3. Stood during the test.

4. Walked for 10 minutes just before the test.

To find out which mattered, I did them again in the same order and at the same times of day, but with tests before and after each one.  If performance suddenly improved after one of them, then I’d know.

Here’s what actually happened.

The last six points are the relevant results. The first of the six points (627 msec) was before everything. The second (613 msec) was after butter but before the cobblestones. The third (630 msec) was after the cobblestones but before standing. The fourth (610 msec) and fifth (603 msec) were while standing but before walking. The final one (581 msec) was while standing after walking.

I was surprised and pleased how closely the first and last scores repeated the earlier difference. The first score was close to the previous baseline; the last score was close to the previous outlier. A big improvement seems to be under my control.

Before doing these tests, my best guess about what caused the improvement was the walking. But the scores were improving before the walking so that’s unlikely. Perhaps the walking was one of several factors that helped. The data suggest, if anything, a shocking conclusion: butter made my brain work better. An alternative, less consistent with Occam’s razor, is that butter, standing, and walking all produced smaller improvements, which together added up to the big improvement. The cobblestones produced a short-lived decrement.

That pork fat improved my sleep obviously supports the butter interpretation. I should be less surprised than anyone else, but still . . . Last week I noticed something else that supports the butter explanation. At a restaurant with a friend, the waiter brought bread and olive oil. I asked for butter. I spread all of it on a piece of bread, then asked for more butter, and spread all of that on another piece of bread. (About 30 g butter total.) It was the first time I’d eaten a large amount of butter at a meal. An hour or so later, I felt unusually good, some combination of calm and warmth. I never noticed this after eating pork fat, but butter may be to pork fat as hamburger is to steak: Easier to digest. The pork fat is within cell walls; the butter fat isn’t.

For a few years, I’ve been making daily measurements of how well my brain works. I got the idea after I found that omega-3 (from flaxseed oil) improves my balance. It improved other mental functions as well. Tim Lundeen, using an arithmetic test, found similar results. These results suggested to me there might be a lot we don’t know about how our environment affects our brain.

If so, tracking myself might turn up interesting anomalies — clues to big environmental effects. The first one I found involved flaxseed oil. There turned out to be a short burst of improvement after I took it. The second anomaly I found also involved flaxseed oil. When I switched from Chinese flaxseed oil to American flaxseed oil (Spectrum Organic), a few days later my arithmetic scores suddenly improved. Something was wrong with the Chinese flaxseed oil.
The third revealing anomaly — which doesn’t involve flaxseed oil — happened yesterday (see below). Each point on the graph is one testing session.  Each session consists of 32 simple arithmetic problems (e.g., 3+5, 7-6) and takes about 3 minutes. I use R on my laptop to collect the data. I type the answer or the last digit of the answer (e.g., if the answer is 13 I type “3″) as fast as possible. Here are the results from almost a year of this task:

The Y axis is the time it took to do one problem. Yesterday, the graph shows, I suddenly got much faster. My score dropped about 50 msec — far more than normal variation.

What caused the drop? I can think of four possibilities:

1. The test was standing. Usually I test myself sitting.

2. The test happened after I’d been walking on my treadmill for 10 minutes. That too was very rare.

3. I’d had about 30 g of butter 2 hours earlier.

4. I’d stood on my cobblestone mat 2 hours earlier.

My guess is that it’s #2 (10 min walking). The previous record low score, in January, might have come after I did Dance Dance Revolution for 30 minutes or so.

Everyone knows about RDAs (Recommended Daily Allowances) of various nutrients. In a speech to new University of Washington students, David Salesin, a computer scientist, advised them to “maintain balance” by getting certain experiences daily:

• something intellectual [such as a computer science class] (not so hard in college);
• something physical (like running, biking, a team sport);
• something creative (like music, art, or writing); and
• something social (like lunch with a friend).

This served him well in college, he said, and he continued it after college.

I think he’s right — we need certain experiences to be healthy just as we need certain nutrients. My rough draft of such a list would be this: 1. Social. 2. Physical. Nassim Taleb’s ideas about exercise seem as good as anyone’s. This is really several requirements, for different sorts of exercise. 3. Travel. About an hour per day. 4. Hunger. The data behind the up-day-down-day diet suggest we should experience a substantial amount of hunger every week. 5. Face-to-face contact in the morning. About an hour. 6. Morning sunlight. An hour? 7. Being listened to. I suspect the therapeutic value of psychotherapy derives from this. I believe this is one reason blogging is popular — it provides a sense of being listened to. 8. Being helpful. 9. Being recognized as having value. Blogging helps here, too. 10. Being part of a group effort, something larger. Of course #1 (social) and #5 (morning faces) can come from the same experience, and so can #2 (physical) and #3 (travel). I wouldn’t say we need #7-#10 every day but perhaps several times per week.

I might add two more things: 11. Learning. After I started studying Chinese via Anki/treadmill, I started to sleep better. It wasn’t the treadmill; that wasn’t new. Several studies have found that people sleep more when they are learning intensely. After I became a professor, instances of concentrated learning — such as learning to use R — became rare. I remember how good they felt. How intense learning could go on throughout your life during the Stone Age isn’t obvious, however. Presumably all the experiences we need to be healthy were easily available then. 12. Foot stimulation. In a Beijing park, I came across a cobblestone track about a hundred yards long. Walking on it is supposed to be beneficial. I took off my shoes and socks and tried it. I was astonished how painful it felt — but day by day I could stand on it longer. This is a topic for another post but of course in the Stone Age people got a lot more foot stimulation than anyone reading this. Commercial cobblestone track. Thanks to Tim Lundeen for reawakening my interest in this.

I liked many things about this talk by Jacqueline Edelberg, a Chicago artist and political science Ph.D., about how she and other moms transformed their local school. Edelberg has written a book about it called How to Walk to School: Blueprint for a Neighborhood Renaissance. The man who introduced her told a story: In a classroom, he noticed a girl drawing a picture. What are you drawing? he asked. I’m drawing God, she said. You can’t do that. No one knows what God looks like, he said. They will soon, she said.

Edelberg’s story did sound miraculous: Her crummy neighborhood public school, within a year, became an acceptable place for her children. The change had many elements, including an after-school program, a farmer’s market, and painted doors, but I think the most important piece — which Edelberg said little about  — was this: Parents were allowed to attend every class. Within two years, said Edelberg, all the bad teachers left.

I call this way of governing top and bottom versus middle. In this case the top was the school’s principal (Susan Kurland, Edelberg’s co-author), the bottom was the parents, and the middle was the teachers. Acting alone, the principal couldn’t control the teachers — she couldn’t fire the bad ones, for example. With the parents’ help, she could control them.

It’s as old as Moses:

1. As I’ve blogged, the Ten Commandments was an agreement between Moses (top) and the preyed-upon men in his community (bottom) against the men who were preying upon them (middle) — stealing from them, for example.

There are other examples:

2. One reason surgical checklists — implemented by hospital administration (top) — work so well, I believe, is that they give nurses (bottom) power over doctors (middle). A nurse can tell a doctor to follow the checklist. The details of implementation also empower the lower-ranking members of the surgical team.

3. In China, what are called (in Chinese) human-flesh searches — a kind of cyber-vigilante-ism — go on with the approval of the central government (top). These searches, which are actually mini-crusades, allow ordinary citizens (bottom) to punish corrupt or otherwise misbehaving local government officials (middle).

I predict that someday someone in the American government (top) will realize that a way to greatly improve health care is to empower patients (bottom) against doctors (middle).