Qiaochu_Yuan comments on 2012 Survey Results - Less Wrong

80 Post author: Yvain 07 December 2012 09:04PM

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Comment author: Epiphany 01 December 2012 10:29:01AM *  8 points [-]

You know that, Katydee, but do all the people who are taking the survey think that way? The majority of them haven't even finished the sequences. I agree with you that it's ideal for us to be good rationalists all the time, but mental stamina is a big factor.

Being rational takes more energy than being irrational. You have to put thought into it. Some people have a lot of mental energy. To refer to something less vague and more scientific: there are different levels of intelligence and different levels of intellectual supersensitivity (A term from Dabrowski that refers to how excitable certain aspects of your nervous system are.) Long story short: Some people cannot analyze constantly because it's too difficult for them to do so. They run out of juice. Perhaps you are one of those rare people who has such high stamina for analysis that you rarely run into your limit. If that's the case, it probably seems strange to you that anybody wouldn't attempt to maintain a state of constant analysis. Most people with unusual intellectual stamina seem to view others as lazy when they observe that those other people aren't doing intellectual things all the time. It frequently does not occur to them to consider that there may be an intellectual difference. The sad truth is that most people have much lower limits on how much intellectual activity they can do in a day than "constant". If you want to see evidence of this, you can look at Ford's studies where he shows that 40 hours a week is the optimum number of hours for his employees to work. Presumably, they were just doing factory work assembling car parts, which (if it fits the stereotype of factory work being repetitive) was probably pretty low on the scale for what's intellectually demanding, but he found that if they tried to work 60 hours for two weeks in a row, their output would dip below the amount he'd normally get from 40 hours. This is because of mistakes. You'd think that the average human brain could do repetitive tasks constantly but evidently, even that tires the brain.

So in reality, the vast majority of people are not capable of the kind of constant meta-cognitive analysis that is required to be rational all the time. You use the word "ingrained" and I have seen Eliezer talk about how patterns of behavior can become habits (I assume he means that the thoughts are cached) and I think this kind of habit / ingrained response works beautifully when no decision-making is required and you can simply do the same thing that you usually do. But whenever one is trying to figure something out (like for instance working out the answers to questions on a survey) they're going to need to put additional brainpower into that.

I had an experience where, due to unexpected circumstances, I developed some vitamin deficiencies. I would run out of mental energy very quickly if I tried to think much. I had, perhaps, a half an hour of analysis available to me in a day. This is very unusual for me because I'm used to having a brain that loves analysis and seems to want to do it constantly (I hadn't tested the actual number of hours for which I was able to analyze, but I would feel bored if I wasn't doing something like psychoanalysis or problem-solving for the majority of the day). When I was deficient, I began to ration my brainpower. That sounds terrible, but that is what I did. I needed to protect my ability to analyze to make sure I had enough left over to be able to do all the tasks I needed to do each day. I could feel that slipping away while I was working on problems and I could observe what happened to me after I fatigued my brain. (Vegetable like state.)

As I used my brainpower rationing strategies, it dawned on me that others ration brainpower, too. I see it all the time. Suddenly, I understood what they were doing. I understood why they kept telling me things like "You think too much!" They needed to change the subject so they wouldn't become mentally fatigued. :/

Even if the average IQ at LessWrong is in the gifted range, that doesn't give everyone the exact same abilities, and doesn't mean that everyone has the stamina to analyze constantly. Human abilities vary wildly from person to person. Everyone has a limit when it comes to how much thinking they can do in a day. I have no way of knowing exactly what LessWrong's average limit is, but I would not be surprised if most of them use strategies for rationing brainpower and have to do things like prioritize answering survey questions lower on their list of things to "give it their all" on, especially when there are a lot of them, and they're getting tired.

Comment author: Qiaochu_Yuan 01 December 2012 11:36:01PM 0 points [-]

I'm not sure I can reliably recognize what mental fatigue feels like. I'd like to be able to diagnose it in myself (because I suspect that I have less mental energy than I used to), so do you know of any reasonably quick way to induce something that feels like mental fatigue, e.g. alcohol?

Comment author: [deleted] 02 December 2012 12:15:19AM *  2 points [-]

Alcohol doesn't induce mental fatigue in me; high temperatures and dehydration do. YMMV.

EDIT: So does not eating enough sugars.

Comment author: Epiphany 02 December 2012 12:14:36AM *  2 points [-]

Whatever your worst subject is, do a whole bunch of exercises in it until you start making so many mistakes it is not worth continuing. No need for alcohol, might as well wear out your brain.

It would be interesting to see if you'd get different types of fatigue from doing different kinds of activities. For instance, if I do three hours of math problems, I have trouble speaking after that - it's like my symbol manipulation circuitry is fried. (I have dyslexia, so that's probably related.) If I wear out my verbal processor (something that I think only started happening to me after I developed some unexpected vitamin deficiencies) this results in irritation. I can't explain myself very well, so people jump on me for mistakes, and it's really hard to tell them what I meant instead, so I get frustrated.

So, exercising each area of mental abilities might yeild different fatigue symptoms.

If you decide to experiment on yourself I'm definitely curious about your results!

Comment author: [deleted] 02 December 2012 11:59:26AM 2 points [-]

It would be interesting to see if you'd get different types of fatigue from doing different kinds of activities.

That happens to me, too.

Comment author: Epiphany 02 December 2012 08:06:29PM 2 points [-]

What are your fatigue symptoms? How much can you do of each activity before becoming fatigued?

Comment author: [deleted] 03 December 2012 11:28:14AM 1 point [-]

What are your fatigue symptoms?

If I've been reading/studying too long, I find much harder to concentrate and am more easily distracted by stray thoughts.

If I've been writing computer code/doing maths too long, I make the kind of trivial mistakes that screw up the results but are hard to locate way more often.

How much can you do of each activity before becoming fatigued?

It depends -- usually between 20 minutes and 3 hours.