Related to: The Psychological Unity of Humankind, Instrumental vs. Epistemic: A Bardic Perspective

"Everyone generalizes from one example. At least, I do."

   -- Vlad Taltos (Issola, Steven Brust)

My old professor, David Berman, liked to talk about what he called the "typical mind fallacy", which he illustrated through the following example:

There was a debate, in the late 1800s, about whether "imagination" was simply a turn of phrase or a real phenomenon. That is, can people actually create images in their minds which they see vividly, or do they simply say "I saw it in my mind" as a metaphor for considering what it looked like?

Upon hearing this, my response was "How the stars was this actually a real debate? Of course we have mental imagery. Anyone who doesn't think we have mental imagery is either such a fanatical Behaviorist that she doubts the evidence of her own senses, or simply insane." Unfortunately, the professor was able to parade a long list of famous people who denied mental imagery, including some leading scientists of the era. And this was all before Behaviorism even existed.

The debate was resolved by Francis Galton, a fascinating man who among other achievements invented eugenics, the "wisdom of crowds", and standard deviation. Galton gave people some very detailed surveys, and found that some people did have mental imagery and others didn't. The ones who did had simply assumed everyone did, and the ones who didn't had simply assumed everyone didn't, to the point of coming up with absurd justifications for why they were lying or misunderstanding the question. There was a wide spectrum of imaging ability, from about five percent of people with perfect eidetic imagery1 to three percent of people completely unable to form mental images2.

Dr. Berman dubbed this the Typical Mind Fallacy: the human tendency to believe that one's own mental structure can be generalized to apply to everyone else's.

He kind of took this idea and ran with it. He interpreted certain passages in George Berkeley's biography to mean that Berkeley was an eidetic imager, and that this was why the idea of the universe as sense-perception held such interest to him. He also suggested that experience of consciousness and qualia were as variable as imaging, and that philosophers who deny their existence (Ryle? Dennett? Behaviorists?) were simply people whose mind lacked the ability to easily experience qualia. In general, he believed philosophy of mind was littered with examples of philosophers taking their own mental experiences and building theories on them, and other philosophers with different mental experiences critiquing them and wondering why they disagreed.

The formal typical mind fallacy is about serious matters of mental structure. But I've also run into something similar with something more like the psyche than the mind: a tendency to generalize from our personalities and behaviors.

For example, I'm about as introverted a person as you're ever likely to meet - anyone more introverted than I am doesn't communicate with anyone. All through elementary and middle school, I suspected that the other children were out to get me. They kept on grabbing me when I was busy with something and trying to drag me off to do some rough activity with them and their friends. When I protested, they counter-protested and told me I really needed to stop whatever I was doing and come join them. I figured they were bullies who were trying to annoy me, and found ways to hide from them and scare them off.

Eventually I realized that it was a double misunderstanding. They figured I must be like them, and the only thing keeping me from playing their fun games was that I was too shy. I figured they must be like me, and that the only reason they would interrupt a person who was obviously busy reading was that they wanted to annoy him.

Likewise: I can't deal with noise. If someone's being loud, I can't sleep, I can't study, I can't concentrate, I can't do anything except bang my head against the wall and hope they stop. I once had a noisy housemate. Whenever I asked her to keep it down, she told me I was being oversensitive and should just mellow out. I can't claim total victory here, because she was very neat and kept yelling at me for leaving things out of place, and I told her she needed to just mellow out and you couldn't even tell that there was dust on that dresser anyway. It didn't occur to me then that neatness to her might be as necessary and uncompromisable as quiet was to me, and that this was an actual feature of how our minds processed information rather than just some weird quirk on her part.

"Just some weird quirk on her part" and "just being oversensitive" are representative of the problem with the typical psyche fallacy, which is that it's invisible. We tend to neglect the role of differently-built minds in disagreements, and attribute the problems to the other side being deliberately perverse or confused. I happen to know that loud noise seriously pains and debilitates me, but when I say this to other people they think I'm just expressing some weird personal preference for quiet. Think about all those poor non-imagers who thought everyone else was just taking a metaphor about seeing mental images way too far and refusing to give it up.

And the reason I'm posting this here is because it's rationality that helps us deal with these problems.

There's some evidence that the usual method of interacting with people involves something sorta like emulating them within our own brain. We think about how we would react, adjust for the other person's differences, and then assume the other person would react that way. This method of interaction is very tempting, and it always feels like it ought to work.

But when statistics tell you that the method that would work on you doesn't work on anyone else, then continuing to follow that gut feeling is a Typical Psyche Fallacy. You've got to be a good rationalist, reject your gut feeling, and follow the data.

I only really discovered this in my last job as a school teacher. There's a lot of data on teaching methods that students enjoy and learn from. I had some of these methods...inflicted...on me during my school days, and I had no intention of abusing my own students in the same way. And when I tried the sorts of really creative stuff I would have loved as a student...it fell completely flat. What ended up working? Something pretty close to the teaching methods I'd hated as a kid. Oh. Well. Now I know why people use them so much. And here I'd gone through life thinking my teachers were just inexplicably bad at what they did, never figuring out that I was just the odd outlier who couldn't be reached by this sort of stuff.

The other reason I'm posting this here is because I think it relates to some of the discussions of seduction that are going on in MBlume's Bardic thread. There are a lot of not-particularly-complimentary things about women that many men tend to believe. Some guys say that women will never have romantic relationships with their actually-decent-people male friends because they prefer alpha-male jerks who treat them poorly. Other guys say women want to be lied to and tricked. I could go on, but I think most of them are covered in that thread anyway.

The response I hear from most of the women I know is that this is complete balderdash and women aren't like that at all. So what's going on?

Well, I'm afraid I kind of trust the seduction people. They've put a lot of work into their "art" and at least according to their self-report are pretty successful. And unhappy romantically frustrated nice guys everywhere can't be completely wrong.

My theory is that the women in this case are committing a Typical Psyche Fallacy. The women I ask about this are not even remotely close to being a representative sample of all women. They're the kind of women whom a shy and somewhat geeky guy knows and talks about psychology with. Likewise, the type of women who publish strong opinions about this on the Internet aren't close to a representative sample. They're well-educated women who have strong opinions about gender issues and post about them on blogs.

And lest I sound chauvinistic, the same is certainly true of men. I hear a lot of bad things said about men (especially with reference to what they want romantically) that I wouldn't dream of applying to myself, my close friends, or to any man I know. But they're so common and so well-supported that I have excellent reason to believe they're true.

This post has gradually been getting less rigorous and less connected to the formal Typical Mind Fallacy. First I changed it to a Typical Psyche Fallacy so I could talk about things that were more psychological and social than mental. And now it's expanding to cover the related fallacy of believing your own social circle is at least a little representative of society at large, which it very rarely is3.

It was originally titled "The Typical Mind Fallacy", but I'm taking a hint fromt the quote and changing it to "Generalizing From One Example", because that seems to be the link between all of these errors. We only have direct first-person knowledge one one mind, one psyche, and one social circle, and we find it tempting to treat it as typical even in the face of contrary evidence.

This, I think, is especially important for the sort of people who enjoy Less Wrong, who as far as I can tell are with few exceptions the sort of people who are extreme outliers on every psychometric test ever invented.


Footnotes

1. Eidetic imagery, vaguely related to the idea of a "photographic memory", is the ability to visualize something and have it be exactly as clear, vivid and obvious as actually seeing it. My professor's example (which Michael Howard somehow remembers even though I only mentioned it once a few years ago) is that although many people can imagine a picture of a tiger, only an eidetic imager would be able to count the number of stripes.

2. According to Galton, people incapable of forming images were overrepresented in math and science. I've since heard that this idea has been challenged, but I can't access the study.

3. The example that really drove this home to me: what percent of high school students do you think cheat on tests? What percent have shoplifted? Someone did a survey on this recently and found that the answer was nobhg gjb guveqf unir purngrq naq nobhg bar guveq unir fubcyvsgrq (rot13ed so you have to actually take a guess first). This shocked me and everyone I knew, because we didn't cheat or steal during high school and we didn't know anyone who did. I spent an afternoon trying to find some proof that the study was wrong or unrepresentative and coming up with nothing.

Generalizing From One Example
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I'm glad to see someone bringing up the topic of seduction, and how it relates to rationality, and how attitudes inside and towards the seduction community relate to rationality and biases.

I'm going to give a big warning to everyone on this topic. The seduction community is an expansive and heterogenous phenomenon. Unless someone has some experience of the community (say 30+ hours of reading of multiple gurus with different philosophies, and they have gone out and tried the approaches the community advocates or seen real pickup artists in action), then it is virtually impossible to understand what it involves and describe it in a way that isn't skewed.

Elana Clift's honors thesis is a good place to start.

Yvain, you are right to take the mass perceptions of people of each sex as evidence (though evidence of what is unclear, so far). Let me unpack a few things:

There are a lot of not-particularly-complimentary things about women that many men tend to believe. Some guys say that women will never have romantic relationships with their actually-decent-people male friends because they prefer alpha-male jerks who treat them poorly. Other guys say women want to be lied to and tricked.

The... (read more)

4dclayh
Upvoted for spelling "extravert" correctly :)
5dclayh
Wow, I'm highly amused and somewhat surprised at the vitriolic reaction to this innocent little comment.
7John_Maxwell
Me too, but I think we should use extrovert now that it's in common use.
5MTGandP
Going back to ~1920, "extrovert" has been pretty consistently more popular.
1taryneast
Awesome comment - lots of good info here. Thanks.
-6Lewsome
[-]bill740

Interesting illustration of mental imagery (from Dennett):

Picture a 3 by 3 grid. Then picture the words "gas", "oil", and "dry" spelled downwards in the columns left to right in that order. Looking at the picture in your mind, read the words across on the grid.

I can figure out what the words are of course, but it is very hard for me to read them off the grid. I should be able to if I could actually picture it. It was fascinating for me to think that this isn't true for everyone.

[-]pjeby210

Picture a 3 by 3 grid. Then picture the words "gas", "oil", and "dry" spelled downwards in the columns left to right in that order. Looking at the picture in your mind, read the words across on the grid.

Interestingly, I find the task much easier if I do it the other way: visualizing the words spelled across, and then reading off the words going down the grid.

If mental images consist of replayed saccades, this makes perfect sense. To generate the downward images of words and then read across would reasonably be harder than simply replaying the stored "across" patterns, and then reading them down. IOW, visualization is more like vectors and sprites than it is like pixels -- which reflects how sight itself works.

3Victor Novikov
I can't do it. I can picture the grid, but the letters dissolve into formless shapes as soon as I "let go" of them. I cannot seem to actually hold the 3x3 grid of specific letters in my visual imagination.
9[anonymous]
That is interesting. Any attempt I make to read off the grid seems to involve recreating the grid about nine times. On the other hand I have no particular difficulty mentally enumerating rapidly over character arrays.
8MBlume
TAWME (This Agrees With My Experience)
6John_Maxwell
Same here. Is there anyone who does it with no trouble? If so, I'm envious.
2MichaelHoward
I bet with the right training we could learn to do this, and on bigger grids too.
3faul_sname
I can't, at all. And I find this extremely odd, as I've always thought of myself as someone with extremely good visual-spatial skills, and can picture and rotate quite complex objects in my mind. I can also do it if, instead of those words, they are a series of 9 numbers. I would speculate as to what's going on here, but I have no idea whatsoever. It's been 36 hours since I last slept, so that may also have something to do with it. I'll see if I can do it after I sleep (it might have something to do with working memory, which is currently not operating at full capacity).

I can't either, but I wonder if I might have been able to as a child. My spacial reasoning skills have always been terrible (which is probably responsible for my absolutely appalling sense of direction; I have literally gotten lost in a straight line on multiple occasions,) but my perception is that I had a much more powerful visual imagination as a child. I could actually visually "see" fabricated images overlaid over real scenery if I so chose (but not indefinitely, I needed cooldown time between images.) I haven't had any such ability since at least the time I became a teenager, probably earlier.

That's not the only mental faculty I've lost in the process of growing up either. I remember in kindergarten my teacher complained that I needed to pay attention to the lesson, while I was clearly diverting my attention to something else, and I told her I was quite capable of paying attention to both. She understandably didn't believe me, until I proved to her that I could listen to two separate audio recordings simultaneously, one in each ear, and afterwards, recite the content of both. Today, my ability to split my attention is terrible, and it boggles my mind that I was ever capable of this.

7faul_sname
I can still see images overlaid, or more accurately shapes and densities. I can't give the things I imagine color or even shadings, but I can picture objects and their spatial relations to each other. I think that I am not visually picturing the numbers when I imagine the grid of numbers, but rather that my mind treats them as primitive objects that can be put in a grid pattern. I can do that with letters, but not when I consider them as part of a word (my mind is weird, even by my standards). So I can imagine geometric shapes in 2 and 3 dimensions (I've gotten 4 on occasion, but it's not easy and rotating those shapes makes it feel like my brain is about to overheat), but I can't picture a scene to paint it. I have the same memory of being able to split my attention between two tasks, but I'm not sure that memory is accurate. Instead, I think I may just have a very good ability to cache the last 30 seconds or so of my life. The reason I think that is that when I was in elementary school (either 1st or 4th grade, I don't recall which), I spent most of my time in class reading. When the teacher would ask me what she just said, I could answer pretty much verbatim. However, I didn't retain any of the information given for history (which I have attributed as me being bad with history, but is actually probably that I was exposed to all of the other subjects outside of the classroom and so didn't notice that I wasn't learning). So it seems likely that I was caching but not processing what the teachers. I can still cache conversations very well, so that if I'm writing a paper, and my roommate will ask me a question, I can finish the sentence I'm writing and then process and answer the question. I wonder how consistent my abilities are. Specifically, I wonder if I'll have the same subjective experience of cognition and mental imagery in a year, or if it changes from day to day. Because it may be that we not only assume that everyone else experiences cognitive phenomena t
2TropicalFruit
I think my inability to image form like this is why I've always been so bad at chess.  I can really only hold an image of one word in my mind. If I want to read "God" on the top, I completely lose the second and third rows. I can also write in "Gas" in the first column and read it (barely), but the second I add the second word, everything gets blurred (abstractly). The information just... isn't there. Despite this, I'm extremely good at mental rotations... which seems strange because it's also visual imagery. Somehow, I'm a lot better at holding a shape in my mind and rotating it, than I am at holding a grid in my mind and writing on it. Growing up always being told how smart I was, it was kind of jarring to be so bad at a simple intelligence task like visual imagery. Chess gave me the hint - in every other game, I'd be trivially top 20% or so after just learning the rules, but in chess, I had to grind for like a 1500 ELO, and just auto-piloting, I can't even play at a 1200 level consistently. Good life lesson I guess though.
2Cyan
I wonder if the ability to play blindfold chess is related to the ability to perform with exercise.
1[anonymous]
From what I have read, rather little. The process of developing expertise in chess involves dedicating whole areas of the cortex to representations of important chess piece layouts. These representations can then be manipulated rapidly in very nearly the way a novice would manipulate working memeory. Generic reproduction of a physical chess board would be almost trivial in comparison to the memory structures developed by the chess experts.
1Michael Roe
I think of myself as a good visualiser, but I found this task quite hard. I had to visualise reading each of the words about. 5 times before the whole 3x3 grid became stable and I could read it horizontally,

Maybe I'm just cynical but I think people vastly overestimate their own goodness. Often "goodness" is just a way to dress up powerlessness. Like an overweight man might say he's "stocky" or an overweight woman might say she's "curvy," so an undesirable or shy man or woman might emphasize the upside: "I would never cheat." There's a version of the typical mind fallacy in there: a person might genuinely think they would never cheat but be extrapolating from a position where the opportunity rarely presents itself. We can all talk about how, if we were in a position of political power, we'd never succumb to bribes or cronyism because we don't have any political power. It both makes us look good and, as far as we know, it's true. I think testimony, especially when it comes to ones moral worth, is the least valuable form of data available.

[-]bill420

When I've taught ethics in the past, we always discuss the Nazi era. Not because the Nazis acted unethically, but because of how everyone else acted.

For example, we read about the vans that carried Jewish prisoners that had the exhaust system designed to empty into the van. The point is not how awful that is, but that there must have been an engineer somewhere who figured out the best way to design and build such a thing. And that engineer wasn't a Nazi soldier, he or she was probably no different from anyone else at that time, with kids and a family and friends and so on. Not an evil scientist in a lab, but just a design engineer in a corporation.

One point of the discussion is that "normal" people have acted quite unethically in the past, and how can we prevent that happening to us.

9MichaelHoward
See also the Milgram experiment and Stanford prison experiment.
7TropicalFruit
This 1000x. Related is replacing the naive idea that "money corrupts" with the truer "money makes you more of what you are." Most people's inherent corruption and selfishness is reigned in by a lack of power. Money allows it to come out. The nice thing about (ideal) capitalism is that only hard working, risk taking, creative people end up with power, which leads to more hard work, more risk taking, and more creativity. It's the people who acquire money through other means that end up "corrupted" by it, even though they're really just showing who they were all along.
5Scott Alexander
But we also have evidence from our past actions. For example, I have never cheated on a test or shoplifted in the past, so I assume this is true of everyone. My friends say the same thing (and I mostly believe them).

I'd like to say I've never cheated on a test. As a general principle, I prefer to avoid doing so. I've never copied answers from another person, but I have stored notes in my calculator for tests in which doing so was explicitly forbidden - we were told to memorize various formulas that we would have to use on the test, and not to store them in our calculators. Also, on one of those "fill in the bubble" standardized tests which are Really Important, I used extra time on one section to go back and finish a previous section, although we weren't supposed to.

So, have I cheated on a test? Well...

I take advantage of opportunities. You bend the rules. He's a dirty cheater. ;)

[-]Emile140

That may apply to shoplifting, but not when you're predicting your behaviour in different situations - "I would be good even if given more power".

From Why Does Power Corrupt?:

The young revolutionary's belief is honest. There will be no betraying catch in his throat, as he explains why the tribe is doomed at the hands of the old and corrupt, unless he is given power to set things right. Not even subconsciously does he think, "And then, once I obtain power, I will strangely begin to resemble that old corrupt guard, abusing my power to increase my inclusive genetic fitness."

Did you have a reason to cheat? Did your friends have a reason to cheat? (Alternatively, did they have a reason not to tell you they did? Would it have made them look especially bad compared to you?) If you're good at taking tests you'll probably never cheat, associate with people who are similarly academically gifted, and make people who aren't academically gifted embarrassed to admit their struggles. This obviously isn't a case of powerlessness though.

Imagine you are particularly bad at taking tests though. It's not obvious that cheating would be easy. I went to a particularly awful school and while I was good at taking tests, none of my friends were, and after finishing the test I would openly hand my paper to them and they'd all quickly copy down the answers. They were all fortunate to have an amoral friend and disinterested teachers. In college I knew a girl who would write notes on her thighs before going into an exam. She claimed she could get away with it because she's attractive. (She also claimed to have cheated on every exam.) To cheat on a test, you need access to answers, the ability to get away with it, etc. If these conditions aren't forthcoming, but you're not academically gifted, you might be tempted to say "I may be a C student but at least I've never cheated on a test." Should your situation change, you'd probably start peeking at the answers. (At which point you might start saying, "these sorts of tests are meaningless anyway.")

Very interesting post. Perhaps I should mention that there's a possibility to go to the other extreme; assuming you're different to everyone else. A lot of very bad pretentious teenage poetry stands as testament to this.

[-]Emile240

Very true. A typical reaction when reading advice or something about the typical flaws of people (biases, planning), is "Yeah but that doesn't apply to me". It often takes a deliberate effort to override the inside view and stop finding excuses.

Note that in both cases the mistake makes us look better:

  • "I know how others work from the experience of my own mind" sounds better than "I don't understand other people"
  • "I don't make that common mistake because I'm different from others" sounds better than "whoops I'm also likely to make that mistake"
[-][anonymous]180

Indeed, it's one of the interesting paradoxes about people. We think that everyone is the same as us (shown in examples like this), while simultaneously thinking that we're unique and special (for things like narcissism, the narrative fallacy, and even religion.)

It's actually a wonder we manage to accomplish anything at all, given the messy state of our brains...

Now that the two extremes have been discounted, I have a disturbing compulsive need to know exactly how many other people there are out there who are like me.

8abramdemski
Oh! Yes. This makes me recall the moment when I realized that I should, in fact, generalize to other minds from the example of mine. (Before reading your post, it did not occur to me that I had not always done this.) It was in grade 8, after talking with someone who reported mental states similar to mine. I am not sure exactly what I thought before this, but more or less, I felt that I had no way of knowing what it was like for other people.

Regarding differences in mental imagery: only this winter did I really understand that good musicians have vivid aural imagination, while I couldn't hear any sounds in my head, period. Immediately after this realization I started exercising. By now I can hear complete monophonic melodies, and (on good days) imagine two notes sounding at the same time. Classically trained conductors can imagine a complete orchestral sound while reading sheet music. I don't see any reason why visual imagination can't be similarly trained.

Even after reading the article, this comment completely blew my mind. I knew intellectually that some people might have eidetic imagery, but didn't emotionally believe that people's visual imagination could really feel as vivid as life.

Unlike sounds, which obviously can be imagined as exactly as when you hear them.

Does this Futurama joke work for you? Do you get songs stuck in your head? I'm expecting a "yes", but am prepared to be shocked.

At any given time, I always have some song or another playing in my head, and I can recall songs I've memorized and "play them back" at will. Usually it's just the melody, though; the harmony usually doesn't seem to get captured as easily. (I've taken piano lessons for most of my life and I'm told I'm rather talented, although I'm nowhere near as good as professional musicians.)

Sometimes, an earworm gets attached to the point where I can't tell the difference between what's in my head and what I'm hearing with my ears. This usually happens when I've been playing a video game with MIDI-like music for a long period of time. (On a side note, I must have no taste, because I find I prefer the MIDI-like sounds of the NES and SNES-era to the more elaborate music of today's video games. The FF6 soundtrack is my favorite music, ever.)

There's a lot of great music that's gotten into videogames. Anything that people can listen to for hours on end and not get sick of must have some merit.

(Anyhow, the only true measure of taste is what people like years hence. And even supposedly great musicians can be unreliable predictors.)

I think a lack of aural imagination explains a lot of mediocre musicians who are beginners, and who stay beginners, in traditional music. They are only trying to waggle their fingers in the right magical sequence to get the tune to somewhat come out. They're not hearing the tune in their head and letting it come out.

5Hayashi
No, some of the music of the NES and SNES era are the best music ever written. And I was born AFTER that era, so by the childhood argument my favourite music ought to be of the early Pentium games I played... I only heard the music of the SNES era more recently. They are actually THAT GOOD. Ditto, the thing that people still listen to Mozart and Beethoven even though they've been dead for centuries. I'd argue that music nowadays is regressing to the lowest common denominator of rhythm and losing all the melodic complexity I like. And melodic complexity is perfectly achievable using only 8-bit instruments. On my end my visual imagery is poor, I can barely remember faces, places clearly, but it does exist somewhat. HOWEVER My aural imagery is nearly peerless relative to any of the people I know in real life, I can sing songs in languages I know after two passes and in languages I don't after about 10 passes, I can isolate specific instruments from my memory of a song and play them back, not just the melody; I remember music not just as a whole, but as coordinations of multiple single instruments. The idea that aural and visual imagery must be closely linked in itself is a generalisation. Heck, for an extreme example I'd bet that the blind from birth generally don't have visual imagery and have greatly above par aural imagery, whereas the deaf from birth generally don't have aural imagery and have greatly above par visual imagery, though there will be instances where they have neither.

I'd argue that music nowadays is regressing to the lowest common denominator of rhythm and losing all the melodic complexity I like. And melodic complexity is perfectly achievable using only 8-bit instruments.

I've also read that restrictions of the systems in those days are probably why there were so many games with memorable melodies; melodic complexity was the only kind of complexity possible, so that's what we ended up with. (I agree with this theory.)

5wedrifid
How did you manage to develop this superpower?
1Delta
I think this is something that varies between people. I was very surprised to learn that my sister doesn't even listen to the lyrics of songs, whereas I do and want to learn them so I can sing along (probably very badly, but hey) and get annoyed if I come to a part where I don't know the words. Likewise if I'm fully engaged during a film I can recall almost all of it, even some time later, whereas my sister can't (or perhaps wasn't as engaged in the examples I have in mind). I'm sure experience helps too though. When I was younger used to listen to songs from anime and memorise the words despite not knowing the language. I probably wouldn't be as good at picking up lyrics if I wasn't as obsessive about knowing them and didn't listen to the same songs a lot.
2wedrifid
This point is less strong than the SNES point. Mozart and Beethoven can be (more easily) explained by simple selection. There have been a lot of pieces of music written over many centuries.... etc.

My experience in my non-academic work life, is that many programmers can't visualize verbal descriptions of subsystems, but they learn how to make convincing "I got it" noises to mollify their coworkers. It's not just programmers, it's all sorts of coworkers. I have no idea how an adult can avoid this pitfall.

My ex-girfriend's exceptional ability to draw realistic, well-proportioned humans in detailed scenes tipped me off to this phenomenon in much the same way.

I have very little ability to visualize a scene the way that must be required in order to do this. If I were attempting to draw (a pursuit I've long given up on, though I commend your attempt at overcoming the gap in your own abilities with music), I would have to draw an outline of the scene, and then come back and gradually fill in details, relying on my previous low-resolution version of the drawing for input as to how to draw the next iteration.

She was perfectly capable of starting on one end of the scene and filling it in at near full resolution. The proportion would be right in the end, requiring only minor touch-ups and modifications. She must have some very vivid image in her head.

3Jack
What were you methods for practicing? These are the sorts of practical skills that we could really experiment with and develop actual lessons and strategies for the development of certain mental abilities.

The Typical Psyche Fallacy says my methods won't necessarily work for everyone, but anyway...

The hardest part for me was the beginning, getting a toehold at any inner sound. Pick a note on the guitar - I started with D on the second string. Play it at a steady rhythm with rests, slowly fading away into nothing. (Might not be possible on the piano or other instruments.) At some moment the brain will start to "complete" the sound, even though by that point you're playing too softly to hear. Catch that feeling, expand on it. When you can "do" several different notes, try playing a simple melody and hearing it afterwards. After you're comfortable with that, try to hear a simple major scale without playing it immediately beforehand. Then work from unfamiliar sheet music without playing it - solfege-sing in your mind - by now I can do this quite easily. And so on.

2Vladimir_Nesov
I used to sing in a boys choir. At the time, I started to develop an ability to actually hear songs in my head, but I became afraid of this turning into uncontrollable hallucinations, so I suppressed the vividness of experience. I'm still not sure whether it's dangerous, as the issue never turned up since. But I urge you to research this risk before going deeper.

As a trained musician with a vivid aural imagination, I find this idea to be hilarious. Totally. Risky? Really? What could possibly be risky about practicing a skill that others possess in much greater quantities, due to the same sort of practice?

6Vladimir_Nesov
Remember, I had no data on this, and a priori starting to hear sound where it isn't really there seems like nothing normal. Even if you possess the knowledge to rule something hilarious, it doesn't necessarily invalidate the correctness of an a priori position. If I toss a coin without looking, you peak at it and see it's "heads", my suggestion that it might well be "tails" isn't wrong for my state of knowledge.
3pdf23ds
Granted, naturally.
0Tem42
It is worth noting that Musical Ear Syndrome is often framed as a condition in which 'victims' can 'suffer' from auditory hallucinations. Any intrusive mental event can occur to the point that it is negative. I have also heard some sufferers of OCD (specifically Pure O) complain of ever-present music. However, I agree that in general, more music in your head is better :-)
0[anonymous]
Yep, can concur. I avoid listening to music with lyrics for this reason. Sometimes I'm tempted, though, and give-in! edit 1: also avoid listening to music without lyrics, but to a lesser extent.
4christina
I have had that ability all my life. I do not experience any sort of auditory or visual hallucinations as a result (I can distinguish the difference between a sound or image from my mind and one from my eyes or ears). I guess it was alarming to you because it turned up suddenly and you had no prior expectation of it. Maybe for some people this is something to worry about, but as long as you can perceive the difference between external inputs and internal ones, this abiility is actually very useful.
2arundelo
When you say "actually hear", do you mean that the only way you could tell that the sounds weren't real was that you knew (for example) the radio was off? Or do you mean something else?
2MrHen
I would describe my related experiences as my imagination producing background noises. If I tried to concentrate on the background noises and bring them to the foreground they disappear and I only have the non-noise version left in my head. My hunch is that this latter state is more common amongst people who get songs stuck in their head: You think of words, you think of melodies, but you do not hear anything. Another easy way to show the distinction, I never sing along with the fake audio. It is always background and as soon as I notice that I am hearing something it goes away. The experience reminds me of deja vu to an extent. I can tell something is hiccoughing in my sensory processing but instead of complaining about it I just enjoy the song as long as I can before it goes away. Obviously, I cannot speak for Vladimir_Nesov.
2pjeby
You don't need to suppress it, you just need to include something to be able to tell the difference between it and a real sound. It doesn't even need to be something auditory, it can be imagining them coming out of a pair of imaginary speakers. Hypnotherapist Milton Erickson is said to have cured a woman of schizophrenia in the following fashion: after finding out that she couldn't tell the difference between things that actually happened and things she imagined, he hypnotized the woman's therapist and asked him how he could tell the difference between fantasy and reality. The therapist said that he saw imagined things in a little square box like a TV set, with a black border around them. So Erickson hypnotized the woman and told her to put a square black border around everything she imagined so she'd be able to tell the difference. Subsequently, she ceased to be "crazy".
-2Vladimir_Nesov
Your reply is not even anecdotal evidence. It only tells me that you find it fitting to give this particular advice. Is your example with curing hallucinations supposed to impart the idea that getting hallucinations is OK, since they can be cured or worked around anyway? That's bullshit.
7pjeby
No, it was intended to impart the idea that the primary difference between imagination and hallucination is whether you can tell the difference between the two. NLP latched on to this distinction from Erickson's example, and have since noted that skill in a wide variety of achievements (music, baseball, golf, interior design) rely on various forms of visual or auditory hallucination, and that these hallucinations are behaviorarlly indistinguishable from the hallucinations of crazy people. (Same eye movements/focal changes, same breathing/posture/ shifts, etc.) The only difference they've been able to find is that the crazy people don't know when they're hallucinating, but they can be taught to do so. IOW, distinguishing imagination from reality appears to be a learned skill, just like learning to imagine things on purpose.