[BeetleB]

> When one actively uses something, there is a natural spaced repetition of the things that matter. With the frequencies as these things are used in practice. Everything else can be looked up later.

Disagree: There's a grey area in the middle where it is costly to always look it up, but you don't do it often enough to ever be ingrained in memory. SRS is a fairly effortless way to cure it.

When I started my current job (somewhat math heavy), I didn't know enough background material. So I got put on a "side" project while I learn the main material. Unfortunately, that side project became fairly big so I didn't have too much time to study the bread and butter of that job. I would read a little from a text book every few weeks. Without SRS, there is no way that I would be able to do it. The frequency is low enough that natural reading would not preserve anything in memory, and it is one of those books that constantly refers to prior theorems/definitions.

> For programming, maths, physics, etc - "I forgot" means more or less "it is more time-efficient to google it once a few years than put effort in storing in in my memory".

You really cannot do mathematics well that way. When proving a theorem, you often will not even remember there is a theorem that could help you unless it's already in memory.

I once took a course on measure theory where it was a given that at least one question on each exam would be to prove a random theorem in the book. This was frustrating - since when should math require memorizing? And memorizing all the theorems? Sheesh!

When I was preparing for the final exam, I did attempt to memorize all the proofs. And then it hit me: There were certain proof techniques that were common to many proofs, and I had not picked up on it by merely doing the assigned problems.

This was a decade ago, when I did not use SRS (did try, but failed that time). Looking back at my experience in math courses, I realize that memory was definitely a bottleneck. Remembering certain theorems you took in a course a few semesters ago just wasn't happening beyond a certain young age (20). If I ever were to go back to math, I would definitely attempt some SRS use.

Of course, SRS alone won't cut it. You still need to solve lots of problems.

Oh, and after a decade of very heavy Emacs use, I tried using SRS to get better. And I did. A lot. So even heavy use isn't much of a guarantee that things will stick.

[moosey]

My general practice with mathematics is and Anki is to:

1) Understand the material I'm learning. 2) Put explanations of any algebraic procedures (for instance, the dot product of two vectors) as a flip card. 3) Put a single example of doing the work in a flip card.

For important proofs, I put them in Anki using Cloze deletion. I just drop in the whole proof, and knock out portions. This has been extremely effective in remembering and understanding the proofs. I also do this for geometric explanations of procedure.

This is definitely not overkill, and creates cards that you can go over really quickly. Ever since I have begun doing so, I have found that it is far easier for me to apply what I have learned, and that I can more easily understand the options that I have for finding solutions to problems, because I have all of the options available without requiring me to look over old information. It's just there.

Ever since taking Barbara Oakley's classes (Learning How to Learn and Mindshift), I have been a more productive and emotionally stable human being, and my ability to learn and understand the information that I am learning has exploded. One of the most important things I remember mentioned in that class was that memorization and understanding are actually quite tightly linked.

There are things that I have dealt with in the real world that would have been solved by math lessons that I've forgotten since I left University twenty years ago. I was never very good at studying because of anxieties and procrastination. The simple fact that I know I'm going to put information into Anki allows me to concentrate and gives me procedure no matter what I'm trying to learn, regardless of source (readings, lectures, etc.). I wish I had this ages ago.

[BeetleB]

> For important proofs, I put them in Anki using Cloze deletion. I just drop in the whole proof, and knock out portions. This has been extremely effective in remembering and understanding the proofs.

Thanks - I still haven't used it for mathematics, but this is good to know. I do have a few proofs of theorems in statistics in my flashcards, but the whole point of the cards is to spend only a few minutes a day on them - and doing a few proofs requires a paper, pen, and time. So I keep those in a separate deck and do them only when I know I have time.

My concern with mere cloze deletion is that I'll likely get the illusion of understanding without real testing (being able to rederive something is a real test). I'll likely go for a hybrid approach - full proofs in a separate deck and either proof sketches or cloze deletion in the regular deck.

> One of the most important things I remember mentioned in that class was that memorization and understanding are actually quite tightly linked.

This stood out to me when I took the course, although my memory of it is different. I don't think she said memorization, but "covering it and reproducing it in your own words" - the latter requiring understanding. But yes, she claimed that the research showed this outperforms things like mind maps, and that nothing has so far been shown to outperform this.

[IvanVergiliev]

I’ve done some cloze deletions for math and related things, but I generally feel like having almost the whole proof in the prompt gives me too many cues. It often leaves me thinking that I indeed wouldn’t be able to come with the answer with fewer hints.

What I’ve tried the last couple of attempts is to “chunk” the proof (also terminology touched on in Barbara Oakley’s course) so that I end up with a question that’s something like “what’s the high-level idea / approach in the proof for X?”. That card would likely require an understanding of some underlying concepts or “chunks”, so I add questions for these too until I get to something that’s less abstract and easier to rederive.

I’m still not 100% confident if this will work well when these particular cards get into the 6-month range or so, and they start showing up at completely unrelated times. My main concern is that if I’ve forgotten some idea from “the middle”, it would be hard to reason about cards that build up on top of that.

[moosey]

"Covering and reproducing in your own words" is a combination of recall and synthesis, both necessary for remembering. This was a different section, and it might have been the Mindshift class, where she mentioned in US schools, we focus too much on understanding and conceptualization, while in Chinese schools, it's mostly memorization. Unfortunately, the two ideas only really work optimally together. Either model produces extremely well educated on occasion, but if you use both, then anyone can not only educate themselves well, but retain it for a far longer time period. Further, understandings of subjects are compounded by the memorization process. In my own practice, I've found this to be true, but that's anecdotal. Some nation is going to get their act together and try this on a larger scale, and I can't wait to see the output.

[stared]

Well, I finished a mathematical physics PhD, without a hint of SRS.

During my undergraduate time I knew people memorizing instead of trying to understand theorems (especially ones with background in chemistry). Often they got good exam results... and almost never it helped to build a bigger picture, or do research in mathematics.

That said, I have ADHD and any small-dose-but-regular learning (typical for classes!) was painful to me (and not to effective).

YMMV.

[BeetleB]

> During my undergraduate time I knew people memorizing instead of trying to understand theorems (especially ones with background in chemistry).

As I pointed out in another comment, this is a false dichotomy. You can do both. I contend that one who attempts to understand and memorize will know the material better than one who doesn't. The thrust of my argument isn't that it is necessary. It's that you will gain from it. Of course, if you make that your only tool in the toolbox, you will suffer.

And I never claimed that not memorizing will prevent degrees. I'm sure while in grad school you came across plenty of less capable people than you who nevertheless still got a PhD ;-)

[wkey]

I would be curious as to any techniques you used to overcome this painful regular learning. I find certain 'plain' tasks (for lack of a better word) excruciating.

[stared]

Read "Driven to distraction" https://www.amazon.com/Driven-Distraction-Revised-Recognizin..., you may resonate with some of these points (even if you don't experience a full-blown ADHD).

In my case, well, if something really needs to be regular, the only way to go is external pressure (external deadlines, people meeting at a given time with the goal to learn) and bringing some intensity (instead of 1h learning, a day focused on that).

[lanstin]

Hmmmm. Maths is one area where I have felt you hurt yourself by remembering things (except maybe definitions but then usually people state the current in scope definition in the preface or something). You can derive most things about as fast and more usefully than you can remember it. Except maybe a couple identities per area. But these will tend to be beautiful enough you will run over the derivation just for pleasure from time to time.

With enacs I find if it is not in my muscle memory it doesn’t matter if I consciously know about a feature. I can think “there must be some way of doing this” and then googling it and finding it as fast as I can stop my work and recall that in 2005 I used to have some good method of dooming this obscure use case of editing/process management.

Especially now with everything changing so quickly I find paying attention to the deep constraints and reserving the possible solutions from those conditions is more effective than trying to memorize a bunch of library or platform specific capabilities.

[BeetleB]

> You can derive most things about as fast and more usefully than you can remember it. Except maybe a couple identities per area. But these will tend to be beautiful enough you will run over the derivation just for pleasure from time to time.

To derive things, you need to have memorized a basic set of theorems. As you go deeper and deeper, the "stack" gets bigger. If you only memorize the very basics, there's a good chance you will not be able to derive the deeper stuff whenever you need it.

If you are in second semester measure theory and you haven't ingrained a lot of the first semester of real analysis in your head, you likely will do poorly. Quick: When is a closed set not compact? If you do analysis a lot, you can easily answer this question. However, if you do it only occasionally, not knowing this will limit you (or even worse, and common, believing that all closed sets are compact).

I used to be in the camp of "Memorization sucks - just solve enough problems and it will stick". Its only recently that I'm realizing I was wrong. Everyone will have things stick if they do enough problems, but also everyone will have a different capacity for how much sticks. You'll hit your peak eventually by just solving problems, and a better memory will take you further beyond that small peak. Once you realize how effective SRS can be, you don't want to be limited by a poor memory.

> With enacs I find if it is not in my muscle memory it doesn’t matter if I consciously know about a feature. I can think “there must be some way of doing this” and then googling it and finding it as fast as I can stop my work

Often when reading the org mode manual I'll come across something that makes me say "Oh wow, I wish I knew this keybinding" and then would promise to remember it or look it up when needed. It's depressing how often I've said that about the same keybinding. Now that I use SRS, this phenomenon still occurs, but at less than half the frequency it used to.

Although to be frank, I now use hydra on Emacs often, so it's not as common for me to memorize keybindings.

> Especially now with everything changing so quickly I find paying attention to the deep constraints and reserving the possible solutions from those conditions is more effective than trying to memorize a bunch of library or platform specific capabilities.

Emacs is timeless :-) I will be using it for probably as long as I can use a computer.

But yes, I would be selective on what to put in SRS. Reviewing takes very little time, but creating new entries is time consuming. It needs to be worth it in the long run.