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R2 = 0.11
Edit: tried with R<sup>2</sup> but it didn’t work. :(
Edit 02: thanks to @jaennaet for educating me on proper syntax.
I love that they put an error margin, which doesn’t include 90 % of all the datapoints.
That’s how a standard error with normal-ish data works. The more data points for the estimation of a conditional mean you have, the fewer of the data point will be within it. For a normal distribution, the SE=SD/√N . Heck, you can even just calculate which proportion of the distribution you can expect to be within the 95% CI as a function of sample size. (Its a bit more complicated because of how probabilities factor into this, but for a large enough N it’s fine)
For N=9, you’d expect 26% of data points within the 95% CI of the mean For N=16, 19% For 25, 16% For 100, 8% For 400, 4% Etc
Out of curiosity: What issue did you take with the error margin not including most data points?
Oops, should have multiplied those intervals with 1.96, ao here again:
9 - 49%
16 - 38%
25 - 30%
100 -16%
400 - 8%
guess the correlation, looks about like a solid 0.1. Whoever put that regression line in there is crazy, the confidence interval is insulting.
Why does that fucking Thing require my Google account?
No idea, sorry.
How do you think a case of “this explains some of the differences in the population, but not a lot” should look?
And that looks potentially fine for an error bar. For a mean estimate, SE=SD/√N , so depending on what error band they used this looks quite plausible.
Also, the R^2 is even in the picture: .11
Take a look at these examples of regression. See how any one of the conclusions is absurd? Mind you the data in that example is far less random!
I recommend finding a different statistics teacher, preferably one who isn’t a comic and one who knows what the difference between a standard deviation, a standard error, and a 95% interval is. Those should not be too hard to find, it’s relatively basic stuff, but many people actually kinda struggle with the concepts (made harder by various factors, don’t get me started on the misuse of bar charts).
I post the picture because it gets the point across, not because that is “my teacher”. The point is that you can choose smart any random regression function and they all fit just as “good”.
I am 29, and so far I didn’t really see any mental decline, sometimes even the reverse - I become better at learning certain stuff. Although I am also more aware that I will never be on the level some very talented people are, but it’s fine.
Played a reflex-based video game against a teenager lately?
I feel like reflexes are different than learning. Motor control definitely gets worse over time.
Played a fiddle vs the Devil?
Im in my thirties and still average reflex speeds around 150-175ms ¯\_(ツ)_/¯
I don’t really play competitive video games, because I have always seen them as waste of time, and I easily get angry,but recently I nearly did get all retroachievements for NES Terris (just one remaining), so I guess my reflexes are not horrible yet.
A lot of things are easier to learn when you have a base foundation.
Also, a lot of skills have interrelated mental pathways, so once you have enough exp with one, learning the other means, you are actually plasticising your brain, less than what you would have, had you learnt the other skill without knowing the first.
I feel like the first time you notice that you have lost some mental capacity is a middle age right of passage.
Absolute scattershot of datapoints
Nooo he’s so cute, I can interpolate him
Bestie, stop
https://doi.org/10.1111/bjc.12505 the paper
Nuh-uh.
Lol
Goddamnit Taleb.
What is this, a black swan event you could not have predicted as being within the realm of possibility, and thus have no idea how to react?
God Damnit, Taleb.
Taleb’s mind just isn’t antifragile enough. Or maybe too antifragile. Idk I didn’t read his book
As a subject I cam confirm. No
Currently 29. Noticed mental decline after concussions in my youth and a few years of heavy drinking. I don’t fall on my head as much and I don’t really drink anymore, but I’m not sure how much of what I’ve lost I’m going to get back.
I’ve been there and all I can say is that the brain is a miraculous organ and can heal really well from a lot of trauma. You just have to stop damaging it, learn how to work with your brain rather than having your brain work for you, and exercise it. Challenge yourself to learn an easy skill, then another, then another.
What do you mean stop damaging it? What makes it sound like I’m not working with my brain? What makes it sound like I’m not exercising my brain?
No I’m not going to stop doing sports. I’m doing a lot to work with my brain, and I’m always learning something new.
I’m learning sumi-e painting to go with my calligraphy, I’m taking the time to get back into programming. This is my second year mountain biking and I’ve gotten pretty good at it over the summer. I journal every day and reflect, I’ve been making a lot of progress being less critical of myself. In doing all those things I’ve felt my social skills slip, so now I’m putting in the effort to be around people more and be vulnerable around them.
And yet I can feel places where my brain isn’t as strong as it used to be. I’m accepting of that and trying to love myself in spite of my shortcomings. I don’t need to optimize for everything, I can just focus on what’s important to me.
But we know for a fact that plasticity does drop with age, that’s why it’s so difficult to learn foreign language after childhood.
Neuroplasticity does drop with age, but the drop is smaller than it was previously assumed to be, especially outside of early childhood (you may note that eg. this graph starts at 20 years old)
As far as I can tell. They have just drawn a line on a random distribution.
If it’s a random distribution, then we can’t say that neuroplasticity drops, either.
It helps a lot that they’re completely immersed in the language, by people who want to help them learn, and they desperately need to tell us things with no alternative.
