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Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by haberman on Wednesday May 04, 2016 @06:44PM (#11632554)
> What shocked me was how many of these kids created internal narratives that they somehow caused the storm, or the storm was manifested as a personal lesson for them.

Exactly. I would argue that internal narratives like this are inherently anti-statistical. They attempt to give greater meaning to something than the direct observations support.

What experiment would convince you that statistics is not "the ultimate language of the brain?"

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by notahacker on Wednesday May 04, 2016 @08:19PM (#11633043)
I'm not sure I'm convinced that statistics is the language of the brain, but I am convinced that statistical inference is one of the main reasons why individuals (and later, populations) come to believe in some highly irrational superstitions - the ones where there's no reason to assume causality at all save for correlation of rare events (particularly if we're assuming imperfect use of statistics influenced by our cognitive biases rather than "the scientific method is the language of the brain)

"This cattle-killing sounds crazy but since she was right about some other low probability events the probability of her being an actual prophet is pretty high, given the existence of prophets is not inherently improbable" and "my odds of survival are better if I follow this stupid recommendation than if I'm lynched by my fellow countrymen for ignoring it" are both statistically valid conclusions in favour of following some ridiculous food-source-decimating millenialist prophecy in certain circumstances.

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by haberman on Wednesday May 04, 2016 @11:41PM (#11633886)
> "This cattle-killing sounds crazy but since she was right about some other low probability events..."

Ok you have a story. I can tell a different story: "My tendency towards religious/supernatural belief that has helped me and my ancestors form moral codes and act tribally has in this case caused me to embrace a belief that will lead to the ruin of me and my people. These religious/supernatural beliefs are inherently anti-statistical and lead to lots of incorrect ideas like witchcraft and rainmaking, but these systems of belief are selected by evolution because they overall increase our chances of survival."

Now we have two stories, two narratives. Why do you believe yours over mine? And how can we objectively decide which story reflects the truth about the human brain?

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by nl on Thursday May 05, 2016 @02:35AM (#11634375)
These religious/supernatural beliefs are inherently anti-statistical

No they aren't. They follow the Laplace–Bayes estimator for calculating the rule of succession[1].

I needed rain -> I did a rain dance -> it rained

I needed rain -> I did a rain dance -> it didn't rain -> I must have done something wrong

Both are perfectly valid rules of succession - not forgetting that most religious beliefs make it pretty easy to find something you did wrong. One might suspect these rules could have been caused by spurious statistical relationships.

[1] https://en.wikipedia.org/wiki/Rule_of_succession

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by haberman on Thursday May 05, 2016 @02:49AM (#11634421)
> I needed rain -> I did a rain dance -> it rained [...] I needed rain -> I did a rain dance -> it didn't rain -> I must have done something wrong

This is a textbook example of a non-falsifiable experiment. I'm not sure why you would argue that you can draw meaningful statistical inferences from such an experiment.

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by nl on Thursday May 05, 2016 @03:13AM (#11634481)
I'm not arguing this is falsifiable, or an experiment - I'm arguing that it could be statistically interfered.

"Statistically valid" != Correct (if your input assumptions are incorrect).

See up thread for ways to build falsifiable experiments.

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by haberman on Thursday May 05, 2016 @03:29AM (#11634525)
If your argument is that the human mind functions primarily in terms of valid statistical inferences, it doesn't support your case if it processes its input in ways that are inherently flawed and biased.
Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by nl on Thursday May 05, 2016 @05:29AM (#11634801)
What do you mean by "valid"?

If you mean "mathematically correct" then yes that is my premise.

If you mean "correct in reality" then no.

If you have a prior belief "god created humans" with a 99% confidence, it will take a lot of evidence to override that - especially since the evidence will be a long way down a causality chain (as any online argument about evolution will show). Additionally, the confidence in that belief will be erroneously increased by lots of things you see in nature (eg - humans cannot create other life forms, therefore it must have been done by something supernatural).

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by msandford on Thursday May 05, 2016 @08:19AM (#11635397)
This thread could be summed up as "my priors tell me that if people were Actually Doing This (tm) it would look like X and it doesn't look like X, thus they aren't!" and then other people saying "uh, if you estimate the priors wrong that doesn't mean you aren't doing bayesian, it just means you estimated the priors wrong and got the wrong answer"
Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by haberman on Thursday May 05, 2016 @11:45AM (#11637103)
Ha. In my opinion, you and others are treating the brain doing statistics like religious people treat the existence of God. Absolutely any evidence can be interpreted as support for the hypothesis if you just tell the right story about it.

I'm not even saying the hypothesis is necessarily false. However I will never trust the results of people who become so attached to an idea that they focus entirely on confirming it rather than rigorously testing whether it actually reflects reality.

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by msandford on Thursday May 05, 2016 @06:08PM (#11640024)
The whole point of the experiment is "how does this machinery operate?" not "does this machinery produce the same answers as I would expect?" There's a huge difference. Just because you reason through things one way and get one set of answers as a result doesn't mean that's how everyone should operate. Different priors can (and probably should) yield different results.

Different priors probably mean entirely different lines of reasoning, so you can't even say "well they should have thought about it the way I do" because it's not like the human brain is a single 10x10 neural net with no feedback, it's probably 1Mx1M and it is recurrent; the output from one time step feeds into the input at the next one.

You could get very, very different output for the same input from two neural nets that have been trained on different data. But that doesn't somehow make them not both neural nets; the meta-structure is the same even though all the weights from node to node are different.

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by haberman on Thursday May 05, 2016 @08:38PM (#11640845)
> The whole point of the experiment is "how does this machinery operate?"

Yes, exactly!

If you say "the machinery operates in way X" (where X="Bayesian statistics"), you have to actually prove that. You can't just assert it and say that people who disagree with you have bad priors.

I have no doubt that you can construct a hypothetical Bayesian decision-making process that could have yielded any possible decision that any human has ever made. Just like any religious person can take any story that has ever happened and construct a story about why it is compatible with the existence of God.

But unless you have a falsifiable experiment to prove that the brain actually operates this way, your explanation is an unverifiable just-so story. And in this case I don't find it at all convincing.

Don't get me wrong, I understand your theoretical argument. I just think you are taking an unjustified (in my perspective) leap of faith to presume that your story reflects reality.

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by nl on Thursday May 05, 2016 @09:00AM (#11635655)
Yes!! Thanks for the succinct summary!

I'm a bit frustrated that the original comment is the top voted comment, when it is at least more wrong than right.

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by notahacker on Thursday May 05, 2016 @06:07AM (#11634910)
I don't think we can "objectively decide which story reflects the truth about the human brain", particularly not if focusing on episodes >150 years ago where historians don't even widely agree on exactly what happened, and particularly not for any theory that "statistics is the language of the human brain" that is any more nuanced than the trivially-falsified "human thought processes invariably follow the hypothetico-deductive method and are not subject to confirmation bias, attaching significance to spurious correlations or poor selection of Bayesian priors"

But if this was a problem I was particularly motivated to study, the most satisfactory method of reaching a conclusion would be to use statistical analysis to draw conclusions about which hypotheses human thought patterns appeared to be most compatible with (from my experiments and meta-analysis of others'). I don't claim to know whether this is a refinement of my innate human tendency to be impressed by statistical support for a proposition or an unusual level of abstraction I've learned to reason at after spending too much time in an undergrad classroom.

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by powera on Thursday May 05, 2016 @01:42AM (#11634210)
So you're saying that since some people are religious, brains can't operate on statistics?
Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by haberman on Thursday May 05, 2016 @02:17AM (#11634303)
I think religious belief makes it less likely that all human belief-forming and decision-making are based on statistically sound principles, yes.

But the actual point I was making in the message you replied to is much weaker than this. I was arguing that just because we can spin a narrative that says a decision-making process was based on a statistical process doesn't mean that our narrative is true. Just because you can tell a story doesn't mean the story reflects reality. We need some objective way of determining which of several competing narratives is actually true.

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by duaneb on Wednesday May 04, 2016 @07:52PM (#11632918)
> They attempt to give greater meaning to something than the direct observations support.

Why is this anti-statistical? Nobody said the statistical input had to be empirical.

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by Retric on Wednesday May 04, 2016 @08:29PM (#11633088)
If you set your internal P value at say .01 that seems great. Except your conducting lot's of experiments constantly. https://xkcd.com/882/ And when you do that you regularly show correlation when none exists.

Considering how many things used to be deadly, I can see people living with fairly low P values because false positives only need to be less deadly than false negatives for things to work out.

IMO, this also explains why people are risk averse. Generally, survival is more about avoid a few low probability bad events than having a long string of extra special awesome days.

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by nl on Thursday May 05, 2016 @02:26AM (#11634342)
They attempt to give greater meaning to something than the direct observations support.

I'd argue that an attempt to find a cause for something that is basically random good evidence that the brain is doing a statistical reasoning.

In this case it is pretty much a classical overfitting mistake: the brain thinks that it knows all the data, and everything that happens must be caused by something it knows.

Statistical processes find spurious relationships all the time.

Up-thread I answered how to perform experiments to falsify this.

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by steego on Thursday May 05, 2016 @09:29AM (#11635872)
> I would argue that internal narratives like this are inherently anti-statistical.

They're not. Those narratives are based on what they experienced. In this case, what they experienced are stories in the form of movies, TV, video games, anecdotes from peers, and Bible stories.

Now they didn't really experience them, but I'd posit the mechanisms in their mind really don't know the difference between what's real and what isn't. It doesn't matter if stories are real, all the matters is that they are the focal point of attention.

Think about it. The brain can very much be statistical, but the quality of the statistics is only as good as the data a brain is fed.

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by drumdance on Wednesday May 04, 2016 @08:41PM (#11633136)
They attempt to give greater meaning to something than the direct observations support.

This is the disease of our time, and all times. Humans are narcissistic. We like to think that whatever we experience is extra-special.

Before he died, the evangelist Jerry Falwell used to say he believed the Antichrist was alive and walking the earth. He believed the second coming was imminent, as did many of his followers.

Think about that for a second. It's been ~2000 years since the supposed resurrection, but now is the time God will pick? Why not any one of the other 100 generations?

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by steego on Wednesday May 04, 2016 @07:42PM (#11632870)
I'm not necessarily convinced statistics is the ultimate language of the brain. Like you, I imagine there are a number of legacy systems in the brain that coordinate in interesting ad-hoc ways.

What do you think I should read?

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by Normal_gaussian on Wednesday May 04, 2016 @07:53PM (#11632926)
> Like you, I imagine there are a number of legacy systems in the brain that coordinate in interesting ad-hoc ways.

I'm sorry if I have missed something obvious, but where does haberman claim such a belief? As far as I can see they are just questioning the application of the scientific method and the strength of conclusions that can be drawn from the results.

Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by steego on Wednesday May 04, 2016 @09:35PM (#11633346)
You didn't miss anything, I misspoke. I didn't mean to imply he held that that specific belief.
Re:Our Brain Uses Statistics to Calculate Confidence, Make D... by haberman on Wednesday May 04, 2016 @08:16PM (#11633019)
I don't have any reading suggestions, sorry. Psychology has a lot of interesting and useful localized results (like the list of cognitive biases I linked to before), but I don't believe any rigorous unified theory of cognition exists. At least I've never come across one.