Manjari Narayan | @Neurostats's Avatar

Manjari Narayan | @Neurostats

@neurostats.org

AI in Bio & Health & Therapeutic Development Bio: https://linktr.ee/mnarayan Substack: https://blog.neurostats.org Peek into my brain: notes.manjarinarayan.org Previously @dynotx @StanfordMed PhD@RiceU_ECE | BS@ECEILLINOIS ๐Ÿงช๐Ÿงฎโš•๏ธ๐Ÿงฌ๐Ÿง ๐Ÿ–ฅ๐Ÿค–๐Ÿ“ˆโœ๏ธ๐Ÿฉบ๐Ÿ‘ฉโ€๐Ÿ“ˆ๐Ÿ“‰

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Latest posts by Manjari Narayan | @Neurostats @neurostats.org

I think the problem here is that most people who do epidemiological research - including many who might call themselves 'epidemiologists' - have not actually had any epidemiology training. I wish it was a protected title. With an exam that would require proving you understand residual confounding!

17.07.2025 14:05 ๐Ÿ‘ 12 ๐Ÿ” 1 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0

Otherwise, I'm more considered about pre-validation issues โ€”ย correcting for chronological age without nested cross-validation in biomarker prediction models.

The nonlinear thing becomes an issue if you want to make a claim that residuals are independent of age.

17.07.2025 17:44 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

For example, current evidence is that LLMs rely too much on interpolation rather than discovering underlying invariant causal abstractions.

26.06.2025 17:36 ๐Ÿ‘ 9 ๐Ÿ” 1 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 1

๐Ÿ“Œ

27.06.2025 21:15 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Same goes for structure determines function concepts

27.06.2025 20:47 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I think Cox is earnest. It is scary to listen to him because he is right that the AI presentation of "facts" is largely based on what is popular, but you can also steer it to selectively give you evidence that confirms your own worldview.

27.06.2025 15:18 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Preview
Inside a plan to use AI to amplify doubts about the dangers of pollutants Risk analyst Tony Coxโ€™s work has been backed by the chemical lobby, and some health experts are alarmed

This appears to be a very problematic weaponization of casual reasoning that feels 'rigorous' because it involves a selective presentation of evidence. Some very excellent researchers have looked into the problems from air pollution.

#CausalSky #MetaSky

www.theguardian.com/technology/n...

27.06.2025 15:15 ๐Ÿ‘ 2 ๐Ÿ” 1 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

๐Ÿ“Œ

25.06.2025 00:14 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

What year was this picture taken in?

22.06.2025 21:26 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Exactly

> The people who care about a topic enough to research it will often have ideological motivations. The ideological influence is there. That doesnโ€™t mean itโ€™s bad science.

22.06.2025 20:48 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Every few years there is a new article like this, but not much will change unless scientists stop relying on GraphPad Prism that doesn't offer any of this and have something they can use more easily.

LLM powered workflows might change this going forward.

22.06.2025 17:51 ๐Ÿ‘ 6 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

๐Ÿ“Œ

22.06.2025 16:47 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

The grass is not greener, I'm afraid.

21.06.2025 20:15 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

It's a niche for sure. But it exists and it's underutilized and could be further developed

21.06.2025 19:30 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

๐Ÿ“Œ

21.06.2025 13:25 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Unless you are using inferential clustering methods that are designed to severely test any hypotheses against the baseline that "how often would you find clusters if the data was generated by these high dimensional null patterns or if data were corrupted by structured measurement error"

21.06.2025 13:24 ๐Ÿ‘ 7 ๐Ÿ” 2 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Preview
ML2ClinicalTrials/Trialbench at main ยท ML2Health/ML2ClinicalTrials Contribute to ML2Health/ML2ClinicalTrials development by creating an account on GitHub.

Can you demonstrate the extent and degree of different kinds of sequential selection biases from a #CausalSky #StatSky #MedSky perspective in public clinical trial datasets?

DM me if you are interested.

For instance in TrialBench?
github.com/ML2Health/ML...

21.06.2025 13:20 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Preview
Canโ€™t take it with you I am in hospice care and reflecting a lot on what a good life is.

She wrote this in Mayโ€ฆ

20.06.2025 21:09 ๐Ÿ‘ 104 ๐Ÿ” 17 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 1

the Mesoscopic Integrated Neuroimaging Data (MIND) platform will soon be opening also for outside researchers leveraging our new 15.2 T ๐Ÿ MRI, SHIELD clearing and fully upgraded lightsheet microscope plus computational resources developed by @neuroak.bsky.social to handle large datasets.

20.06.2025 15:01 ๐Ÿ‘ 15 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 2

๐Ÿ“Œ

20.06.2025 13:30 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

๐Ÿ“Œ

20.06.2025 13:16 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I also think most of the authors were not solid neuroimaging researchers. It was like a fun project. Not particularly good science.

19.06.2025 22:31 ๐Ÿ‘ 6 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Neurobullshit is alive and well in education research. Reminds me of the good old days of @neuroskeptic.bsky.social on this 10+ years ago

19.06.2025 21:21 ๐Ÿ‘ 29 ๐Ÿ” 4 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0
Preview
Manjari Narayan on Substack The part Box said that is often left out. โ€œThe practical question is how wrong do (models) have to be to not be useful.โ€

substack.com/@manjarinara...

18.06.2025 14:23 ๐Ÿ‘ 11 ๐Ÿ” 2 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

๐Ÿ“Œ

18.06.2025 14:20 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Also, longitudinal studies don't fix causality problems. Fortunately, they help you discover entirely new kinds of confounding.

18.06.2025 14:17 ๐Ÿ‘ 11 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

๐Ÿ“Œ

18.06.2025 14:15 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

If you use a model dialogically, itโ€™s effectively guiding you through the free-writing/revision cycle composition teachers recommend.

I get why this mode of use isnโ€™t very visible. All the rhetoric around AI has been that itโ€™s โ€œgenerativeโ€ and does the work for you. Things like the โ€œDear Sydneyโ€ +

18.06.2025 10:52 ๐Ÿ‘ 45 ๐Ÿ” 3 ๐Ÿ’ฌ 4 ๐Ÿ“Œ 1

I feel vindicated

18.06.2025 11:58 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

cc:
@jackiesullivan.bsky.social @kordinglab.bsky.social nglab.bsky.social and Paul Cisek.

17.06.2025 21:07 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0