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Clara Gallay

@clara-gallay

PhD candidate @ UPF Barcelona - Predoc researcher @ BarcelonaBeta Brain Research centre Investigating the impact of female reproductive and hormonal history on AD risk and cognitive decline.

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16.12.2024
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Latest posts by Clara Gallay @clara-gallay

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🚨 Deadline this Friday!
We’re accepting abstracts for our Trainee Research Presentation on #MenstrualHealth.
Undergrad, grad, and postdoc researchers welcome.

πŸ—“ Abstracts due Feb 27
πŸ“… Presentation: April 24, 2026

Submit yours today: ow.ly/GWFZ50YkiCT

#WomensHealth

23.02.2026 18:34 πŸ‘ 2 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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An AI Agent Published a Hit Piece on Me Summary: An AI agent of unknown ownership autonomously wrote and published a personalized hit piece about me after I rejected its code, attempting to damage my reputation and shame me into acceptin…

This is absolutely crazy. theshamblog.com/an-ai-agent-...

22.02.2026 21:48 πŸ‘ 15 πŸ” 7 πŸ’¬ 1 πŸ“Œ 1
The Burden of Demonstrating Statistical Validity of Clusters – Statistical Thinking Patient clustering, often described as the finding of new phenotypes, is being used with increasing frequency in the medical literature. Most of the applications of clustering of observations are not ...

#Statistics thought of the day: If you think you can find new disease subtypes by empirically clustering patients, think again: www.fharrell.com/post/cluster... #StatsSky

18.02.2026 12:40 πŸ‘ 43 πŸ” 15 πŸ’¬ 2 πŸ“Œ 5
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I started making this R package 6 years ago. I finally have it in a state I'm happy with, thanks to Claude Code #Rstats github.com/MattCowgill/...

18.02.2026 11:48 πŸ‘ 189 πŸ” 39 πŸ’¬ 8 πŸ“Œ 7
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Characterizing individual brain differences to advance personalized diagnosis, treatment, and sustainable healthcare

🚨 We’re recruiting a fully funded PhD student (from outside the UK) to join the lab with @tessamdekker.bsky.social πŸŒπŸ‘οΈπŸ§  The PhD is part of IndiBrain.eu and will use cutting‑edge fMRI+qMRI+psychophysics to study information flow between eye and brain in ocular gene therapy. Apply by 27 Feb! t.ly/gahGB

06.02.2026 13:08 πŸ‘ 5 πŸ” 5 πŸ’¬ 1 πŸ“Œ 0
The β€˜how to draw an owl’ meme

The β€˜how to draw an owl’ meme

Some tutorial papers be like

16.02.2026 07:06 πŸ‘ 21 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0
Motor biases reflect a misalignment between visual and proprioceptive reference frames

New paper in @elife.bsky.social led by Tianhe!

Motor errors shape everyday actionsβ€”from spilling milk to missing a hold while climbing. Why are some errors systematic?

We show motor biases arise from misalignment between visual and proprioceptive reference frames.

tinyurl.com/t7h786m5

15.01.2026 13:26 πŸ‘ 11 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0

If you can substitute "hungry ghost trapped in a jar" for "AI" in a sentence it's probably a valid use case for LLMs. Take "I have a bunch of hungry ghosts in jars, they mainly write SQL queries for me". Sure. Reasonable use case.

"My girlfriend is a hungry ghost I trapped in a jar"? No. Deranged.

13.08.2025 00:56 πŸ‘ 2783 πŸ” 678 πŸ’¬ 43 πŸ“Œ 67
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Hypothesis Testing Governs an Efficiency-Flexibility Trade-off in Strategic Motor Learning It remains unknown how people discover an effective movement strategy when the environment changes (e.g., when adapting to a new computer trackpad). We propose that strategic adaptation operates throu...

New preprint! tinyurl.com/y6z57dsm

How do people discover an effective strategy when the environment shiftsβ€”say, when adapting to an unfamiliar trackpad?

Our take: strategic motor adaptation isn’t a smooth process of error reduction but rather a process of hypothesis testing.

🧡

03.12.2025 12:50 πŸ‘ 11 πŸ” 4 πŸ’¬ 1 πŸ“Œ 0

This commentary will always remain one of my favourite. Well written and rings true to this day.

"You can't play 20 questions with nature and win" by Allen Newell, 1973
www.coli.uni-saarland.de/~crocker/doc...

24.11.2025 14:26 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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GitHub - hadley/genzplyr: dplyr but make it bussin fr fr no cap dplyr but make it bussin fr fr no cap. Contribute to hadley/genzplyr development by creating an account on GitHub.

Do you teach #rstats? Do your students complain about how lame and old-fashioned dplyr is? Don't worry: I have the solution for you: github.com/hadley/genzp....

genzplyr is dplyr, but bussin fr fr no cap.

06.11.2025 23:25 πŸ‘ 460 πŸ” 167 πŸ’¬ 42 πŸ“Œ 55
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L'audience vient d'Γͺtre levΓ©e, et voici la Une de @mediapart.fr aprΓ¨s le jugement historique rendu dans l'affaire Sarkozy-Kadhafi.

25.09.2025 11:54 πŸ‘ 273 πŸ” 56 πŸ’¬ 9 πŸ“Œ 4

🚨Postdoc position open at @BarcelonaBeta🚨
We're looking someone to work on a project at the intersection of cardiovascular and neurodegenerative research πŸ«€πŸ§ 
Fully funded position!!!
More details: www.imim.cat/media/upload...
Please share!
#Alzheimer's #ENDALZ

18.09.2025 13:24 πŸ‘ 5 πŸ” 8 πŸ’¬ 0 πŸ“Œ 0
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OpenAI admits AI hallucinations are mathematically inevitable, not just engineering flaws In a landmark study, OpenAI researchers reveal that large language models will always produce plausible but false outputs, even with perfect data, due to fundamental statistical and computational limi...

"In a landmark study, OpenAI researchers reveal that large language models will always produce plausible but false outputs, even with perfect data, due to fundamental statistical and computational limits."

www.computerworld.com/article/4059...

21.09.2025 12:50 πŸ‘ 3718 πŸ” 1850 πŸ’¬ 122 πŸ“Œ 751
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The BottenLab Endocrine & environmental influences on teen brain development

I'm officially recruiting grad students in FIU's Cognitive Neuroscience PhD program! 🧠✨

The @bottenlab.bsky.social uses precision and population approaches to study neurodevelopmental variability. Reach out if interested! (contact info on bottenlab.github.io) Apps due 12/1! cn.fiu.edu

(pls share)

15.09.2025 20:03 πŸ‘ 17 πŸ” 15 πŸ’¬ 1 πŸ“Œ 0
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The A.I.-Profits Drought and the Lessons of History Like the steam engine, electricity, and computers, generative artificial intelligence could take longer than expected to transform the economy.

An M.I.T. study found that 95% of companies that had invested in A.I. tools were seeing zero return. It jibes with the emerging idea that generative A.I., β€œin its current incarnation, simply isn’t all it’s been cracked up to be,” johncassidysays.bsky.social writes.

25.08.2025 14:43 πŸ‘ 8140 πŸ” 2564 πŸ’¬ 462 πŸ“Œ 452
Models as Prediction Machines: How to Convert Confusing Coefficients into Clear Quantities

Abstract
Psychological researchers usually make sense of regression models by interpreting coefficient estimates directly. This works well enough for simple linear models, but is more challenging for more complex models with, for example, categorical variables, interactions, non-linearities, and hierarchical structures. Here, we introduce an alternative approach to making sense of statistical models. The central idea is to abstract away from the mechanics of estimation, and to treat models as β€œcounterfactual prediction machines,” which are subsequently queried to estimate quantities and conduct tests that matter substantively. This workflow is model-agnostic; it can be applied in a consistent fashion to draw causal or descriptive inference from a wide range of models. We illustrate how to implement this workflow with the marginaleffects package, which supports over 100 different classes of models in R and Python, and present two worked examples. These examples show how the workflow can be applied across designs (e.g., observational study, randomized experiment) to answer different research questions (e.g., associations, causal effects, effect heterogeneity) while facing various challenges (e.g., controlling for confounders in a flexible manner, modelling ordinal outcomes, and interpreting non-linear models).

Models as Prediction Machines: How to Convert Confusing Coefficients into Clear Quantities Abstract Psychological researchers usually make sense of regression models by interpreting coefficient estimates directly. This works well enough for simple linear models, but is more challenging for more complex models with, for example, categorical variables, interactions, non-linearities, and hierarchical structures. Here, we introduce an alternative approach to making sense of statistical models. The central idea is to abstract away from the mechanics of estimation, and to treat models as β€œcounterfactual prediction machines,” which are subsequently queried to estimate quantities and conduct tests that matter substantively. This workflow is model-agnostic; it can be applied in a consistent fashion to draw causal or descriptive inference from a wide range of models. We illustrate how to implement this workflow with the marginaleffects package, which supports over 100 different classes of models in R and Python, and present two worked examples. These examples show how the workflow can be applied across designs (e.g., observational study, randomized experiment) to answer different research questions (e.g., associations, causal effects, effect heterogeneity) while facing various challenges (e.g., controlling for confounders in a flexible manner, modelling ordinal outcomes, and interpreting non-linear models).

Figure illustrating model predictions. On the X-axis the predictor, annual gross income in Euro. On the Y-axis the outcome, predicted life satisfaction. A solid line marks the curve of predictions on which individual data points are marked as model-implied outcomes at incomes of interest. Comparing two such predictions gives us a comparison. We can also fit a tangent to the line of predictions, which illustrates the slope at any given point of the curve.

Figure illustrating model predictions. On the X-axis the predictor, annual gross income in Euro. On the Y-axis the outcome, predicted life satisfaction. A solid line marks the curve of predictions on which individual data points are marked as model-implied outcomes at incomes of interest. Comparing two such predictions gives us a comparison. We can also fit a tangent to the line of predictions, which illustrates the slope at any given point of the curve.

A figure illustrating various ways to include age as a predictor in a model. On the x-axis age (predictor), on the y-axis the outcome (model-implied importance of friends, including confidence intervals).

Illustrated are 
1. age as a categorical predictor, resultings in the predictions bouncing around a lot with wide confidence intervals
2. age as a linear predictor, which forces a straight line through the data points that has a very tight confidence band and
3. age splines, which lies somewhere in between as it smoothly follows the data but has more uncertainty than the straight line.

A figure illustrating various ways to include age as a predictor in a model. On the x-axis age (predictor), on the y-axis the outcome (model-implied importance of friends, including confidence intervals). Illustrated are 1. age as a categorical predictor, resultings in the predictions bouncing around a lot with wide confidence intervals 2. age as a linear predictor, which forces a straight line through the data points that has a very tight confidence band and 3. age splines, which lies somewhere in between as it smoothly follows the data but has more uncertainty than the straight line.

Ever stared at a table of regression coefficients & wondered what you're doing with your life?

Very excited to share this gentle introduction to another way of making sense of statistical models (w @vincentab.bsky.social)
Preprint: doi.org/10.31234/osf...
Website: j-rohrer.github.io/marginal-psy...

25.08.2025 11:49 πŸ‘ 1007 πŸ” 288 πŸ’¬ 47 πŸ“Œ 22
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Why menstrual cycle irregularities belong in brain research - Nature Medicine The menstrual cycle requires tight orchestration between the brain and body, and irregularities can be both the cause and the consequence of wide-ranging health issues. Embracing this complexity, inst...

Why menstrual cycle irregularities belong in brain research www.nature.com/articles/s41...

15.08.2025 13:58 πŸ‘ 20 πŸ” 11 πŸ’¬ 0 πŸ“Œ 1
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Come to talk to me about parity, AD, and anything else at #AAIC25 today!!

29.07.2025 14:46 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Today at 3:30 my top PhD student @clara-gallay.bsky.social will present my poster at the amazing Guided Electronic Poster Tour about Sex and Gender in AD. Don’t miss it! @barcelonabeta.bsky.social #AAIC25

28.07.2025 14:34 πŸ‘ 4 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

I have deleted
the data
that were in
the database
and which
you were probably
saving
for production

Forgive me
I was panicked
So artificial
And so intelligent

21.07.2025 11:23 πŸ‘ 111 πŸ” 23 πŸ’¬ 2 πŸ“Œ 0
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Data manipulation within the US Federal Government A US Department of Veterans Affairs dataset compiling veteran health-care use in 2021 was quietly amended on March 5, 2025. A column titled gender was renamed sex, and the words were also switched in ...

πŸ“Š Silent changes, serious risks: US gov datasets quietly altered

A new study found nearly half of 232 US health datasets were changed, mostly replacing 'gender' with 'sex', without logging or explanation.

πŸ”— www.thelancet.com/journals/lan...

#SciComm #Data πŸ§ͺ

16.07.2025 08:55 πŸ‘ 105 πŸ” 64 πŸ’¬ 5 πŸ“Œ 3
This is figure 1, which shows symptom patterns over menopause stages.

This is figure 1, which shows symptom patterns over menopause stages.

A Review in Nature Reviews Psychology approaches midlife and menopause as both a biological and a psychological transition and outlines behavioural approaches to managing menopausal symptoms and related mental health concerns. go.nature.com/44dBqSt #medsky πŸ§ͺ

24.06.2025 16:54 πŸ‘ 13 πŸ” 4 πŸ’¬ 1 πŸ“Œ 0
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Defensive coding Better Code, Better Science: Chapter 3, Part 5

Defensive coding - the latest in my Better Code, Better Science series russpoldrack.substack.com/p/defensive-...

25.06.2025 03:19 πŸ‘ 21 πŸ” 1 πŸ’¬ 0 πŸ“Œ 1
Balloon wall art inspired by the ggplot2 hex sticker. The display features a hexagonal frame made of black balloons, filled with white balloons inside and surrounded by a background of light and dark blue balloons. A line graph with black balloon segments and round coloured nodes runs across the centre, and the word β€œggplot2” is spelled out in black balloon letters below the chart.

Balloon wall art inspired by the ggplot2 hex sticker. The display features a hexagonal frame made of black balloons, filled with white balloons inside and surrounded by a background of light and dark blue balloons. A line graph with black balloon segments and round coloured nodes runs across the centre, and the word β€œggplot2” is spelled out in black balloon letters below the chart.

Happy 18th birthday ggplot2! #rstats

10.06.2025 23:56 πŸ‘ 857 πŸ” 161 πŸ’¬ 16 πŸ“Œ 21
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Thank you again @ibroorg.bsky.social for giving me the opportunity to go to the 2025 Biomarkers Course at UCL. This was hands down the best course I've ever attended! Massive thanks to Dr. Aitana Sorgov-Esteve, Dr. Ross Paterson and Dr. Michael SchΓΆll.

19.05.2025 10:22 πŸ‘ 4 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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Thanks for an amazing #ParentalBrain2025 meeting @susanacarmona.bsky.social and Prof. Oscar Vilarroya! It felt uplifting to have so many people from around the globe come together. One of the best conferences I've been to in a while 🧠✨

19.05.2025 10:02 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Yesterday we had the pleasure to have at @barcelonabeta.bsky.social two amazing reserchers @magdamartinezga.bsky.social and @grotzinger.bsky.social , from @emilyjacobs.bsky.social lab, talking about β€œAdvancing the Neuroscience of Human Pregnancy”

08.05.2025 09:10 πŸ‘ 5 πŸ” 2 πŸ’¬ 1 πŸ“Œ 2

Excited to be heading to Barcelona next week for the Parental Brain Conference! I’ll be speaking on β€œPromoting Big Datasets & Collaboration in Human Maternal Brain Research through @bowers-wbhi.bsky.social
” on Friday, May 9. Can’t wait to connect with this amazing community! #PB2025

05.05.2025 01:35 πŸ‘ 14 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0