Eiko Fried
@eikofried.bsky.social
Professor of Mental Health & Data Science at Leiden University. Studying mental health problems as systems (http://eiko-fried.com). Building an early warning system for depression (http://WARN-D.com).
We have reached a situation where (1) the time/resources spent by people applying for grant X often outweighs (2) the time/resources awarded.
For these grants, society loses net time/resources.
www.nature.com/articles/d41...
For these grants, society loses net time/resources.
www.nature.com/articles/d41...
Client Challenge
www.nature.com
January 13, 2026 at 9:44 AM
We have reached a situation where (1) the time/resources spent by people applying for grant X often outweighs (2) the time/resources awarded.
For these grants, society loses net time/resources.
www.nature.com/articles/d41...
For these grants, society loses net time/resources.
www.nature.com/articles/d41...
Abstract submission to SAA Vienna has been extended by a bit until January 30. I hope to see many of you there — I really enjoyed the SAA conferences (Amsterdam, Ann Arbor, Leuven) in the last 3 years.
univie.eventsair.com/saa2026/
univie.eventsair.com/saa2026/
January 12, 2026 at 4:24 PM
Abstract submission to SAA Vienna has been extended by a bit until January 30. I hope to see many of you there — I really enjoyed the SAA conferences (Amsterdam, Ann Arbor, Leuven) in the last 3 years.
univie.eventsair.com/saa2026/
univie.eventsair.com/saa2026/
Our machine learning competition on forecasting depression is online! We'd love for as many people as possible to participate. Please share in your respective networks — thank you :).
www.staff.universiteitleiden.nl/announcement...
www.staff.universiteitleiden.nl/announcement...
Machine-learning competition on forecasting depression in young adults - Leiden University
After nearly 5 years of work, the research team led by Eiko Fried has finished data collection in the ERC-funded WARN-D project on building a personalised early warning system for depression. But just...
www.staff.universiteitleiden.nl
January 12, 2026 at 12:52 PM
Our machine learning competition on forecasting depression is online! We'd love for as many people as possible to participate. Please share in your respective networks — thank you :).
www.staff.universiteitleiden.nl/announcement...
www.staff.universiteitleiden.nl/announcement...
The actor who played Pippin is 57 years old
January 8, 2026 at 5:52 PM
The actor who played Pippin is 57 years old
Reposted by Eiko Fried
After 5 years of data collection, our WARN-D machine learning competition to forecast depression onset is now LIVE! We hope many of you will participate—we have incredibly rich data.
If you share a single thing of my lab this year, please make it this competition.
eiko-fried.com/warn-d-machi...
If you share a single thing of my lab this year, please make it this competition.
eiko-fried.com/warn-d-machi...
WARN-D machine learning competition is live » Eiko Fried
If you share one single thing of our team in 2026—on social media or per email with your colleagues—please let it be this machine learning competition. It was half a decade of work to get here, especi...
eiko-fried.com
January 7, 2026 at 7:39 PM
After 5 years of data collection, our WARN-D machine learning competition to forecast depression onset is now LIVE! We hope many of you will participate—we have incredibly rich data.
If you share a single thing of my lab this year, please make it this competition.
eiko-fried.com/warn-d-machi...
If you share a single thing of my lab this year, please make it this competition.
eiko-fried.com/warn-d-machi...
After 5 years of data collection, our WARN-D machine learning competition to forecast depression onset is now LIVE! We hope many of you will participate—we have incredibly rich data.
If you share a single thing of my lab this year, please make it this competition.
eiko-fried.com/warn-d-machi...
If you share a single thing of my lab this year, please make it this competition.
eiko-fried.com/warn-d-machi...
WARN-D machine learning competition is live » Eiko Fried
If you share one single thing of our team in 2026—on social media or per email with your colleagues—please let it be this machine learning competition. It was half a decade of work to get here, especi...
eiko-fried.com
January 7, 2026 at 7:39 PM
After 5 years of data collection, our WARN-D machine learning competition to forecast depression onset is now LIVE! We hope many of you will participate—we have incredibly rich data.
If you share a single thing of my lab this year, please make it this competition.
eiko-fried.com/warn-d-machi...
If you share a single thing of my lab this year, please make it this competition.
eiko-fried.com/warn-d-machi...
They should do the same for all psychology journals that contain causal claims.
"This material is only for use by causal inference professionals."
"This material is only for use by causal inference professionals."
Any idea what's going on with the message at the top for the new Mental Health Science journal? Never seen anything like that.
January 6, 2026 at 4:52 PM
They should do the same for all psychology journals that contain causal claims.
"This material is only for use by causal inference professionals."
"This material is only for use by causal inference professionals."
We're going live with our WARN-D depression onset machine learning competition tomorrow.
Would anyone be willing to read our final competition draft notes and provide feedback if this is fully understandable? It's a short word file.
Would anyone be willing to read our final competition draft notes and provide feedback if this is fully understandable? It's a short word file.
January 6, 2026 at 11:25 AM
We're going live with our WARN-D depression onset machine learning competition tomorrow.
Would anyone be willing to read our final competition draft notes and provide feedback if this is fully understandable? It's a short word file.
Would anyone be willing to read our final competition draft notes and provide feedback if this is fully understandable? It's a short word file.
Any idea what's going on with the message at the top for the new Mental Health Science journal? Never seen anything like that.
January 6, 2026 at 11:20 AM
Any idea what's going on with the message at the top for the new Mental Health Science journal? Never seen anything like that.
We wrote a short piece on conducting participatory workshops to change research culture, given our experiences in teaching workshops on climate activism & open scholarship.
With @anne-urai.bsky.social @clarekelly.bsky.social @annaveer.bsky.social
📝 rdcu.be/eXja4
🧪 #AcademicSky
With @anne-urai.bsky.social @clarekelly.bsky.social @annaveer.bsky.social
📝 rdcu.be/eXja4
🧪 #AcademicSky
How to change research culture with participatory workshops
Nature Human Behaviour - Changing research culture begins with the kind of engaged, collaborative, critical reflection that can spark collective action. This Comment outlines how to design...
rdcu.be
January 6, 2026 at 11:08 AM
We wrote a short piece on conducting participatory workshops to change research culture, given our experiences in teaching workshops on climate activism & open scholarship.
With @anne-urai.bsky.social @clarekelly.bsky.social @annaveer.bsky.social
📝 rdcu.be/eXja4
🧪 #AcademicSky
With @anne-urai.bsky.social @clarekelly.bsky.social @annaveer.bsky.social
📝 rdcu.be/eXja4
🧪 #AcademicSky
Did not think I'd witness a Nature journal publish a piece calling the US a fascist country in the title / abstract.
Thanks to Lauren and the rest of the team for picking up this crucial fight — in this paper and elsewhere. Please read and share widely.
Thanks to Lauren and the rest of the team for picking up this crucial fight — in this paper and elsewhere. Please read and share widely.
Just accepted at Nature Mental Health:
Crises and Opportunities for Psychological Science under Fascism
https://doi.org/10.31234/osf.io/nz42x_v3
1/9
Crises and Opportunities for Psychological Science under Fascism
https://doi.org/10.31234/osf.io/nz42x_v3
1/9
January 6, 2026 at 11:03 AM
Did not think I'd witness a Nature journal publish a piece calling the US a fascist country in the title / abstract.
Thanks to Lauren and the rest of the team for picking up this crucial fight — in this paper and elsewhere. Please read and share widely.
Thanks to Lauren and the rest of the team for picking up this crucial fight — in this paper and elsewhere. Please read and share widely.
Interesting take (including shared simulations) on the study.
This paper had a pretty shocking headline result (40% of voxels!), so I dug into it, and I think it is wrong. Essentially: they compare two noisy measures and find that about 40% of voxels have different sign between the two. I think this is just noise!
Would love to hear expert views on this paper. It appears to show that the operationalization of brain activity the field has relied on for 3 decades—the BOLD response—is not actually a sensible measure of brain activity.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
January 6, 2026 at 10:40 AM
Interesting take (including shared simulations) on the study.
Reposted by Eiko Fried
Feel like this fresh year needs some serious culture change?
We got you covered! With @clarekelly.bsky.social @eikofried.bsky.social Anna van 't Veer
📝 rdcu.be/eXja4
We got you covered! With @clarekelly.bsky.social @eikofried.bsky.social Anna van 't Veer
📝 rdcu.be/eXja4
January 5, 2026 at 3:46 PM
Feel like this fresh year needs some serious culture change?
We got you covered! With @clarekelly.bsky.social @eikofried.bsky.social Anna van 't Veer
📝 rdcu.be/eXja4
We got you covered! With @clarekelly.bsky.social @eikofried.bsky.social Anna van 't Veer
📝 rdcu.be/eXja4
Would love to hear expert views on this paper. It appears to show that the operationalization of brain activity the field has relied on for 3 decades—the BOLD response—is not actually a sensible measure of brain activity.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
BOLD signal changes can oppose oxygen metabolism across the human cortex - Nature Neuroscience
Using quantitative brain imaging, the authors show opposite fMRI BOLD signal to metabolic activity due to variable oxygen extraction across the human cortex. This questions the canonical interpretatio...
www.nature.com
January 5, 2026 at 11:55 AM
Would love to hear expert views on this paper. It appears to show that the operationalization of brain activity the field has relied on for 3 decades—the BOLD response—is not actually a sensible measure of brain activity.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Guardian headline vs small print.
January 4, 2026 at 4:00 AM
Guardian headline vs small print.
Reposted by Eiko Fried
The FIFA Peace prize used to mean something
January 4, 2026 at 2:14 AM
The FIFA Peace prize used to mean something
So anyway, how is your New Years Eve going ..
December 31, 2025 at 7:52 AM
So anyway, how is your New Years Eve going ..
Reposted by Eiko Fried
Today the Swiss announced they don't have an agreement with Springer Nature -- swissuniversity tried to secure a deal and failed in the face of the extreme rise in publishing fees.
When the game is rigged, it's better to stop playing.
🧵 to understand the drain of scientific publishing👇
When the game is rigged, it's better to stop playing.
🧵 to understand the drain of scientific publishing👇
December 22, 2025 at 9:47 PM
Today the Swiss announced they don't have an agreement with Springer Nature -- swissuniversity tried to secure a deal and failed in the face of the extreme rise in publishing fees.
When the game is rigged, it's better to stop playing.
🧵 to understand the drain of scientific publishing👇
When the game is rigged, it's better to stop playing.
🧵 to understand the drain of scientific publishing👇
Reposted by Eiko Fried
Journal article: “the data are available on request”
The data:
The data:
December 20, 2025 at 11:33 AM
Journal article: “the data are available on request”
The data:
The data:
Reposted by Eiko Fried
This smells distinctly like collider bias and/or selection bias and/or regression to the mean... You simply can't select teen prodigies, and world class athletes rom databases, and go run regressions without serious consideration of the selection process!
"Most top achievers (Nobel laureates and world-class musicians, athletes, chess players) demonstrated lower performance than many peers during their early years. Across the highest adult performance, peak performance is negatively correlated with early performance" www.science.org/doi/10.1126/...
Recent discoveries on the acquisition of the highest levels of human performance
Scientists have long debated the origins of exceptional human achievements. This literature review summarizes recent evidence from multiple domains on the acquisition of world-class performance. We re...
www.science.org
December 20, 2025 at 3:48 PM
This smells distinctly like collider bias and/or selection bias and/or regression to the mean... You simply can't select teen prodigies, and world class athletes rom databases, and go run regressions without serious consideration of the selection process!
Our university press team asked me a few questions in regards to the new chair on Mental Health & Data Science. I sketch a bit of a vision on the importance of transdisciplinary work, and some obstacles to overcome.
www.universiteitleiden.nl/en/news/2025...
www.universiteitleiden.nl/en/news/2025...
Transdisciplinary work is fantastic, but requires dedicated efforts from all sides to understand each other’
Eiko Fried has been appointed professor of Mental Health & Data Science. This combined chair neatly fits the view that understanding complex mental health issues require the integration of statistical...
www.universiteitleiden.nl
December 19, 2025 at 8:18 AM
Our university press team asked me a few questions in regards to the new chair on Mental Health & Data Science. I sketch a bit of a vision on the importance of transdisciplinary work, and some obstacles to overcome.
www.universiteitleiden.nl/en/news/2025...
www.universiteitleiden.nl/en/news/2025...
Reposted by Eiko Fried
I've used Lavaan almost every (work)day for 15 years, but this open source labour of love has never received proper institutional support. I'm delighted to be a small part of an 1.5M OpenScienceNL award, led by Jorgensen, to completely revamp and futureproof Lavaan www.openscience.nl/en/news/45-p...
December 18, 2025 at 7:44 AM
I've used Lavaan almost every (work)day for 15 years, but this open source labour of love has never received proper institutional support. I'm delighted to be a small part of an 1.5M OpenScienceNL award, led by Jorgensen, to completely revamp and futureproof Lavaan www.openscience.nl/en/news/45-p...
Reposted by Eiko Fried
Nice writeup of our new study in @jamapsychiatry.com by Kyle Mittan, a colleague here at @uarizona.bsky.social
news.arizona.edu/news/confuse...
news.arizona.edu/news/confuse...
December 17, 2025 at 5:13 PM
Nice writeup of our new study in @jamapsychiatry.com by Kyle Mittan, a colleague here at @uarizona.bsky.social
news.arizona.edu/news/confuse...
news.arizona.edu/news/confuse...