Nicholas Judd
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njudd.com
Nicholas Judd
@njudd.com
Jacobs & Pro Futura Scientia fellow
Researcher @ StockholmUni + Donders + Swedish Collegium
environment effects -> cognitive and neural dev
Reposted by Nicholas Judd
You can read both the manifesto and the report here: www.dejongeakademie.nl/en/news/3148... and some coverage in e.g. the @foliacivitatis.bsky.social here www.folia.nl/en/actueel/1...
Universities should be more ambitious in the climate transition, according to The Young Academy - De Jonge Akademie
News
www.dejongeakademie.nl
November 4, 2025 at 2:49 PM
A similar effect happens for telomeres, yet 13 editors agreed it shouldn't get past the desk.

Possibly it was seen as narrow in scope, yet education has one of the largest confounded effects with aging biomarkers. If this is happening for education... Mediterranean diets, etc watch out.
July 1, 2025 at 12:19 PM
Here, you can even see how the weight of evidence shifts across 6 different structural brain metrics related to aging when you look at educational attainment (correlational) and education from a policy change (causal).
July 1, 2025 at 12:11 PM
Using the largest sample of telomere length around (UK Biobank), we really find absolutely no effect from an additional year of education via a policy change. This mirrors our null finding for structural neuroimaging in Elife.
July 1, 2025 at 12:08 PM
As mentioned by others (Rentscher et al., AnnRev, 2020) the vast majority of this work isn't even longitudinal. It is just people cross-sectionally relating telomere length to [insert your favorite IV].

Our paper is (to my knowledge) the first natural experimental design on telomeres.
July 1, 2025 at 12:01 PM
Lots of prior work has related longer telomeres to a host of positive lifestyle factors - with often the explicit hx that engaging in these behaviors will slow down biological aging (aka build a cognitive reserve).
July 1, 2025 at 11:58 AM
Just saw this post on how Claude destroyed thousands of books to train it's models.

arstechnica.com/ai/2025/06/a...
Anthropic destroyed millions of print books to build its AI models
Company hired Google’s book-scanning chief to cut up and digitize “all the books in the world.”…
arstechnica.com
June 29, 2025 at 12:44 PM
Reposted by Nicholas Judd
A paper I find extremely interesting on the equivalence between fixed effects models and "tweaked" random effects models:

doi.org/10.1017/pan....
Understanding, Choosing, and Unifying Multilevel and Fixed Effect Approaches | Political Analysis | Cambridge Core
Understanding, Choosing, and Unifying Multilevel and Fixed Effect Approaches - Volume 30 Issue 1
doi.org
May 6, 2025 at 3:30 PM
Reposted by Nicholas Judd
Good question! I think in that setup just drawing the DAG (with repeated nodes) may be the starting point? The paper on outcome-wide longitudinal designs may also be helpful: content.sph.harvard.edu/wwwhsph/site... >
content.sph.harvard.edu
May 3, 2025 at 3:39 AM
Reposted by Nicholas Judd
This 2024 gem by @marinopagan.bsky.social has also changed how I think (about individual variability and the importance of complex systems to measure things we've never measured before):

www.nature.com/articles/s41...
Individual variability of neural computations underlying flexible decisions - Nature
Behavioural experiments to study decision-making in response to context-dependent accumulation of evidence provide testable models that are consistent with the heterogeneity in neural signatures among...
www.nature.com
April 30, 2025 at 7:47 PM