Parker Singleton

@parkersingleton.bsky.social

Senior Scientist at Penn Lifespan Informatics and Neuroimaging Center (PennLINC) studying psychedelics and the brain. sypres.io

Here's bonus slides on cross-validation tests, separate from our preprint. Covering: 1. paired (sign-flip) permutation test 2. label-swap permutation test 3. sample-level vs fold-averaged stats 4. a common misapplication of the corrected t-test 5. three bootstrap variants 1/N

Thomas Yeo@bttyeo.bsky.social · 3mo ago

In a meta-analysis of 210 biomedical AI studies that statistically compared models under cross-validation, 97% used invalid statistical tests. Here's our new preprint doi.org/10.64898/202... led by @tianchu.bsky.social @hetuli.bsky.social @shaoshiz.bsky.social @nichols.bsky.social 1/N

This paper has been a long time coming. Instead of reanalyzing the same old resting-state fMRI datasets, we combined nearly all datasets around the world. Note that we didn't exactly find indisputable evidence for "default mode network disintegration." www.nature.com/articles/s41...

An international mega-analysis of psychedelic drug effects on brain circuit function - Nature Medicine

Analysis of neuroimaging datasets across five major psychedelics revealed a shared brain signature and provides a comprehensive insight into how these drugs reorganize brain architecture.

nature.com

Very happy that this paper from our lab is now out in @pnas.org! What happens when the *same* person experiences the *same* information with a *different* interpretation? Nearly the whole 🧠—well, at least nearly all association cortex—changes how it represents that information! tinyurl.com/p8chj2j7

PNAS

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

tinyurl.com

🧠 Resting-state fMRI is often treated as the gold standard for studying the brain’s intrinsic organization. But is it actually the best way to estimate functional architecture? We tested this directly. 🧵1/8

💊 🍸 Risk for substance use disorder (SUD) rises in adolescence. Family history and biological sex play major roles in a person's level of SUD risk. New evidence suggests neural markers of SUD may exist before substance use starts - yet how these markers differ across sexes is not understood.

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