The Max Planck Society has begun an exploratory round table for open science. We are drafting some recommendations to leadership. Still a long way to go! But here are my notes on the most recent draft, just so you all know how I am trying to steer things.

This paper is now out in print: journals.sagepub.com/doi/10.1177/... TLDR still holds.

Excited to share a Registered Report in J. of Personality looking at the “perils of partialing” – led by the Bluesky-less Leigha Rose with @drlynam.bsky.social and me. (1) onlinelibrary.wiley.com/doi/10.1111/...

We just preprinted a huge meta-meta-analysis examining the effects of exercise on cognition, memory, and executive function In short - 2239 effect sizes - extreme between-study heterogeneity - extensive publication bias - some subgroup/exercise-specific effects More below (doi.org/10.31234/osf...)

Very useful table of insufficient examples vs. best-practices for statistical reporting! Will definitely point some of my colleagues to it! 📈

Massive and important undertaking by @andrew-cast.bsky.social, @drlynam.bsky.social, and co in estimating when interaction effects stabilize in linear regression Tldr: Under realistic conditions for psych research, N = 3,800

When do interaction/moderation effects stabilize in linear regression?: https://osf.io/35t84

Exciting news from the Academy of Psychological Clinical Science--a joint effort to enhance open science training in clinical psychology! If you are interested, you can the papers mentioned in the email here: Van Til et al. osf.io/h34jg/files/... OSC paper (Lynam et al.) osf.io/preprints/ps...

Love to see a registered report that reinforces why the registered report is such a valuable tool

Interactions are difficult to detect in field studies as they are typically tiny--very small to start with and made smaller by the joint unreliabilities of the components. Here, we find some but the contribution to explained variance is negligible. Call off the search. It is not worth the effort.

Pretty excited about this one. In this paper, we discuss the replication/credibility crisis, the factors that contribute to it, and clinical psychology's slow (really slow) progress in dealing with it. We offer a competency-based fraemwork for improving our training of future scholars. 1/2

Rigorous science is transparent science.

New paper led by @drlynam.bsky.social on the need for more training in and engagement with open science practices in clinical psych programs. It has been difficult to make progress due to a variety of barriers, including students working in labs uninterested or hostile to these approaches.

Just accepted from @vizecolin.bsky.social and myself. We coded Open Science practices (preregistration, RRs, open data, and open code) from 2021 to 2024 in two personality disorder journals (JPD, PDTRT) and three personality journals *JOP JRP, and EJP). osf.io/preprints/ps... 1/5

𝐀𝐝𝐝𝐢𝐭𝐢𝐯𝐞 𝐚𝐧𝐝 𝐈𝐧𝐭𝐞𝐫𝐚𝐜𝐭𝐢𝐯𝐞 𝐑𝐞𝐥𝐚𝐭𝐢𝐨𝐧𝐬𝐨𝐟 𝐏𝐞𝐫𝐬𝐨𝐧𝐚𝐥𝐢𝐭𝐲 𝐚𝐧𝐝 𝐂𝐨𝐠𝐧𝐢𝐭𝐢𝐨𝐧 𝐖𝐢𝐭𝐡𝐄𝐱𝐭𝐞𝐫𝐧𝐚𝐥𝐢𝐳𝐢𝐧𝐠 𝐁𝐞𝐡𝐚𝐯𝐢𝐨𝐫𝐬 | "Although interaction effects were detected, they were small and practically negligible in their explanation of variance in externalizing behaviors" journals.sagepub.com/doi/10.1177/...

This imagery is the kind of thing you see in video games to let you know you’re in a totalitarian city or country.

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...

For those interested, here is a link to a new power paper: Hancock, G. R., & Feng, Y. (2026). nmax and the quest to restore caution, integrity, and practicality to the sample size planning process. Psychological Methods. yifengquant.github.io/Publications...

Really appreciate the authors’ efforts to differentiate these practices. I’ve definitely seen the term “preregistration” used to describe each of these three (registration, protocol, analysis plan) in isolation of one another, so it’s great to have a framework to address these jingle-jangle issues

We don't really think one will be able to cleanly divide the personality disorders from Axis I disorders. We argue (following Lilienfeld's writing on psychopathology's distinction from normality) that it is a Roschian construct such that there won't be an easy way to cleave PDs from other disorders.

For another perspective... pubmed.ncbi.nlm.nih.gov/37523287/

Over 90 pages of "Alligator Alcatraz" files disappeared as I was looking at them and reporting on the situation. Our public records requests are getting stonewalled. A slew of experts told me this all seems to be illegal. talkingpointsmemo.com/muckraker/th...

Let us know what you think!

Question for my open science peeps! @nphillips36.bsky.social and I are working on a lit review where we’re coding whether or not manuscripts have open data. How should we handle cases where authors provide links to big, “open” datasets? In some of these cases, the data are hidden behind so much…

Reposting for the morning crowd — recs would be appreciated!

For the quanty folks: Any go-to readings comparing approaches to modeling nonlinearity? Seeing more on splines, fractional polynomials, etc., but struggling to find clear head-to-head comparisons or discussions of tradeoffs.

Final vote. 50-50. VP breaks the tie. One single GOP Senator could have stopped this abomination. Saved millions of parents from watching their child go hungry. Saved the lives destroyed when Medicaid disappears. They will all live forever with the horror of this bill.

It's a good time to be an antagonism researcher (because of this issue and for the many other reasons)

@drandreahoward.bsky.social, hold my beer.. Latent class growth models are worse than useless, and we've known this for more than 20 years. (See Bauer 2007)

Looooong past time. Tbh, I can’t believe this needs to be said.

A *null* result I'm very proud of! Led by Rustam Romaniuc, 35 coauthors from all over France tested nudge interventions to boost voter turnout. None worked, and we are possibly not surprised -- but a well-powered null result *is* a result! Paper: kwnsfk27.r.eu-west-1.awstrack.me/L0/https:%2F...

The field has to accept that there is no good science without transparency. Transparency does not guarantee good science but only transparent science can be good (i.e. credible).

As expected, RFK Jr. was lying during his confirmation hearing and now is ratfucking the vaccination system in the US. The vast majority of the public does not want this and yet again it’s clear that the Republican administration does not serve the electorate.

"No study reached the sufficient sample size to detect a medium effect"

I can’t think of a presidency that has done more open and undeniable damage to this country, and the wider world, in such a short space of time, than this one. Shocking, despicable:

This should absolutely be a scandal which people lose their jobs over. You'd have to assume that anyone in power actually cares though to think that would happen, which obviously would be a bold assumption in present circumstances.

Excited to see Leigha Rose's thesis in print at CPS. Tested whether psychopathic traits change over 10 years in middle-later life. Little evidence of change across domains. When traits did change, they were correlated with changes in health/functioning. journals.sagepub.com/doi/epub/10....

Check out our forthcoming viewpoint article in the Journal of Psychopathology and Clinical Science in which we argue that it is well past time to abandon the term 'dark' to describe antagonistic traits. w/ @jdmiller.bsky.social and @drlynam.bsky.social osf.io/preprints/ps...

Extremely excited to share the first effort of the Revived Genomics of Personality Consortium: A highly-powered, comprehensive GWAS of the Big Five personality traits in 1.14 million participants from 46 cohorts. www.biorxiv.org/content/10.1...

Crystal Palace have done it. They have won their first ever major trophy. Oliver Glasner's side beat Manchester City 1-0 in the FA Cup final at Wembley. Selhurst Park's immortals. #FACupFinal

Reposting this for the morning crowd. Any recs would be very appreciated!

Question for the hive mind: @courtlandhyatt.bsky.social and I are conducting a scoping review that requires us to download all articles published in multiple academic journals over several years. Anybody know of a way to do this that doesn't require us to individually download each article?

World leaders in traumatic stress have written this editorial to express concerns about the global impact of what is happening in U.S., how decisions are impacting exposure to and consequences of trauma www.tandfonline.com/doi/full/10.... @ejpt.bsky.social @istss.bsky.social @estss.bsky.social

Happy to see this one now online: journals.sagepub.com/doi/10.1177/... Check it out and let us know what you think!

Paper now in print: psycnet.apa.org/record/2025-... tl;dr - undergrads' data are no better nor worse when taking surveys at home rather than in person (data from both contexts require scrutiny).

Proud to share this new meta-science article—our analysis of 255 preclinical opioid addiction studies highlights a pressing need for better transparency and reproducibility. Big thanks to Justine Blackwell and @alexh.bsky.social – it was an honor working with you on this project! :)

well said, @jdmiller.bsky.social. I find the resistance to transparency the most disturbing and damning thing about our field. I get the feeling that we can have your undisclosed researcher degrees of freedom only when we pry them from your cold dead fingers.

Really dig this paper and kudos to the authors on a methodologically rigorous, transparent evaluation of a widely used measure of social cognition across nine (!) existing datasets. Well worth checking out

Great to see this officially published over at PDTRT w/ coauthors Leigha Rose, @drlynam.bsky.social, and @jdmiller.bsky.social! Here's the link for those interested: psycnet.apa.org/doiLanding?d...

I can't really see any downsides to sharing code -- it's very simple and many concerns that apply to data sharing don't apply at all -- so I really hope we can get that number up all the way, until it's just a no-brainer.