A new publication from my PhD project on model selection for nonstationary time-series data is out, co-authored with an amazing team (Anja Franziska Ernst, @ginettelafit.bsky.social , Ward B. Eiling, @bringmannlaura.bsky.social)! Link: doi.org/10.1111/bmsp...

Out now at PSPR: our love letter to the personality trait of Openness! Amber Thalmayer and I identify and (try to) explain the many ways that openness/intellect is the weirdest & WEIRDest of the Big Five. (Big improvements over the old preprint! thx reviewers) journals.sagepub.com/eprint/HBGXT...

Reproducible Research in Collaboration: Join our free workshop on writing academic texts on GitHub together by Aaron Peikert and me on November 28 in Berlin! More information & registration: www.formr-uni-siegen.de/collab-works...

1st day of #MITNB meeting at @tesc-tilburgu.bsky.social. Excited for the week ahead, where we'll tackle measurement issues in #ESM, e.g. modeling processes across timescales, building a formal theory on measurement, and evaluating statistical assumptions in #ESM data. Go teamwork <3

Simulation studies have a conflict of interest problem. The same team: - develops a new method - designs a simulation study to evaluate it However, the new method has to show good performance to get published. We propose living synthetic benchmarks to address the issue (doi.org/10.48550/arX...).

We built the openESM database: ▶️60 openly available experience sampling datasets (16K+ participants, 740K+ obs.) in one place ▶️Harmonized (meta-)data, fully open-source software ▶️Filter & search all data, simply download via R/Python Find out more: 🌐 openesmdata.org 📝 doi.org/10.31234/osf...

In this behemoth effort led by @anhhtran.bsky.social, we reanalysed 11 experience-sampling datasets, and found limited evidence that context (intensity, controllability, and social features) meaningfully shaped everyday emotion regulation strategy use.

Had a great time at the ESM Expert Network Meeting in Rotterdam! I presented the first SHARE study results: we found that paying participants per beep boosts compliance as compared to bulk payment (with or without personalised feedback)—and without harming data quality. Poster: tinyurl.com/47asuaxj

We already know that lagged effects in CLPMs are likely to be upwardly biased, but just how easy is it to find significant effects? Way too easy. I tested CLPMS in 100 randomly selected pairs of correlated variables and found significant effects in 98 of them. New preprint: osf.io/preprints/ps...

🚨 New preprint: We compared 13 methods for detecting momentary careless responding in the WARN-D data (206k+ obs.). Tutorials guide you through each method. The takeaway? Diverging results, inherent subjectivity (to varying degrees), and a clear need for further validation. osf.io/preprints/ps...

Early career personality researchers coming to the Edinburgh ECP22: If you want to get a link to a slightly more affordable uni accommodation option later this year, leave your email here: docs.google.com/forms/d/e/1F...

Very excited to share our new manuscript accepted at JPSP: "Cultural Differences in the Personality Triad: The Interplay of Personality Traits, Situation Characteristics, and Behavioral States Around the World"

The same pattern also shows up for personality traits 👇 journals.sagepub.com/doi/10.1177/...

Excited to share this new preprint with Simon Breil, Katharina Utesch & Mitja Back: "Predicting More Behavior More of the Time: On the Behavioral Nature of Different Personality Trait Measures" osf.io/preprints/ps...

New and improved 😆 Those who were at the first training will know we needed to 🤦‍♀️ See you tomorrow, we're so thrilled to see all of the interest in supporting @psyarxivbot.bsky.social

New paper by @bsiepe.bsky.social & WARN-D team out now in JoPACS, on the (lack of) relation between EMA selfreport and Garmin passive data. Guardian @theguardian.com coverage: www.theguardian.com/technology/2... Paper: psycnet.apa.org/doiLanding?d... 🧪 #PsychSciSky #StatsSky #EpiSky

New paper: In the context of self-regulated learning, if LLMs reliably simulated survey responses, they could be used to test interventions, refine theoretical models, & augment sparse datasets; but the psychometric validity of the responses depends on the LLM. www.sciencedirect.com/science/arti...

🇩🇪 3-year universal basic income (UBI) study, in which n=120 received UBI, n=1500 did not. Website is pretty neat, check it out for core findings. www.pilotprojekt-grundeinkommen.de/en

New preprint: osf.io/8c6sz_v1 @mdkraemer.bsky.social and I, with our fantastic co-authors Cornelia Wrzus, Yannick Roos and @drichter77.bsky.social examined how social contact, desire, and affect dynamically interact across different modalities (in-person, digital) and time scales (hourly, daily).

Are you working on issues of replication and reproducibility of methodological research in psychology? Consider submitting a proposal to my call for papers, happy to chat about your ideas or answer any questions! www.psychologicalscience.org/publications...

Self-control in daily life is more than willpower — but how well do commonly used trait scales capture this recent, broader view on self-control? New preprint with @kaihorstmann.bsky.social & @mhennecke.bsky.social: osf.io/preprints/ps... Short summary below.

Self-improvement, self-acceptance, and/or methods effects? Travis Miller, @chopwood.bsky.social , and @wiebkeb.bsky.social, and I examined factors that might explain personality change intervention effects - now in print at JPSP 🥳: doi.org/10.1037/pspp...

Gender Differences in Personality Traits and Average Personality States: Using Experience Sampling to Circumvent Bias in Self-Reports: https://osf.io/a573g

Join @simine.com, @tomhardwicke.bsky.social, and @bethclarke.bsky.social for a workshop on writing transparent, reproducible, and rigorous research papers on June 23 in Berlin! Register here: www.formr-uni-siegen.de/publishing-w...

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...

New post: I was curious about the consensus statement on social media effect and wondered how the sausage gets made. rubenarslan.github.io/posts/2025-0...

My editorial on how journals can earn trust. We often use journal names as proxies for quality. This is bad bc it’s not valid. But it could be. Editors could make journal name a valid signal. And we could place value on journals that show us how they do that. journals.sagepub.com/doi/full/10....

Folks, universities here are have decided to cut international psychology programs, which will be devastating to psychological science in the Netherlands. Please consider signing this open letter on behalf of my colleagues and me; anybody can sign. openletter.earth/against-lang...

Can we use features of dynamic networks (e.g. centrality) to improve treatment selection and outcome prediction? New preprint on the topic: We highlight the role of uncertainty & introduce a Bayesian multilevel approach for uncertainty quantification of network features 🧵 osf.io/preprints/ps...

I am looking forward to expanding the scope of my professorship by combining cognitive and statistical modeling with LLMs😊 There will be two job openings for postdoc positions soon - one starting in September 2025 and another one a year later.

Four large Dutch universities, including Leiden University where I work, have decided to throw international psychology bachelor programs under the bus in an effort to appease the rightwing government. Here's my blog why this is a terrible idea. eiko-fried.com/cutting-inte...

“…today’s antivirals are so effective that if taken during pregnancy, the risk of passing HIV to the infant is minimal. Without these drugs, around a quarter of babies born to HIV-positive mothers would also contract the virus – and half of them would die before the age of two.”

We're hiring a postdoc in the FEEL lab at the University of Melbourne. Deadline May 12: get in touch if you have questions! jobs.unimelb.edu.au/caw/en/job/9...

New article at EJP 🥁🥁🥁 Social #interactions with different types of interaction partners are systematically linked to #personality states in #adolescence, while the contribution of social interaction partners to personality development seems more complex. Link: journals.sagepub.com/doi/10.1177/...

🚨 Job alert - please share! I'm looking for a doctoral researcher (3 years, 75%) to join my #ERC project #Loneliness across time and space (LOTIS) at @ruhr-uni-bochum.de, starting June 1 or later. Details in thread 👇 #PsychSciSky

I've been getting a lotta (positive!) feedback on this interview with PBS News Hour. It was sort of weird: Each question was of the form: "okay, but what about this argument for the Trump tariffs"? I just tried to use it as a teaching opportunity.

Spectacular view of 100,000 people attending the #HandsOff march in NYC

Yes!!! Check out our new preprint on checking the validity of ESM data using Qualitative methods. Just accepted in Psychological Assessment! Mixed-Methods for the win!

Die Bro-Ko

1/x My NIH grant that would collect data to help *prevent suicidal thoughts and behaviors* among LGBTQ+ people was terminated today, along with many other LGBTQ+ focused grants. These terminations make no sense scientifically. Here's why:

Reproducible Research in R: Join the workshop on 'How to Do the Same Thing More Than Once' led by Dr. Aaron Peikert and Hannes Diemerling (Max Planck Institute for Human Development) on May 12th in Berlin!

Want to make nice graphs with me, starting this summer? I am hiring for two PhD positions at the University of Witten/Herdecke.

Tens of thousands of psychological measures have been created, but 79% are not reused more than twice. In a new article in NHB lead by @faridanvari.bsky.social and @ruben.the100.ci we quantify this fragmentation in psychology's measures and propose solutions. www.nature.com/articles/s41...

7 years ago, I received funding for a project on personality, incentivized prosocial behavior & social status in groups. Today, we've made the anonymized data publicly available. Researchers can now use it by citing the preprint/paper (no need to add anyone as a coauthor): doi.org/10.31234/osf...

Dissertation by Dr Rachel Los not only includes acknowledgements, but also .. anti-acknowledgements. delta.tudelft.nl/en/article/a...

✨ Excited to share our new preprint: osf.io/preprints/os... ✨ In this paper, Nick Jacobson and I dive into the challenges researchers face when developing prediction models for just-in-time adaptive interventions (JITAI). 🧵👇 #EMA #JITAI #CrossValidation #PassiveSensing

Tomorrow I’ll be part of a panel discussing psychology’s reform movement, looking back over the last 10+ years! You can register to attend here: improvingpsych.org/sips-2025-pr... Wednesday 18 Dec at: 11:30am Pacific US time 2:30pm Eastern US 8:30pm Europe 6:30am Thur in Sydney/Melb Please share!

✨New Preprint (w/ Anna Lichtwarck-Aschoff & Fred Hasselman): Examining the Feasibility of Nonlinear Vector Autoregressions for Psychological Intensive Longitudinal Data In this preprint, we report a new method to involve quadratic and interaction terms in VAR (networks)! osf.io/preprints/ps...

If you want to do ambulatory assessment (e.g., EMA) in applied settings, say with patients, how many observations do you need to get a reliable estimate of a person's mean, variability, or correlation? We (@jzpsych.bsky.social & Florian Scharf) ran some simulations to get the answer...a🧵

#SPSP2024 I'm co-chairing a symposium with @anabelbuechner.bsky.social on goal conflicts, featuring work from us, Jiabi Wang, & Dr. Hengchen Dai. We used diverse methods (experimental, psychometric, longitudinal, machine learning, cross-cultural, etc.) to study goal conflicts in various contexts.