Sign in

Siwei Liu

@siweiliu.bsky.social
146 followers 88 following 18 posts

Professor & Director of the Intensive Longitudinal Methods Lab at UC Davis. siweiliu.weebly.com

PostsRepliesMedia
Reposted by Siwei Liu
moin syed @syeducation.bsky.social · 01/10/2026
Gave a talk in my dept. on the OSF transition. I wrote up a rough script of the session, which could be of interest to others. I synthesize existing resources and provide my own perspectives. Comments and corrections welcome! zenodo.org/records/2306...
the header for a paper describing "Life after OSF" #metascience
215072
Reposted by Siwei Liu
Laura M Stapleton @lauramstapleton.bsky.social · 28/06/2026
Quantitative Methodologists out there… we are hiring at the Assistant Professor level! Please consider joining our community! umd.wd1.myworkdayjobs.com/en-US/UMCP/j...
umd.wd1.myworkdayjobs.com
Assistant Professor
Job Description Summary Organization's Summary Statement: The Quantitative Methodology: Measurement and Statistics (QMMS) program in the Department of Human Development and Quantitative Methodology (H...
21916
Reposted by Siwei Liu
Leonie Vogelsmeier @leonievogelsmeier.bsky.social · 01/06/2026
Dr. Mihai Constantin, Prof. Dr. Jeroen Vermunt, and I are looking for a motivated PhD candidate for the project: "Dynamic Mixture Modeling for Intensive Longitudinal Data". tiu.nu/23934 Please share this vacancy with anyone who might be interested!
tiu.nu
Job opening: PhD in Methodolgy and Statistics (23934)
086
Reposted by Siwei Liu
Aaron Fisher @aaronjfisher.bsky.social · 20/05/2026
We just got approved to hire a teaching professor in Quantitative Methods! This is the *very* rare tenure track teaching position at Berkeley. I'll be chairing the search committee. Official job ad coming later this summer!
212366
Reposted by Siwei Liu
Philip N Cohen @philipncohen.com · 14/05/2026
Two new facts stand out: 1. 85% of hallucinated citations in preprints are also in the subsequent journal version (thanks, peer review!) 2. Fake cites more likely to use the names of (male) scholars who are already highly cited, creating a fake-citation Matthew effect. arxiv.org/abs/2605.07723
arxiv.org
LLM hallucinations in the wild: Large-scale evidence from non-existent citations
Large language models (LLMs) are known to generate plausible but false information across a wide range of contexts, yet the real-world magnitude and consequences of this hallucination problem remain p...
18627297
Reposted by Siwei Liu
Dalmeet Singh Chawla @dalmeet.bsky.social · 19/05/2026
#arXiv is banning researchers for one year whose manuscripts contain hallucinated references. My latest for @nature.com: www.nature.com/articles/d41... @briannosek.bsky.social, @tdietterich.bsky.social, @richardsever.bsky.social, @dermotlynott.bsky.social, @philipncohen.com, #WCRI2026
nature.com
Researchers who use hallucinated references to face arXiv ban
The preprint server is the latest to impose stiff penalties on authors who contribute to AI ‘slop’ — but not everyone is convinced it’s the right approach.
15029
Siwei Liu @siweiliu.bsky.social · 06/05/2026
New paper alert! An individual-level meta-analysis on how daily physical activity relates to affective well-being at the within-person and between-person levels. A huge effort led by Johanna Rehder, Markus Reichert, and their team.🎉🎉🎉 www.nature.com/articles/s41...
nature.com
An individual participant data meta-analysis of how physical activity relates to affective well-being in daily life - Nature Human Behaviour
In this individual participant data meta-analysis, and across 321,345 smartphone-ratings of affective well-being and nearly 1 million hours of physical activity measurement, Rehder et al. clarify the ...
010
Reposted by Siwei Liu
Pam Davis-Kean, PhD @umpamdk.bsky.social · 03/04/2026
The NSF 2027 budget has noted that they will close out the Social, Behavioral, and Economic Science Program (SBE). This is not a good thing. nsf-gov-resources.nsf.gov/files/FY-202...
22552394
Reposted by Siwei Liu
Matt Graham @mattgraham.bsky.social · 02/03/2026
Have examples of social science papers that use DAGs to justify their controls? I find these very hard to come by & would like to use for teaching.
393
Reposted by Siwei Liu
Teague Henry @teaguerhenry.bsky.social · 15/01/2026
Hello all! I’m recruiting a postdoc to work with my lab and I on methods for analyzing intensive longitudinal timeseries of psychological phenomena, with particular focus on measurement and optimization of interventions! Start would be August 2026
jobs.virginia.edu
Research Associate in Psychology in Charlottesville, Virginia, United States of America | Research at University of Virginia
Apply for Research Associate in Psychology job with University of Virginia in Charlottesville, Virginia, United States of America. Research at University of Virginia
082
Reposted by Siwei Liu
Leonie Vogelsmeier @leonievogelsmeier.bsky.social · 15/01/2026
📢 Call for Papers: We’re excited to announce an upcoming Psychometrika Special Issue on Data Intensive Methods in Psychometrics (think of using many datasets for methodological development), guest edited by @klint.bsky.social, @kyliegorney.bsky.social, @jmbh.bsky.social, Ben Domingue, and me.
psychometricsociety.org
055
Reposted by Siwei Liu
Thomas Lumley @tslumley.bsky.social · 08/01/2026
Which is why assumptions you can check aren't very helpful: if an assumption doesn't cost anything it won't buy much
2186
Reposted by Siwei Liu
Eiko Fried @eikofried.bsky.social · 07/01/2026
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...
eiko-fried.com
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...
5190160
Reposted by Siwei Liu
Anthony D. Ong @anthonyong.bsky.social · 13/12/2025
Call for papers: Emotion special issue on Affect Dynamics Across Multiple Timescales (moments→days→years) and links to mental and physical health. Letters of intent due Jan 15, 2026. Details/submission: www.apa.org/pubs/journal... Please share with colleagues/trainees. @affectscience.bsky.social
apa.org
02218
Reposted by Siwei Liu
Cassie Boness, PhD @cassie-boness.bsky.social · 07/11/2025
Come work with us @unm.edu 🤩
099
Reposted by Siwei Liu
Alona Fyshe @alonaf.bsky.social · 31/10/2025
I'm hiring (another) post doc, this time in collaboration with Natalie Brito @nataliebrito.bsky.social at Columbia! We will be exploring some of the characteristics of human development using deep learning models. Email with questions! iaejup.fa.ocs.oraclecloud.com/hcmUI/Candid...
iaejup.fa.ocs.oraclecloud.com
Postdoctoral Fellow - Large Language Models as Models for Human Development
This position is part of the Post Doctoral Fellows Association and has an initial appointment of two years. This position has a comprehensive benefits package. Location - This role is in-person at Nor...
084
Reposted by Siwei Liu
Brendan Nyhan @brendannyhan.bsky.social · 21/08/2025
New job ad: Assistant Professor of Quantitative Social Science, Dartmouth College apply.interfolio.com/172357 Please share with your networks. I am the search chair and happy to answer questions!
2177168
Reposted by Siwei Liu
Aidan Wright @aidangcw.bsky.social · 24/10/2025
Interesting new special issue in Psychological Assessment. Edited by Kristin Naragon-Gainey and @kstanton.bsky.social Here's their overview paper: psycnet.apa.org/record/2026-... And here's our contribution, which will win us no friends: psycnet.apa.org/record/2026-...
24116
Reposted by Siwei Liu
Karoline Huth @karolinehuth.bsky.social · 13/10/2025
Happy to share that our large-scale network analysis is now out in @nathumbehav.nature.com We show that networks are often supported by too little evidence from the data for results to be reported with confidence, not meaning that results are flawed but rather suggests caution in interpretation.
073
Reposted by Siwei Liu
Whitney Ringwald @whitneyringwald.bsky.social · 14/10/2025
Great study! A general implication is that when we infer effects of retrospectively measure variables on outcomes, we’re largely just seeing the effects of how people are currently feeling.
1299
Reposted by Siwei Liu
Julia M. Rohrer @dingdingpeng.the100.ci · 11/09/2025
New paper out with @boryslaw.bsky.social 🥳 In which we sketch out how to rethink measurement invariance causally for applied researchers. And provide a causal definition of measurement invariance! www.sciencedirect.com/science/arti...
Rethinking measurement invariance causally

Highlights:
It is preferable to work with a causal definition of measurement invariance
A violation of measurement invariance is a potentially substantively interesting observation
Standard tests for measurement invariance rely on strong assumptions
Group differences can be thought of as descriptive resultsConceptual graph illustration the central points of the manuscript. A group variable is potentiall connected to a construct of interest which affects items. Measurement invariance is violated if the group variable directly affects the items, for example by modifying the loadings from the construct to the items, or by directly affecting an itemTo make this less abstract, consider a scenario where students take an exam, R, meant to capture some ability, T, and then are admitted to a program, V, depending on their exam results: R → V. This is sufficient to result in a violation of the statistical definition of measurement invariance. Exam results and admission are not independent given ability because exam results have a direct effect on admission. Even if we know somebody’s ability (e.g., we know it’s very high), learning about their admission status (e.g., they were not admitted) can tell us something about their exam result (e.g., it may have been worse than expected). According to the causal definition, this in itself does not constitute measurement bias, which seems a sensible conclusion here. After all, the scenario does not involve any reason to believe that the measurement process varied systematically by admission status. Admission happens after the exams took place, it cannot retroactively influence the measurement process (and, for example, lead to unfair treatment depending on admission status).
311336
Reposted by Siwei Liu
Dan McNeish @dmcneish.bsky.social · 03/09/2025
Tenure-Track Quant Psyc job opening at Northern Arizona University in Flagstaff. Areas of interest are pretty broad (SEM, multilevel, or psychometrics), the deadline to apply is coming up soon (Sept 15) if you're interested! careers.nau.edu/jobs/assista...
careers.nau.edu
Assistant Professor, Psychological Sciences - Flagstaff, Arizona, United States
About the Department/College The Department of Psychological Sciences is located on the Flagstaff Mountain Campus of Northern Arizona University (NAU), situated at the base of San Francisco Peaks. NAU...
01515
Reposted by Siwei Liu
Association for Psychological Science @psychscience.bsky.social · 05/08/2025
AMPPS Call for Papers: Replicability and Reproducibility in Methodological Research. Proposals due September 15. @jkflake.bsky.social 
psychologicalscience.org
11414
Siwei Liu @siweiliu.bsky.social · 27/06/2025
Great post! I just read this paper by @drewhalbailey.bsky.social and colleagues that shows the RI-CLPM also performs better than CLPM when there are unmeasured time-varying confounders: psycnet.apa.org/record/2025-...
psycnet.apa.org
APA PsycNet
072
Siwei Liu @siweiliu.bsky.social · 12/06/2025
This work was officially accepted for publication today!
031
Siwei Liu @siweiliu.bsky.social · 12/05/2025
Love it!
110
Reposted by Siwei Liu
JAMA @jama.com · 13/02/2025
🧵 US states that implemented abortion bans saw higher than expected infant mortality rates, with larger increases among Black infants and those in southern states, according to this analysis of US national vital statistics data from 2012–2023. ja.ma/4aVchPn #MedSky
Figure 1.  Trends in Biannual US Infant Mortality Rates, 2012-2023
11340247
Reposted by Siwei Liu
Karoline Huth @karolinehuth.bsky.social · 24/01/2025
Are psychometric networks sufficiently supported by data such that one can be confident when interpreting its results? We analysed 294 psychometric networks from 126 papers with the Bayesian approach to address this question @jmbh.bsky.social Sara Ruth van Holst @maartenmarsman.bsky.social 🧵
15116
Reposted by Siwei Liu
Andrew Gelman et al. @statmodeling.bsky.social · 17/01/2025
7 steps to junk science that can achieve worldly success statmodeling.stat.columbia.edu/2025/01/17/7...
statmodeling.stat.columbia.edu
7 steps to junk science that can achieve worldly success | Statistical Modeling, Causal Inference, and Social Science
03011
Siwei Liu @siweiliu.bsky.social · 17/01/2025
It’s fascinating to watch the exchanges between “TikTok refugees” and Chinese netizens on Rednote (Xiaohongshu)! Never imagined the “wall” would start to collapse in this way. Now I just worry that Rednote will get banned here if it becomes too popular😕
020
Reposted by Siwei Liu
Madhu Pai, MD, PhD @madhupai.bsky.social · 24/11/2024
Non-native English speakers need 50% more time to write a paper When they do, they face a 2.5 times higher chance of being rejected because of language journals.plos.org/plosbiology/...
24642290
Reposted by Siwei Liu
Aidan Wright @aidangcw.bsky.social · 16/12/2024
Wow. I’ve expressed concerns about Frontiers for a long time and won’t submit or review for them, but this suggests things are really bad.
05624
Reposted by Siwei Liu
Julia Strand @juliafstrand.bsky.social · 11/12/2024
Hi all! I'm looking for a short, accessible reading for 1st year UGs that covers: 1) contributors to the replication crisis(e.g., p-hacking, publication bias, researcher degrees of freedom) 2) initiatives to address it (e.g., preregistration, sharing data and code, registered reports). Any tips?
93512
Reposted by Siwei Liu
Kristoffer Magnusson @rpsychologist.com · 11/12/2024
Introducing PowerLMM.js! A new tool for power analysis of longitudinal linear mixed-effects models (LMMs) – with support for missing data, plus non-inferiority and equivalence tests. powerlmmjs.rpsychologist.com Would really appreciate your feedback as I refine this app! Details below 🧵👇
11299110
Reposted by Siwei Liu
Mijke Rhemtulla @mijke.bsky.social · 06/12/2024
West-coast (ish) Quant-Psych(ometric) friends! Ben Domingue and I are organizing a small conference to be held in Davis in June. Please apply to attend, we're going to have so much fun. docs.google.com/document/d/1...
docs.google.com
2025 PQPC RFA
Request for Applications 2025 Pacific Quant Psych Conf (PQPC) June 26-27 2025 UC Davis Center for Mind and Brain in Davis, CA We would like to build a community of researchers on the west coast (and...
094
Siwei Liu @siweiliu.bsky.social · 05/12/2024
I am considering switching from SAS to R in my graduate-level multilevel longitudinal data analysis class. Pro: R is free! Con: R is less flexible in terms of specifying the residual covariance matrix. Anything else I need to be aware of?
210
Siwei Liu @siweiliu.bsky.social · 26/11/2024
New work by my lab members Sebastian Castro-Alvarez and Di Jody Zhou, in collaboration with @eikofried.bsky.social @bringmannlaura.bsky.social and others.
062