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Siwei Liu @siweiliu.bsky.social · 23d

Wow, congrats!

Reposted by Siwei Liu

Julia M. Rohrer @dingdingpeng.the100.ci · 29d

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 results

Conceptual 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 item

To 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).

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Reposted by Siwei Liu

Dan McNeish @dmcneish.bsky.social · Sep 3

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...

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...

careers.nau.edu

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Reposted by Siwei Liu

Association for Psychological Science @psychscience.bsky.social · Aug 5

AMPPS Call for Papers: Replicability and Reproducibility in Methodological Research. Proposals due September 15. @jkflake.bsky.social

www.psychologicalscience.org

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Siwei Liu @siweiliu.bsky.social · Jul 2

Please add me.

Siwei Liu @siweiliu.bsky.social · Jun 27

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-...

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Siwei Liu @siweiliu.bsky.social · Jun 12

This work was officially accepted for publication today!

Siwei Liu @siweiliu.bsky.social · Nov 26

New work by my lab members Sebastian Castro-Alvarez and Di Jody Zhou, in collaboration with @eikofried.bsky.social @bringmannlaura.bsky.social and others.

Eiko Fried @eikofried.bsky.social · Nov 1

1/2

Our new preprint shows how to estimate internal consistency reliability in EMA data:

➡️n~1150, 3 months data, 4 scales
➡️6 nomothetic & idiographic methods
➡️2 timescales (4/day & 1/week)
➡️2 languages (ENG vs NL)
➡️separation of between & within person reliability.

#psychscisky #stats

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Siwei Liu @siweiliu.bsky.social · Jun 4

This is a required reading in my Intro to Research Methods class.

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Siwei Liu @siweiliu.bsky.social · May 12

Love it!

Julia M. Rohrer @dingdingpeng.the100.ci · May 11

Thanks to everybody who chimed in!

I arrived at the conclusion that (1) there's a lot of interesting stuff about interactions and (2) the figure I was looking for does not exist.

So, I made it myself! Here's a simple illustration of how to control for confounding in interactions:>

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Reposted by Siwei Liu

JAMA @jama.com · Feb 13

🧵 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

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Siwei Liu @siweiliu.bsky.social · Feb 15

😭

Reposted by Siwei Liu

Karoline Huth @karolinehuth.bsky.social · Jan 24

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 🧵

PsyArXivBot @psyarxivbot.bsky.social · Jan 16

Statistical Evidence in Psychological Networks: A Bayesian Analysis of 294 Networks from 126 Studies: http://osf.io/62ydg/

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Siwei Liu @siweiliu.bsky.social · Jan 23

I don’t know if it’s an addition, but drinking too much milk tea (aka bubble tea, which is not just milk and tea but usually high in sugar) is a common problem in Chinese teenagers and a legitimate public health concern. It’s the same problem that Americans have with soda.

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Reposted by Siwei Liu

Andrew Gelman et al. @statmodeling.bsky.social · Jan 17

7 steps to junk science that can achieve worldly success
statmodeling.stat.columbia.edu/2025/01/17/7...

7 steps to junk science that can achieve worldly success | Statistical Modeling, Causal Inference, and Social Science

statmodeling.stat.columbia.edu

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Siwei Liu @siweiliu.bsky.social · Jan 17

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😕

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Siwei Liu @siweiliu.bsky.social · Jan 15

@dmcneish.bsky.social has a recent paper on this topic in which he uses a data set on binge eating behavior. It’s published in Psychological Methods.

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Reposted by Siwei Liu

Madhu Pai, MD, PhD @madhupai.bsky.social · Nov 24

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/...

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Reposted by Siwei Liu

Aidan Wright @aidangcw.bsky.social · Dec 16

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.

Tanja Pyhäjärvi @pyhatanja.bsky.social · Dec 16

Big news from Finnish publication forum. Almost all MDPI and Frontiers journals will be downgraded to level 0 and thus are not considered as properly peer reviewed trustworthy scientific journals.
julkaisufoorumi.fi/en/news/chan...

Changes to the classification

julkaisufoorumi.fi

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Siwei Liu @siweiliu.bsky.social · Dec 16

Congratulations!

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Reposted by Siwei Liu

Julia Strand @juliafstrand.bsky.social · Dec 11

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?

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Reposted by Siwei Liu

Kristoffer Magnusson @rpsychologist.com · Dec 11

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 🧵👇

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Reposted by Siwei Liu

Mijke Rhemtulla @mijke.bsky.social · Dec 6

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...

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...

docs.google.com

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Siwei Liu @siweiliu.bsky.social · Dec 6

😅