Timo Gnambs
@tgnambs.bsky.social
Head of Educational Measurement at LIfBi Bamberg Germany #psychology #psychometrics #assessment #metaanalysis #LSA #stats
Reposted by Timo Gnambs
1/9 New blog is live! This is part 2 of a series—last time we looked at the Dunning-Kruger effect, now we are digging in to Implicit vs Explicit attitudes and the Implicit Association Test. To start, of course we need a good meme...
haines-lab.com/post/part-2-...
haines-lab.com/post/part-2-...
January 26, 2026 at 5:45 PM
1/9 New blog is live! This is part 2 of a series—last time we looked at the Dunning-Kruger effect, now we are digging in to Implicit vs Explicit attitudes and the Implicit Association Test. To start, of course we need a good meme...
haines-lab.com/post/part-2-...
haines-lab.com/post/part-2-...
Reposted by Timo Gnambs
I genuinely had no idea #rstats technically has a module system.
my_module <- new.env()
source("helpers.R", local = my_module)
my_module$add(1, 2)
my_module <- new.env()
source("helpers.R", local = my_module)
my_module$add(1, 2)
January 25, 2026 at 11:26 AM
I genuinely had no idea #rstats technically has a module system.
my_module <- new.env()
source("helpers.R", local = my_module)
my_module$add(1, 2)
my_module <- new.env()
source("helpers.R", local = my_module)
my_module$add(1, 2)
Reposted by Timo Gnambs
"in particular mice methods tend to have the best performance. Despite their growing popularity, deep learning-based joint imputation methods, such as miwae, gain, miracle, and remasker consistently underperformed in our analysis." #statistics #statsky #academicsky #skystats
The image below comes from a recent paper by Grzesiak et al. (2025). For more details and additional results across different data settings, see: arxiv.org/pdf/2511.04833
Dive deeper in my course: statisticsglobe.com/online-cours...
#rstats #statistics #missingdata #datascience
Dive deeper in my course: statisticsglobe.com/online-cours...
#rstats #statistics #missingdata #datascience
January 23, 2026 at 2:54 PM
"in particular mice methods tend to have the best performance. Despite their growing popularity, deep learning-based joint imputation methods, such as miwae, gain, miracle, and remasker consistently underperformed in our analysis." #statistics #statsky #academicsky #skystats
Reposted by Timo Gnambs
Excited to share a new call for papers for a special issue in Psychometrika focused on Data Intensive Methods in Psychometrics that I'll be guest editing with @kyliegorney.bsky.social, @jmbh.bsky.social, @leonievogelsmeier.bsky.social, and Ben Domingue: www.psychometricsociety.org/post/call-sp...
Call for Papers: Psychometrika Special Issue - Psychometric Society
Data Intensive Methods in Psychometrics
www.psychometricsociety.org
January 15, 2026 at 4:08 PM
Excited to share a new call for papers for a special issue in Psychometrika focused on Data Intensive Methods in Psychometrics that I'll be guest editing with @kyliegorney.bsky.social, @jmbh.bsky.social, @leonievogelsmeier.bsky.social, and Ben Domingue: www.psychometricsociety.org/post/call-sp...
Reposted by Timo Gnambs
For this week's #TidyTuesday, I visualized James Bond's drinking habits across the 12 novels using a waffle chart, based on the 2013 study "Were James Bond's drinks shaken because of alcohol induced tremor?"
Code: github.com/gkaramanis/t...
#RStats #dataviz
Code: github.com/gkaramanis/t...
#RStats #dataviz
January 11, 2026 at 3:25 PM
For this week's #TidyTuesday, I visualized James Bond's drinking habits across the 12 novels using a waffle chart, based on the 2013 study "Were James Bond's drinks shaken because of alcohol induced tremor?"
Code: github.com/gkaramanis/t...
#RStats #dataviz
Code: github.com/gkaramanis/t...
#RStats #dataviz
Reposted by Timo Gnambs
#OpenScience #ResearchIntegrity #AcademicPublishing
Preprint:
Nießen, D., Poppa, C., Daikeler, J., Silber, H., Weiß, B., & Richter, D. (2025). Actor-driven risk factors of publication bias: Opening the file drawer of two probabilistic panel surveys. PsyArXiv.
doi.org/10.31234/osf...
Preprint:
Nießen, D., Poppa, C., Daikeler, J., Silber, H., Weiß, B., & Richter, D. (2025). Actor-driven risk factors of publication bias: Opening the file drawer of two probabilistic panel surveys. PsyArXiv.
doi.org/10.31234/osf...
January 2, 2026 at 8:00 AM
#OpenScience #ResearchIntegrity #AcademicPublishing
Preprint:
Nießen, D., Poppa, C., Daikeler, J., Silber, H., Weiß, B., & Richter, D. (2025). Actor-driven risk factors of publication bias: Opening the file drawer of two probabilistic panel surveys. PsyArXiv.
doi.org/10.31234/osf...
Preprint:
Nießen, D., Poppa, C., Daikeler, J., Silber, H., Weiß, B., & Richter, D. (2025). Actor-driven risk factors of publication bias: Opening the file drawer of two probabilistic panel surveys. PsyArXiv.
doi.org/10.31234/osf...
Reposted by Timo Gnambs
Reminder>> Comparing Video-Based and Face-to-Face #Psychotherapy: A Systematic Review and Multi-Level Meta-Analysis across Mental Disorders (preprint) #openscience #PeerReviewMe #PlanP
Comparing Video-Based and Face-to-Face #Psychotherapy: A Systematic Review and Multi-Level Meta-Analysis across Mental Disorders
Date Submitted: Dec 9, 2025.
Open Peer Review Period: Dec 9, 2025 - Feb 3, 2026.
dlvr.it
December 13, 2025 at 2:34 PM
Reminder>> Comparing Video-Based and Face-to-Face #Psychotherapy: A Systematic Review and Multi-Level Meta-Analysis across Mental Disorders (preprint) #openscience #PeerReviewMe #PlanP
Reposted by Timo Gnambs
“104 meta-analyses (86%) were fully reproducible, seven (6%) were not fully reproducible, and 10 (8%) had insufficient data available to attempt reproduction. ”
bmjmedicine.bmj.com/content/4/1/...
bmjmedicine.bmj.com/content/4/1/...
Reproducibility of meta-analytic results in systematic reviews of interventions: meta-research study
Objective To determine how often meta-analyses of effects of interventions are reproducible.Design Meta-research study.Setting Systematic reviews with meta-analyses of the effects of health, social, b...
bmjmedicine.bmj.com
December 6, 2025 at 1:34 PM
“104 meta-analyses (86%) were fully reproducible, seven (6%) were not fully reproducible, and 10 (8%) had insufficient data available to attempt reproduction. ”
bmjmedicine.bmj.com/content/4/1/...
bmjmedicine.bmj.com/content/4/1/...
Reposted by Timo Gnambs
Got a great paper on how AI is reshaping public opinion research? Submit it to POQ's special issue on Artificial Intelligence and the Future of Survey Research!
Papers are being reviewed and accepted on a rolling basis starting now – full details here: s3-us-west-2.amazonaws.com/clarivate-sc...
Papers are being reviewed and accepted on a rolling basis starting now – full details here: s3-us-west-2.amazonaws.com/clarivate-sc...
December 3, 2025 at 6:16 PM
Got a great paper on how AI is reshaping public opinion research? Submit it to POQ's special issue on Artificial Intelligence and the Future of Survey Research!
Papers are being reviewed and accepted on a rolling basis starting now – full details here: s3-us-west-2.amazonaws.com/clarivate-sc...
Papers are being reviewed and accepted on a rolling basis starting now – full details here: s3-us-west-2.amazonaws.com/clarivate-sc...
Reposted by Timo Gnambs
Hidden variables in your data? 🕵️♀️
Find them in @tgnambs.bsky.social’s #GESISworkshop on structural equation modeling!
Build a solid #SEM foundation — from measurement models to mediation, moderation, invariance, and longitudinal SEMs, hands-on in R with #lavaan.
Info ➡️ t1p.de/Intro-SEM26
Find them in @tgnambs.bsky.social’s #GESISworkshop on structural equation modeling!
Build a solid #SEM foundation — from measurement models to mediation, moderation, invariance, and longitudinal SEMs, hands-on in R with #lavaan.
Info ➡️ t1p.de/Intro-SEM26
December 3, 2025 at 2:11 PM
Hidden variables in your data? 🕵️♀️
Find them in @tgnambs.bsky.social’s #GESISworkshop on structural equation modeling!
Build a solid #SEM foundation — from measurement models to mediation, moderation, invariance, and longitudinal SEMs, hands-on in R with #lavaan.
Info ➡️ t1p.de/Intro-SEM26
Find them in @tgnambs.bsky.social’s #GESISworkshop on structural equation modeling!
Build a solid #SEM foundation — from measurement models to mediation, moderation, invariance, and longitudinal SEMs, hands-on in R with #lavaan.
Info ➡️ t1p.de/Intro-SEM26
Reposted by Timo Gnambs
*Introduction to Structural Equation Modeling* by @tgnambs.bsky.social
🗓️ 04 – 06 March 2026
🏢 Online
🌐 t1p.de/Intro-SEM26
🗓️ 04 – 06 March 2026
🏢 Online
🌐 t1p.de/Intro-SEM26
December 3, 2025 at 12:09 PM
*Introduction to Structural Equation Modeling* by @tgnambs.bsky.social
🗓️ 04 – 06 March 2026
🏢 Online
🌐 t1p.de/Intro-SEM26
🗓️ 04 – 06 March 2026
🏢 Online
🌐 t1p.de/Intro-SEM26
Reposted by Timo Gnambs
Needed - larger samples, more realism about (the lack of) heterogeneous treatment effects:
-"less than a third of proposed hypotheses were supported... the largest predictor of positive exp. results was sample size"
-"moderation hypotheses were rarely significant"
academic.oup.com/poq/advance-...
-"less than a third of proposed hypotheses were supported... the largest predictor of positive exp. results was sample size"
-"moderation hypotheses were rarely significant"
academic.oup.com/poq/advance-...
An Audit of Social Science Survey Experiments
Abstract. Survey experiments have become a popular methodology for causal inference across the social sciences. We study the efficacy of survey experiment
academic.oup.com
November 30, 2025 at 3:16 PM
Needed - larger samples, more realism about (the lack of) heterogeneous treatment effects:
-"less than a third of proposed hypotheses were supported... the largest predictor of positive exp. results was sample size"
-"moderation hypotheses were rarely significant"
academic.oup.com/poq/advance-...
-"less than a third of proposed hypotheses were supported... the largest predictor of positive exp. results was sample size"
-"moderation hypotheses were rarely significant"
academic.oup.com/poq/advance-...
Reposted by Timo Gnambs
New chart from Mike Males using MTF and Pew Research data finds that trends in teen social media and smartphone use are unrelated to teen loneliness (which hasn't changed much over the years anyway aside from an unexplained dip in the 2000s).
November 21, 2025 at 10:16 PM
New chart from Mike Males using MTF and Pew Research data finds that trends in teen social media and smartphone use are unrelated to teen loneliness (which hasn't changed much over the years anyway aside from an unexplained dip in the 2000s).
Reposted by Timo Gnambs
new paper by Sean Westwood:
With current technology, it is impossible to tell whether survey respondents are real or bots. Among other things, makes it easy for bad actors to manipulate outcomes. No good news here for the future of online-based survey research
With current technology, it is impossible to tell whether survey respondents are real or bots. Among other things, makes it easy for bad actors to manipulate outcomes. No good news here for the future of online-based survey research
November 18, 2025 at 7:16 PM
new paper by Sean Westwood:
With current technology, it is impossible to tell whether survey respondents are real or bots. Among other things, makes it easy for bad actors to manipulate outcomes. No good news here for the future of online-based survey research
With current technology, it is impossible to tell whether survey respondents are real or bots. Among other things, makes it easy for bad actors to manipulate outcomes. No good news here for the future of online-based survey research
Reposted by Timo Gnambs
Announcement: I am excited to be co-editing (with Li Cai) an upcoming Special Issue of the Journal of Mathematical Psychology on "Advances in Statistical Model Evaluation." Proposals due Feb 1. Details: www.sciencedirect.com/special-issu...
Please repost!
#quantpsych #mathpsych #philsci #statsky
Please repost!
#quantpsych #mathpsych #philsci #statsky
November 18, 2025 at 6:18 PM
Announcement: I am excited to be co-editing (with Li Cai) an upcoming Special Issue of the Journal of Mathematical Psychology on "Advances in Statistical Model Evaluation." Proposals due Feb 1. Details: www.sciencedirect.com/special-issu...
Please repost!
#quantpsych #mathpsych #philsci #statsky
Please repost!
#quantpsych #mathpsych #philsci #statsky
Reposted by Timo Gnambs
Mittwoch! Wir sprechen diese Woche über die Geschwister Sigmund Freuds, und deren systematische Entrechtung durch das NS-Regime.
https://www.geschichte.fm/archiv/gag529/
https://www.geschichte.fm/archiv/gag529/
GAG529: Das Schicksal der Geschwister Freud - Geschichten aus der Geschichte
Eine Geschichte über die Geschwister Sigmund Freuds und ihre Entrechtung durch das NS-Regime
www.geschichte.fm
November 12, 2025 at 9:28 AM
Mittwoch! Wir sprechen diese Woche über die Geschwister Sigmund Freuds, und deren systematische Entrechtung durch das NS-Regime.
https://www.geschichte.fm/archiv/gag529/
https://www.geschichte.fm/archiv/gag529/
Reposted by Timo Gnambs
You don't want to miss the next @srma-sig.bsky.social webinar on "A meta-review on the methodological quality of education intervention meta-analyses" featuring work by #MartaPellegrini, @terripigott.bsky.social and colleagues!
@aeraedresearch.bsky.social #MetaAnalysis #SystematicReview
@aeraedresearch.bsky.social #MetaAnalysis #SystematicReview
November 13, 2025 at 11:48 PM
You don't want to miss the next @srma-sig.bsky.social webinar on "A meta-review on the methodological quality of education intervention meta-analyses" featuring work by #MartaPellegrini, @terripigott.bsky.social and colleagues!
@aeraedresearch.bsky.social #MetaAnalysis #SystematicReview
@aeraedresearch.bsky.social #MetaAnalysis #SystematicReview
🌍 Call for papers: Educational Datasets for Psychological Research
🗓️ Deadline: June 30, 2026
🔗 More information: openpsychologydata.metajnl.com
The editorial team including Debora Maehler, @uschroeders.bsky.social , Kati Mozygemba, and myself look forward to your submission!
🗓️ Deadline: June 30, 2026
🔗 More information: openpsychologydata.metajnl.com
The editorial team including Debora Maehler, @uschroeders.bsky.social , Kati Mozygemba, and myself look forward to your submission!
Journal of Open Psychology Data
openpsychologydata.metajnl.com
November 13, 2025 at 11:11 AM
🌍 Call for papers: Educational Datasets for Psychological Research
🗓️ Deadline: June 30, 2026
🔗 More information: openpsychologydata.metajnl.com
The editorial team including Debora Maehler, @uschroeders.bsky.social , Kati Mozygemba, and myself look forward to your submission!
🗓️ Deadline: June 30, 2026
🔗 More information: openpsychologydata.metajnl.com
The editorial team including Debora Maehler, @uschroeders.bsky.social , Kati Mozygemba, and myself look forward to your submission!
Reposted by Timo Gnambs
Y'all. N>3,800. !!!!!!!
Goodness gracious.
Goodness gracious.
When do interaction/moderation effects stabilize in linear regression?: https://osf.io/35t84
November 12, 2025 at 10:49 PM
Y'all. N>3,800. !!!!!!!
Goodness gracious.
Goodness gracious.
💡 How do people in Germany perceive Artificial Intelligence (AI)?
In our recent population survey in Germany, we examined attitudes, experiences, and usage intentions regarding AI in work, healthcare, and education.
🔗 Read the full open-access article here:
www.sciencedirect.com/science/arti...
In our recent population survey in Germany, we examined attitudes, experiences, and usage intentions regarding AI in work, healthcare, and education.
🔗 Read the full open-access article here:
www.sciencedirect.com/science/arti...
Attitudes, experiences, and usage intentions of artificial intelligence: A population study in Germany
Artificial intelligence (AI) increasingly affects individuals’ private and professional lives. Importantly, both the acceptance and adoption of new AI…
www.sciencedirect.com
November 12, 2025 at 7:29 AM
💡 How do people in Germany perceive Artificial Intelligence (AI)?
In our recent population survey in Germany, we examined attitudes, experiences, and usage intentions regarding AI in work, healthcare, and education.
🔗 Read the full open-access article here:
www.sciencedirect.com/science/arti...
In our recent population survey in Germany, we examined attitudes, experiences, and usage intentions regarding AI in work, healthcare, and education.
🔗 Read the full open-access article here:
www.sciencedirect.com/science/arti...
Reposted by Timo Gnambs
Reposted by Timo Gnambs
Eigene Studien mit Teilnehmenden des #NEPS durchführen?
Der Call NEPS Add-on bietet Forschenden jetzt die Möglichkeit, Fragen in Teilstudien des #NEPS einzubringen oder Zusatzstudien durchzuführen und mit bestehenden NEPS-Daten verknüpfen zu lassen.
👉 Alle Infos dazu: www.lifbi.de/de-de/Start/...
Der Call NEPS Add-on bietet Forschenden jetzt die Möglichkeit, Fragen in Teilstudien des #NEPS einzubringen oder Zusatzstudien durchzuführen und mit bestehenden NEPS-Daten verknüpfen zu lassen.
👉 Alle Infos dazu: www.lifbi.de/de-de/Start/...
November 4, 2025 at 10:30 AM
Eigene Studien mit Teilnehmenden des #NEPS durchführen?
Der Call NEPS Add-on bietet Forschenden jetzt die Möglichkeit, Fragen in Teilstudien des #NEPS einzubringen oder Zusatzstudien durchzuführen und mit bestehenden NEPS-Daten verknüpfen zu lassen.
👉 Alle Infos dazu: www.lifbi.de/de-de/Start/...
Der Call NEPS Add-on bietet Forschenden jetzt die Möglichkeit, Fragen in Teilstudien des #NEPS einzubringen oder Zusatzstudien durchzuführen und mit bestehenden NEPS-Daten verknüpfen zu lassen.
👉 Alle Infos dazu: www.lifbi.de/de-de/Start/...
Reposted by Timo Gnambs
"only about 5% of the variance in personality can be
predicted from digital footprints, and personality‐tailored messages show negligible effects on behavior... When design and evaluation flaws are controlled, the combined end‐to‐end effectiveness of psychological targeting approaches zero."
predicted from digital footprints, and personality‐tailored messages show negligible effects on behavior... When design and evaluation flaws are controlled, the combined end‐to‐end effectiveness of psychological targeting approaches zero."
The (In)Effectiveness of Psychological Targeting: A Meta‐Analytic Review
The use of psychological targeting—employing machine learning to predict consumer personality from digital footprints and subsequently tailoring persuasive messages—has emerged as a controversial yet...
onlinelibrary.wiley.com
October 31, 2025 at 2:55 PM
"only about 5% of the variance in personality can be
predicted from digital footprints, and personality‐tailored messages show negligible effects on behavior... When design and evaluation flaws are controlled, the combined end‐to‐end effectiveness of psychological targeting approaches zero."
predicted from digital footprints, and personality‐tailored messages show negligible effects on behavior... When design and evaluation flaws are controlled, the combined end‐to‐end effectiveness of psychological targeting approaches zero."
Including students with special educational needs (SEN) in educational large-scale assessements is an ongoing challenge. Several feasibility studies in the NEPS were conducted that have examined the psychometric quality and comparability of cognitve assessments administered to students with SEN.
👇
👇
October 30, 2025 at 7:48 AM
Including students with special educational needs (SEN) in educational large-scale assessements is an ongoing challenge. Several feasibility studies in the NEPS were conducted that have examined the psychometric quality and comparability of cognitve assessments administered to students with SEN.
👇
👇