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Henrik Singmann

@singmann.bsky.social
1.2K followers 1.2K following 220 posts

Associate Professor at UCL Experimental Psychology; math psych & cognitive psychology; statistical and cognitive modelling in R; German migrant worker in UK

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Reposted by Henrik Singmann
Kevin O’Neill @kevingoneill.github.io · 17/09/2026
New commentary! Are scientists and laypeople alike under persistent illusions of understanding? Shiffrin, Stigler, & Keil (2026) seem to think so. I argue this isn't the case w/ @sharonchungsl.bsky.social, Adam Harris, @davidlagnado.bsky.social & @singmann.bsky.social: rdcu.be/3swzbgH3ePva
rdcu.be
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Henrik Singmann @singmann.bsky.social · 09/09/2026
A new version of rtdists is now on CRAN: cran.r-project.org/package=rtdi... Big thanks to @kiante.bsky.social who added a new distribution, the racing diffusion model, fixed a number of long-standing bugs, and increased the speed of the diffusion model. All news: cran.r-project.org/web/packages...
cran.r-project.org
rtdists: Response Time Distributions
Provides response time distributions (density/PDF, distribution function/CDF, quantile function, and random generation): (a) Ratcliff diffusion model (Ratcliff &amp; McKoon, 2008, &lt;<a href="https:/...
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Cédric Scherer @cedricscherer.com · 25/08/2026
An exciting extension to the #ggplot2 universe 🍾 I love how Alex has tied the new features to best #dataviz practices, and he even added a coaching option. I’m especially excited about the easy way to place the y-axis title at the top, plus even more shapes that are usable right out of the box 🤘
A scatterplot of iris data with a horizontal ytitle placed at the top of the y axis. In addition, the package allows to add simple annotations.An overview of the available symbols in ggplotplus.
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The R Foundation @r-foundation.bsky.social · 19/08/2026
We invite #RStats users to contribute to a fund dedicated to helping the family of Tomáš Kalibera following his untimely death in April. Find out more and donate here: www.r-project.org/foundation/k...
r-project.org
R: Tomáš Kalibera Family Fund
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Henrik Singmann @singmann.bsky.social · 11/08/2026
Incredibly sad news. The OSF is synonymous with sharing of data, code, and materials in psychology. If a paper does not have an OSF link, the chance of it having data available is very slim. I fear without OSF file sharing we might go back to the times when data was generally not available.
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Gavin Buckingham @drgbuckingham.bsky.social · 21/07/2026
The Cognition Group in the Psychology dept at Exeter are at risk of redundancy because "basic cognitive psychology research does not align with the current priorities of funding bodies" If you think this is overtly wrong and misguided, please sign this open letter docs.google.com/forms/d/e/1F...
docs.google.com
Open Letter in Support of the Cognition Group, University of Exeter
To Executive members of the University of Exeter, including Vice Chancellor Prof. Lisa Roberts, Senior Vice-President and Provost Prof. Dan Charman, Pro Vice Chancellor and Executive Dean Prof. Sallie...
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Ethan @ethanrosenthal.com · 10/07/2026
It’s been 10 years since this post and nothing’s changed 😭 www.ethanrosenthal.com/2016/07/20/l...
ethanrosenthal.com
I'm all about ML, but let's talk about OR | Ethan Rosenthal
You’ve studied machine learning, you’re a dataframe master for massaging data, and you can easily pipe that data through a bunch of machine learning libraries. You go for a job interview at a SAAS com...
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Richard Allen @richjallen.bsky.social · 09/07/2026
Three new lectureship positions available at the School of Psychology, University of Leeds: www.jobs.ac.uk/job/DSE550/l...
jobs.ac.uk
Lecturer (Teaching and Research) in Psychology (Three Posts) at University of Leeds
Discover an exciting academic career path as a Lecturer (Teaching and Research) in Psychology (Three Posts) at jobs.ac.uk. Don't miss out on this job opportunity - apply today!
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Joe Bak-Coleman @jbakcoleman.bsky.social · 05/07/2026
A provocative, perhaps, little blog post on False Discovery Rates in the Social Sciences. They just keep cropping up everywhere in my inbox these days. Let me know what you think! #metascience joebakcoleman.com/blog/2026/FDR/
joebakcoleman.com
The Absurdities and Indignities of False Discovery Rates in Social Science | Joe B. Bak-Coleman
As if multiple comparison corrections weren't complicated enough.
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Henrik Singmann @singmann.bsky.social · 01/07/2026
You love teaching psychology and London? Then we have the perfect position for you: Associate Professor (Teaching), Experimental Psychology, @uclpals.bsky.social. Your role: Develop a flexible portfolio of psychology undergraduate modules for Non-Psychology students www.jobs.ac.uk/job/DSB720/a...
jobs.ac.uk
Associate Professor (Teaching) at UCL
Apply for the Associate Professor (Teaching) role on jobs.ac.uk, the top job board for academic positions in higher education. View details and apply now.
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Charles Margossian @charlesm993.bsky.social · 26/06/2026
📘 With the release of our textbook "Bayesian Workflow" (avehtari.github.io/Bayesian-Wor...), I figured I'd also share the content of my graduate course on the topic at UBC. 🌎 charlesm93.github.io/stat547/ The course contains overlapping and complementary material, homeworks and reading.
avehtari.github.io
Bayesian Workflow book: Website – Bayesian Workflow book
Website for the Bayesian Workflow book by Gelman, Vehtari, McElreath, et al. — case studies, code, and exercises in R and Stan.
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Dr Michele V @micheleveldsman.bsky.social · 25/06/2026
“I have done all of the things that one is supposed to do to earn a tenure-track position. And I have done approximately 85% of them by typing prompts into a large language model and then moderately editing the output.” 🤣🤣🤣 brilliant 👌🏽 open.substack.com/pub/inprepar...
open.substack.com
Opinion: I Was Not Allowed To Type Prompts Into ChatGPT During My Chalk Talk And This Is Discrimination
By Dr. Rachel Simmons, Postdoctoral Fellow, Stanford University
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Kristoffer Magnusson @rpsychologist.com · 25/06/2026
New interactive blog! "Why Adjusted Regression Coefficients Are Less Descriptive Than They Look" rpsychologist.com/descriptive-...
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Frederik Aust @frederikaust.com · 23/06/2026
Have you used Bayes factor to test point-null hypotheses in Hierarchical models and wondered: 1. Bridge sampling (BS) or Savage-Dickey density ratio (SDDR)? 2. If SDDR, which density estimation method? 3. How many MCMC samples? 4. What's the cost-benefit trade-off? This may be of interest to you.
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Henrik Singmann @singmann.bsky.social · 18/06/2026
Super exciting *3-year* postdoc opportunity at Queen Mary University in London. The goal is to use state of the art results from cognitive psychology to develop learning interventions that help individuals with ADHD. If you love basic research and want it to have a real impact, this is for you.
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 17/06/2026
Scientific journal editor here: If you're invited to peer review an article and you can't do it, please just click "no." That tells me "this person can't do it, I should invite someone else." Otherwise the system waits 3 weeks to tell me that you didn't respond and I should invite someone else.
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Henrik Singmann @singmann.bsky.social · 16/06/2026
Finally out in Psychological Review (psycnet.apa.org/doi/10.1037/...), our update to Signal Detection Theory. We show that contrary to the prevailing Gaussian assumption, evidence distributions in recognition memory are likely minimum extreme Gumbel!
Figure 7: Illustration of the Gumbel-min Signal Detection Model
Figure consists of three panels.
Bottom-left panel: The Gumbel-min latent-strength distributions associated with SIGNAL (old) and NOISE (new) items. Top-left panel: The log likelihood ratio (log-LR) for the two latent-strength distributions. Right panel: The receiver operating characteristic function produced by the two latent-strength distributions. pH = hit probabilities; pFA = false-alarm probabilities.
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Ruhi Bhanap @ruhibhanap.bsky.social · 16/06/2026
New Publication Alert! 🚨 Along with @koberauer.bsky.social and @agnesrosner.bsky.social we investigated if eye movements are functional for memory retrieval in an associative recognition task and largely found evidence against it. Read more: link.springer.com/article/10.3... #workingmemory
link.springer.com
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Ricardo Rey-Sáez (β) @ricardoreysaez.bsky.social · 15/06/2026
Finally, our paper is out! Together with @aliciafrancomnez.bsky.social, Javier Revuelta, and @mavadillo.bsky.social, we extend hierarchical factor models for skewed RTs and task validation, now in Psychological Methods: doi.org/10.1037/met0... Let me briefly explain what we did and why it matters!
doi.org
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Gidon Frischkorn @gidon-frischkorn.bsky.social · 09/06/2026
A new #bmm release is available on #CRAN. With this version, #bmm now covers basic response time models. This release contains three new models plus several usability features. Here's what's in it 🧵 venpopov.com/bmm/ #rstats #bayes #openscience
venpopov.com
Easy and Accessible Bayesian Measurement Models Using brms
Fit computational and measurement models using full Bayesian inference. The package provides a simple and accessible interface by translating complex domain-specific models into brms syntax, a powerfu...
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Henrik Singmann @singmann.bsky.social · 10/06/2026
Looks like my summer read has finally arrived. #rstats @mc-stan.org
Picture of the Bayesian Workflow book by Gelman and colleagues
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UCL Div. of Psychology & Language Sciences (PALS) @uclpals.bsky.social · 08/06/2026
Meet Angel Au, UCL PALS alumna, mental health advocate and charity founder. Angel co-founded Overcome, a charity training volunteers to deliver peer-led online mental health support to people around the world. 🔗 Read more of Angel’s story here: www.ucl.ac.uk/about/search...
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Mid terms are November 3rd 2026. Go register voters. @usrbinr.bsky.social · 07/06/2026
loving the new why_any() and when_all() functions #rstats dplyr.tidyverse.org/reference/wh...
dplyr.tidyverse.org
Elementwise any() and all() — when-any-all
These functions are variants of any() and all() that work elementwise across multiple inputs. You can also think of these functions as generalizing | and &amp; to any number of inputs, rather than jus...
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Michael Spicer @michaelspicer.bsky.social · 06/06/2026
Nigel Farage Listens to the News
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London Judgement and Decision Making seminar series @ljdm.bsky.social · 05/06/2026
Next Wednesday (June 10th), this semester's last session, we look forward to Dr @leedewit 's talk on how value divides in beliefs about social conformity and hierarchy drive polarisation (full details: tinyurl.com/ucl-ljdm). In person at UCL IoE or on Zoom. All are welcome!
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The R Foundation @r-foundation.bsky.social · 04/06/2026
John Fox (1947-2025) An obituary of R Foundation member John Fox by Peter Dalgaard. www.r-project.org/doc/obit/joh... #rstats
r-project.org
R: John David Fox (1947-2025)
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London Judgement and Decision Making seminar series @ljdm.bsky.social · 29/05/2026
Next Wednesday (June 3rd) is our second last seminar of the term. We are excited to have Dr @mariaeckstein.bsky.social from Google DeepMind join us to talk about overcoming issues of generalisability in using RL in cognitive tasks (full details tinyurl.com/ucl-ljdm). All are welcome in person!
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Mattan S. Ben-Shachar @mattansb.msbstats.info · 31/05/2026
Psychologists doing clustering be like: #statsmeme
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Pierre-Simon Laplace @learnbayesstats.bsky.social · 27/05/2026
🚨 @rmcelreath.bsky.social @statmodeling.bsky.social & @avehtari.bsky.social are coming on the show mid-June to discuss their new book, Bayesian Workflow! ONE listener gets to bring a real Bayesian problem onto the recording and have the three of them work through it live. Here's how to enter 🧵
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Jacky Alciné @jacky.wtf · 27/05/2026
[Now that's public] I've cancelled my donations to Wikipedia after some of us found out this happened. Again, "benevolent" executives are the fucking problem.
medium.com
Big Tech’s Anti-Labor Playbook Has Come for Wikipedia
TLDR: In ten days last month, the Wikimedia Foundation fired the longtime lead developer of MediaWiki and disbanded the team whose entire…
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Matthew Aldridge @mpaldridge.bsky.social · 18/05/2026
I’ve written more about statistics of the Guardian’s 100 best novels list, including: – Books that just missed out – Two errors in the data (Cather and Camus lost out) – Best novelists – Alternative rankings – Weirdest and least-weird ballots mpaldridge.github.io/blog/guardia...
mpaldridge.github.io
Guardian 100 best novels (stats and errors)
The website of Dr Matthew Aldridge, Lecturer in Statistics at the University of Leeds
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Albert Pinto @70sbachchan.bsky.social · 17/05/2026
daaaamn london
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adam osth @adamosth.bsky.social · 17/04/2026
today, the debut album from my band Snailgun released. it's been a lifelong dream to release an album. what was a great start to the day was getting sent this glowing review of the album by Backseat Mafia: www.backseatmafia.com/album-review...
backseatmafia.com
Album Review: Snailgun unveil their shattering debut ‘Glass Walls’ ahead of live dates.
Naarm/Melbourne band Snailgun have just delivered their debut album ‘Glass Wall’, and it’s a deliciously scabrous affair filled with blistering post punk cathartic noise. The gene…
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Jackie Caplan-Auerbach @geophysichick.bsky.social · 07/05/2026
In light of our recently published @science.org paper about The Tracy Arm landslide, I'm gonna tell a little story about being wrong and how science works. Join me. www.science.org/doi/10.1126/...
science.org
A 481-meter-high landslide-tsunami in a cruise ship–frequented Alaska fjord
Early in the morning of 10 August 2025, a >64 × 106 m3 landslide struck Tracy Arm fjord in Alaska. The landslide was preconditioned by glacial retreat caused by climate change. The resulting 481 m run...
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Edouard Machery @edouardmachery.bsky.social · 09/05/2026
Crowd mind: is there some history about why within subjects designs were the obvious design in 19th century psychology, in particular psychophysics? #histsci #philsci
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Josef Fruehwald @jofrhwld.bsky.social · 08/05/2026
of all course notes I've written up, I think I'm proudest of these about "What is a mean?"
lin611-2024.github.io
What is a mean? – Lin611-2024
Let’s say I gave you these values on a number line:
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Dr Mircea Zloteanu 🌺🌞🍃 @mzloteanu.bsky.social · 08/05/2026
#statstab #528 {afex_plot} Publication Ready Plots for Experimental Designs Thoughts: Plotting your results should be a norm for all articles. #anova #dataviz #plots #plotting #r #rstats #afex singmann.github.io/afex_plot_in...
singmann.github.io
afex_plot: Publication Ready Plots for Experimental Designs
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The R Foundation @r-foundation.bsky.social · 05/05/2026
Today marks 50 years since John Chambers and Rick Becker presented a new project to colleagues at Bell Labs - an interactive environment that became the S language. For more details, see the #RStats blog entry "S at 50": blog.r-project.org/2026/05/05/s...
blog.r-project.org
S at 50 - The R Blog
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Bird account @dialecticbio.bsky.social · 29/04/2026
I implore everyone to read this brilliant book review of Kathryn Paige Harden new book on the genetics of criminality. It cuts right through the bullshit to state plainly what Harden's project really is: eugenics bullshit and grifting lareviewofbooks.org/article/orig...
lareviewofbooks.org
Natural Election | Los Angeles Review of Books
Kathryn Paige Harden’s new book offers a defense of a kind of Scientific Calvinism that converges with the eugenicist ideals of the contemporary Far Right.
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Crystal Lewis @cghlewis.bsky.social · 29/04/2026
Anyone know the history behind this infamous phrase? Who was the first to use it? How did it catch on??
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Andrew Trexler @atrexler.com · 24/04/2026
Thrilled to announce my paper with @dianamejordan.bsky.social & sky-less Trent Ollerenshaw is now published open-access at @apsrjournal.bsky.social. In a (very) large replication & extension, we show that design effects of repeated measure experiments are nonzero but typically small. Thread:
Abstract for "New Evidence and Design Considerations for Repeated Measure Experiments in Survey Research" by Diana Jordan, Trent Ollerenshaw, and Andrew Trexler, published in the American Political Science Review. The abstract text reads: "We re-examine recent influential claims that repeated measure experimental designs offer large precision gains without biasing treatment effect estimates in survey research. We test these claims by experimentally varying the design of six classic political science experiments across three distinct large samples of U.S. adults (total N = 13,163). In contrast to prior evidence, we observe consistent attenuation of treatment effects in repeated measure designs. However, we show in simulations that this average design effect is small enough, and the precision gains large enough, that we recommend repeated measure designs for broad application—though (large-N) post-only designs may be preferable when research priorities include estimating the precise magnitude of a treatment effect. We additionally explore how several design considerations affect the bias-precision trade-off, such as within-subject versus between-groups designs, the relative separation of repeated measures within single surveys, and differences in respondent characteristics across sample types."
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Michael Flynn @flynnpolsci.bsky.social · 13/04/2026
Finally finished up a blog post on estimating Bradley–Terry models using brms. www.m-flynn.com/posts/2025-1...
m-flynn.com
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James Balamuta @coatless.bsky.social · 12/04/2026
RIP Tomáš Kalibera. #rstats lost a huge contributor today. Condolences to his young family. stat.ethz.ch/pipermail/r-...
Screenshot of the announcement by Simon Urbanek regarding Tomáš Kalibera’s untimely passing.

It is with great sadness that we announce the passing of Tomáš Kalibera on 1 April, a valuable member of the R core team for close to 10 years and a good friend, after a short but aggressive illness. Tomáš  brought in fresh perspective and knowledge, enabling him to improve many aspects of R, including performance and reliability. He created many tools aimed at aiding package authors to make their packages more reliable, and was instrumental in modernizing the Windows build of R. He was an active member of CRAN and the R community, providing help to package authors, and he was the most prolific writer on the R core blog. He will be remembered for his profound contributions to R by millions of users. He is survived by his wife and 1 year old son. A full obituary will be posted in due time. 

Respectfully,
Simon Urbanek
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Margot Finn @eicathomefinn.bsky.social · 07/04/2026
'In 2023, UK universities spent a total of £500m on education agents – but there is very little oversight of how these agents operate.' 'Once students got their offers, they were passed on to the visa team, and finally delivered to universities as a fully wrapped, fee-paying package.'
theguardian.com
‘I see it as trafficking’: the brutal reality of life as a foreign student in the UK
The long read: Universities in Britain rely on overseas applicants paying full fees, which has given rise to some unscrupulous recruiters and left many hopefuls and their families deep in debt
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Sholto David @sholtodavid.bsky.social · 05/04/2026
Now that I have finally been paid I made a video about the Dana-Farber legal case from my own perspective: youtu.be/ioRtnMEV46Y
youtu.be
I Sued the Dana-Farber Cancer Institute for Research Fraud and Won $2.6 Million Dollars
YouTube video by Sholto David
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Mattan S. Ben-Shachar @mattansb.msbstats.info · 04/04/2026
Back in 2019, TAing @yoavkessler.bsky.social's ANOVA course, I built #rstats tutorials w/@singmann.bsky.social's {afex} and {emmeans}. I keep referring people to those materials as they basically give a complete overview of the analysis of factorial designs: joint tests, (interaction) contrasts...
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Zurich Cognition Lab @cognition-zurich.bsky.social · 31/03/2026
We have a new PhD position at the University of Zurich to work on visual working memory. For more info see here: www.psychology.uzh.ch/en/areas/nec...
psychology.uzh.ch
Open Positions
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Nathaniel Haines @natehaines.bsky.social · 31/03/2026
Part 2 of my shrinkage estimator series is out! Part 1 covered the univariate case, but now we dive into multivariate shrinkage 🤓 We cover Spearman's classic correlation disattenuation formula, multivariate James-Stein estimators, and hierarchical methods too haines-lab.com/post/how-to-...
haines-lab.com
How to Estimate a Correlation, and What It Means for Science | Computational Psychology
Introduction In Part 1 of this series, we showed that six different methods for estimating individual means—James-Stein, classical true score estimation, empirical Bayes, ridge regression, and hierarc...
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Melissa Barber @mbarber.bsky.social · 30/03/2026
Today, MSF is going public with something we've been fighting behind closed doors for months: Gilead will not sell us their new HIV drug, lenacapavir. The sticking point isn't even price, they just refuse to sell. Open letter linked + explainer 🧵1/ www.doctorswithoutborders.org/latest/gilea...
doctorswithoutborders.org
Gilead refuses to sell groundbreaking HIV prevention drug to MSF
Blocking humanitarian organizations from accessing a medical breakthrough puts vulnerable people across the world in danger.
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