Julia Haaf
@juliaha.bsky.social
770 followers 340 following 220 posts
Professor of Psych Methods, Evaluation and Statistics at the University of Potsdam. Bayesian modeling, experimental psychology, and cats. But mainly cats. She/her.
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juliaha.bsky.social
Sometimes my cat sounds like someone forgot to turn off the vibration alarm on their phone...
Frank the cat covered by a yellow blanket. He looks cozy but a little concerned.
Reposted by Julia Haaf
candicemorey.bsky.social
Call for collaborators! 🧵

The TL;DR: we seek collaborators on a #ManyLabs #RegisteredReport about what causes rapid forgetting.

In-principle accepted Stage 1: osf.io/ahjn5

Expressions of interest: cardiffunipsych.eu.qualtrics.com/jfe/form/SV_...

Further details in the 🧵:
juliaha.bsky.social
It is a common theme in academia to forget that faculty also get paid to do research and write papers. Getting paid doesn't mean no intellectual contribution to a paper, otherwise unpaid interns would be the only authors on papers.
Reposted by Julia Haaf
szymanikjakub.bsky.social
Join our interdisciplinary team that combines computational linguistics with cognitive neuroscience! Our center is located in the beautiful Trentino region.
cimecunitrento.bsky.social
#CallforExpressionofInterest
Tenure-Track Assistant Professor in Computational Linguistics at the CLIC Lab, @cimecunitrento.bsky.social

📅Deadline: September 14, 2025
📍 Rovereto, Italy
🔗More info: shorturl.at/EnvLy

@szymanikjakub.bsky.social
juliaha.bsky.social
Is that what they call a life hack?
juliaha.bsky.social
Why is it that everyone on the internet seems to be so damn comfortable with prior/posterior plots using ggplot that do not use the same y-axis density values. Drives me nuts. Sunday rant over.
Reposted by Julia Haaf
jkflake.bsky.social
Help us show there is support for offering registered reports at one of Psychology's leading method's journal! chng.it/TwwnVBScVb
Adopt Registered Reports at Psychological Methods
Can you spare a minute to help this campaign?
chng.it
Reposted by Julia Haaf
jacasiegel.bsky.social
Three of my collaborators have COVID RIGHT NOW 😷 😷 😷
adrs.bsky.social
I will die on this hill:

it isn’t hard to say “at the height of the pandemic” or “at the start of COVID” during a podcast interview. Producers, hosts, don’t let your guests say “during COVID” like this thing is over. Correct them. Ask them to say the sentence again. This is your job.
juliaha.bsky.social
Exactly. Still his favorite shoes!
juliaha.bsky.social
My kid came home recently and told me he is wearing girls shoes. I countered with examples of different kids he really likes or admires and who wear all kinds of different types of shoes. So there can't be boys and girls shoes. He accepted it and now they are his princess shoes. 👸
Reposted by Julia Haaf
tamaranopper.bsky.social
A lot of educators treat being overworked as a sign of virtue or commitment to excellence. It might just be a sign our institutions are understaffed, underfunded, and don't prioritize teaching, teachers, and learning in their budgets. And self-congratulation doesn't pay the bills.
Reposted by Julia Haaf
seymaertekin.bsky.social
Do kids show adult-like working memory patterns?

🧠 We analyzed nearly 1M observations from 9K+ Dutch students in a real-world adaptive learning platform.
✅ Benchmark effects in children
📊 Bayesian modeling + big adaptive data = new insights

⬇️ Authors & links

#WorkingMemory #DevPsych
APA PsycNet
psycnet.apa.org
juliaha.bsky.social
Summer is the best!
juliaha.bsky.social
We started writing this paper in 2023 and it is finally preprinted. I have learned *a lot* writing this and I hope you will learn a lot from it as well.
juliaha.bsky.social
But what should be at least equally central to the debate is validity. We highlight that current efforts to ensure validity are often misguided. We propose to use formal cognitive modeling to investigate validity, but also to develop formal models and improved tasks of attentional control together.
juliaha.bsky.social
How can we achieve good measurement of attentional control? Much of the debate around this question has focused on methodological issues, most prominently the reliability paradox. Sure, reliability is important (and we critically review all recent developments).
psyarxivbot.bsky.social
How can we achieve a good measurement of attentional control?: https://osf.io/ugk4h
Reposted by Julia Haaf
improvingpsych.org
PsyArXiv is seeking new moderators to help combat an increase in AI submissions! If you've ever posted a preprint to PsyArXiv, please consider joining. Minimum commitment 1h/month, there's a training session this Monday @ 1pm ET. More info here: forms.gle/9LB1rEtxHAeZ... #PsychSciSky
Expression of Interest in Serving as a PsyArXiv Moderator
As you might have heard, PsyArXiv is having some issues with an increase in low-quality submissions, ranging from AI generated manuscripts to inflate citation metrics, incoherent or nonsensical docume...
forms.gle
Reposted by Julia Haaf
clintin.bsky.social
New paper with @richarddmorey.bsky.social now out in JASA, where we critically examine p-curve. Below is Richard’s excellent summary of the many poor statistical properties of p-curve (with link to paper). I wanted to add some conceptual issues that we also tackle in the paper.
richarddmorey.bsky.social
Paper drop, for anyone interested in #metascience, #statistics, or #metaanalysis! @clintin.bsky.social and I show in a new paper in JASA that the P-curve, a popular forensic meta-analysis method, has deeply undesirable statistical properties. www.tandfonline.com/doi/full/10.... 1/?
Cover page for the manuscript: Morey, R. D., & Davis-Stober, C. P. (2025). On the poor statistical properties of the P-curve meta-analytic procedure. Journal of the American Statistical Association, 1–19. https://doi.org/10.1080/01621459.2025.2544397 Abstract for the paper: The P-curve (Simonsohn, Nelson, & Simmons, 2014; Simonsohn, Simmons, & Nelson, 2015) is a widely-used suite of meta-analytic tests advertised for detecting problems in sets of studies. They are based on nonparametric combinations of p values (e.g., Marden, 1985) across significant (p < .05) studies and are variously claimed to detect “evidential value”, “lack of evidential value”, and “left skew” in p values. We show that these tests do not have the properties ascribed to them. Moreover, they fail basic desiderata for tests, including admissibility and monotonicity. In light of these serious problems, we recommend against the use of the P-curve tests.
juliaha.bsky.social
Here it's free for kids between 3 and 6 (state of Brandenburg). We do pay 40 euros for food per month, and they provide three meals a day for the kids (breakfast lunch and an afternoon snack).
Reposted by Julia Haaf
richarddmorey.bsky.social
Paper drop, for anyone interested in #metascience, #statistics, or #metaanalysis! @clintin.bsky.social and I show in a new paper in JASA that the P-curve, a popular forensic meta-analysis method, has deeply undesirable statistical properties. www.tandfonline.com/doi/full/10.... 1/?
Cover page for the manuscript: Morey, R. D., & Davis-Stober, C. P. (2025). On the poor statistical properties of the P-curve meta-analytic procedure. Journal of the American Statistical Association, 1–19. https://doi.org/10.1080/01621459.2025.2544397 Abstract for the paper: The P-curve (Simonsohn, Nelson, & Simmons, 2014; Simonsohn, Simmons, & Nelson, 2015) is a widely-used suite of meta-analytic tests advertised for detecting problems in sets of studies. They are based on nonparametric combinations of p values (e.g., Marden, 1985) across significant (p < .05) studies and are variously claimed to detect “evidential value”, “lack of evidential value”, and “left skew” in p values. We show that these tests do not have the properties ascribed to them. Moreover, they fail basic desiderata for tests, including admissibility and monotonicity. In light of these serious problems, we recommend against the use of the P-curve tests.
juliaha.bsky.social
Are the scores the same between Fitbit and Garmin?
Reposted by Julia Haaf
marygillis.bsky.social
I have yet to read a single story about men adopting AI at work (without being told) at a higher rate than women that presents it as anything other than men being smart. Not one story about how it implies they're lazier and less ethical.
Because that's not the narrative that's being pushed about AI.