Dr. Julia Haaf
Professor of Psychological Methods, Statistics, and Evaluation, University of Potsdam
Contact | Short CV | Publications | Talks and Workshops | Lab Meetings | Links
Welcome
I am a professor of psychological methods at the University of Potsdam. My research focuses on Bayesian hierarchical modeling of cognitive phenomena such as interference effects (Does everyone Stroop?), recognition memory, and subliminal priming. With these hierarchical models, I aim to better understand individual differences cognitive tasks. Specifically, how much do individuals differ, and how can we disentangle stable, qualitative individual differences and sample noise.
Even though a large part of my research is developing statistical models, I am an experimental psychologist at heart, and I get excited about innovative, bold experimental designs. But I also believe that statistics are important to express and test psychological theory. And that Bayesian statistics are better suited to do so than conventional \(t\)-tests or ANOVA. My work particularly focuses on the usefulness of ordinal constraints in modeling. It seems that ordinal constraints are particularly well suited to capture theoretical predictions in psychology.
Throughout my research, I try to be transparent and provide data, code, and open access to manuscripts I wrote. Click here for a list of publications.
And this is Frank, my cat.
Short CV
03/2024 - current Professor of Psychological Methods, Statistics and Evaluation, University of Potsdam, Germany
03/2020 – 02/2024 Assistant Professor, Psychological Methods, University of Amsterdam, the Netherlands
12/2018 – 02/2020 Postdoctoral Scholar working with EJ Wagenmakers, Psychological Methods, University of Amsterdam, the Netherlands
12/2018 PhD in Quantitative Psychology working with Jeff Rouder, Department of Psychological Sciences, University of Missouri, USA
08/2014 MSc Psychology, research track, working with Christoph Stahl, Department of Psychology, University of Cologne, Germany
⇡ up
Talks
Upcoming Talks and Workshops
- I will give a keynote at the Eighth Summer School on Statistical Methods for Linguistics and Psychology (9-13 September).
Some Older Invited Talks and Workshops with Material
- What’s your prior? Psychological Forum, Department of Psychology, University of Amsterdam. Together with Angelika Stefan. link to video and slides
- One World Cognitive Psychology Seminar at the University of Mannheim in November, 2020. Here is the link to the youtube video
- Bayesian hierarchical modeling of cognitive processes: Benefits and pitfalls (November, 2019). Invited talk at the Psychonomics pre-conference Current Trends in Mathematical Psychology, Montreal, Canada. The abstract can be found here.
gitandR Markdown: Two Useful Tools for a Fully Reproducible Workflow (October, 2019). Workshop invited by the Open Science Community Amsterdam. The slides can be found here.- Modeling Individual Differences in a Bayesian Framework (September, 2019). Lecture at the 3rd Summer School on Statistical Methods for Linguistics and Psychology, University of Potsdam, Germany. You can find the talk here.
- Theory and practice of Bayesian inference using JASP (June, 2019). Webinar together with Johnny van Doorn and Alexander Etz for the Society of Personality and Social Psychology’s online learning platform. The video is available on youtube.
- A Bayesian modeling approach for individual differences (May, 2019). Talk at the Department of Brain and Cognition at KU Leuven. You can find the talk here.
Invite Me! I enjoy giving workshops and talks. If
you would like to invite me to your university, contact me. My expertise is in Bayesian hierarchical
modeling, individual differences, meta-analysis, and reproducible coding
in R.
⇡ up
Lab Meetings
The Amsterdam Mathematical Psychology Lab organizes biweekly lab meetings at the Psych Methods group to discuss topics around mathematical psychology, Bayesian modeling and computational modeling. The lab meeting is currently open to collaborators, PhD students and master students. If you would like to join on a regular basis shoot me an email!
⇡ up
Contact
Julia Haaf
New Email: drjmhaaf [at] gmail [dot] com
If you are interested in working with me on a project I am happy to hear from you!
⇡ up
Links
You can find me on
Other links:
- Department of Psychology, University of Potsdam
- Former lab together with Dora Matzke, Andrew Heathcote, and Michael Nunez: Amsterdam Mathematical Psychology Laboratory
- Former lab at the University of California, Irvine: Structure in Perception and Cognition Lab
- Former lab at the University of Cologne: Research Methods and Experimental Psychology
⇡ up