Sebastian Hellmann

Check out the details to improve your hierarchical analyses and leave some comments!

The good news: We provide a simple, correct computation that accounts for this variability, ensuring accurate group-level inferences. This fix is crucial for reliable conclusions in all cognitive models with constrained parameters.

For all who use Bayesian hierarchical models, have a look at our new preprint, out now together with Linus Hof, Nuno Busch, and Thorsten Pachur at the TU Munich: osf.io/preprints/psya…

Happy to share our latest publication, out now in @CognitionJourn, where we find that metacognitive self-beliefs are updated in a suprisingly domain-specific manner. sciencedirect.com/science/articl…

⭐️PhD in Cognitive/Computational Psychology⭐️ PhD alert! Do your PhD with me and use Reinforcement Learning to study how misinformation affects us. Deadline: October 7. Please RT! For more information: findaphd.com/phds/project/c…

Excited to share our preprint & my first PhD output! We found that a manipulation of prior beliefs about task performance causally induces under- and overconfidence: biorxiv.org/content/10.110… w/ modeling 🧙‍♂️ #PierreleDenmat, #TomVerguts & @KobeDesender at @KULeuven #tweeprint⬇️(1/9)

This is the kind of unique content I’m here for.

Excited to share new work with @DobyRahnev where we test convolutional neural networks on a range of perceptual tasks involving stimulus energy manipulations (joint changes in stimulus intensity and variability): biorxiv.org/content/10.110… (1/4)

Happy to share that this is now published and open access in Cognitive Psychology! doi.org/10.1016/j.cogp…

Summing up: Human observers seem to make use of all three variables, which would also be used by a Bayesian optimal computation of confidence. However the detailed computations may differ. Feedback and comments are very welcome!

2. 2DSDT (model without parallel accumulation of visibility information), and 3. 2DSD (model only assuming post-decisional accumulation of evidence)

New preprint together with @ManuelRausch5 about the importance to consider decision time when reflecting on the accuracy of a decision: osf.io/preprints/psya… A "short" summary: