tl;dr: Publication bias and p-hacking can dramatically inflate effect size estimates in meta-analyses. Many methods have been proposed to correct for such bias and to estimate the underlying true effect. In a large simulation study, we studied which me...
Recently, Matt Motyl et al. (2017) posted a pre-print paper in which they contrasted the evidential value of several journals in two time periods (2003-2004 vs. 2013-2014). The paper sparked a lot of discussion in Facebook groups [1][2], blog posts com...
tl;dr: The German Psychological Society developed and adopted new recommendations for data sharing that fully embrace openness, transparency and scientific integrity. Key message is that raw data are an essential part of an empirical publication and mu...
by Angelika Stefan & Felix Schönbrodt This is the second part of “Two meanings of priors”. The first part explained a first meaning – “priors as subjective probabilities of models”. While the first meaning of priors r...
by Angelika Stefan & Felix Schönbrodt When reading about Bayesian statistics, you regularly come across terms like “objective priors“, “prior odds”, “prior distribution”, and “normal prior”. However, it may not be intuitively clear...
I’m honoured that the Berkeley Initiative for Transparency in the Social Sciences (BITSS) chose me for one of the 2016 Leamer-Rosenthal Prizes for Open Social Science! This award comes with a prize of $10,000 and “recognizes important contrib...
The Reproducibility Project: Psychology was published last week, and it was another blow to the overall credibility of the current research system’s output. Some interpretations of the results were in a “Hey, it’s all fine; nothing to...
Yesterday, we had the first meeting of our department’s Open Science Committee. I am happy that the committee has 20 members, representing every research unit of the department, and all groups from PhD students to full professors. In the meeting, I f...
I am pleased to announce that Marco Perugini and I have received the 2015 Best Paper Award from the Association of Research in Personality (ARP) for our paper: Schönbrodt, F. D., & Perugini, M. (2013). At what sample size do correlations stabilize...
If we want to shift from a closed science to an open science, there has to be change at several levels. In this process, it’s easy to push the responsibility (and the power) for reform onto “the system”: “If only journals changed their ...
