Blog Archives

Assessing the evidential value of journals with p-curve, R-index, TIVA, etc: A comment on Motyl et al. (2017) with new data

October 6, 2017
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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...

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Correcting bias in meta-analyses: What not to do (meta-showdown Part 1)

October 5, 2017
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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...

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Correcting bias in meta-analyses: What not to do (meta-showdown Part 1)

June 9, 2017
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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...

Read more »

Assessing the evidential value of journals with p-curve, R-index, TIVA, etc: A comment on Motyl et al. (2017) with new data

May 9, 2017
By

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...

Read more »

German Psychological Society fully embraces open data, gives detailed recommendations

February 15, 2017
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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...

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Two meanings of priors, part II: Quantifying uncertainty about model parameters

January 17, 2017
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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...

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Two meanings of priors, part I: The plausibility of models

January 10, 2017
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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...

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Honoured to receive the Leamer-Rosenthal-Prize

December 19, 2016
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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...

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Best Paper Award for the “Evolution of correlations”

September 29, 2016
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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...

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Reflections about our first Open-Science-Committee’s meeting

September 29, 2016
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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...

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