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Daniel Lakens
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Impossibly hungry judges
I was listening to a recent Radiolab episode on blame and guilt, where the guest Robert Sapolsky mentioned a famous study on judges
handing out harsher sentences before lunch than after lunch. The idea is that their
mental resources deplete over time, and t...

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Verisimilitude, Belief, and Progress in Psychological Science
Does science offer a way to learn what is true about our
world? According to the perspective in philosophy of science known as scientific realism , the answer is ‘yes’.
Scientific realism is the idea that successful scientific theories that have made
novel ...

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How a power analysis implicitly reveals the smallest effect size you care about
When designing a study, you need to justify the
sample size you aim to collect. If one of your goals is to observe a p -values lower than the alpha level you decided upon (e.g., 0.05), one
justification for the sample size can be a power analysis. A power a...

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Five reasons blog posts are of higher scientific quality than journal articles
The Dutch toilet cleaner ‘WC-EEND’
aired a famous commercial
in 1989 that had the slogan ‘We from WC-EEND advise… WC-EEND’. It is now a
common saying in The Netherlands whenever someone gives an opinion that is
clearly aligned with their self-interest. In t...

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Equivance testing in the free community driven software jamovi.

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Equivalence testing in jamovi
One of the challenges of trying to get
people to improve their statistical inferences is access to good software.
After 32 years, SPSS still does not give a Cohen’s d effect size when researchers
perform a t-test. I’m a big fan of R nowadays, but I still re...

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No, the p-values are not to blame: Part 53
In the latest exuberant celebration of how Bayes Factor will save science, Ravenzwaaij and Ioannidis write: “our study offers through simulations yet another demonstration of the unfortunate effect of p-values on statistical inferences.” Uh oh – what have t...

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