This post is an extended synopsis of Linde, M., Tendeiro, J. N., Selker, R., Wagenmakers, E.-J., & van Ravenzwaaij, D. (submitted). Decisions about equivalence: A comparison of TOST, HDI-ROPE, and the Bayes factor. Preprint available on PsyArXiv: https://psyarxiv.com/bh8vu   Abstract Some important research questions require the ability to find evidence for two conditions being practically equivalent. This is impossible to…

Background: the 2018 article “Redefine Statistical Significance” suggested that it is prudent to treat p-values just below .05 with a grain of salt, as such p-values provide only weak evidence against the null. Here we provide another empirical demonstration of this fact. Specifically, we examine the degree to which recently published data provide evidence for the claim that students who…

What is the idea? We invite researchers to answer two theoretically relevant research questions by analyzing a recently collected dataset on religion and well-being (N=10,535 from 24 countries). We aim to evaluate the relation between religiosity and well-being using a many analysts approach (cf. Silberzahn et al., 2018). This means that we are inviting multiple analysis teams to answer the…

Available on https://psyarxiv.com/fs562, this is a Bayesian analysis of the Pfizer Phase 3 clinical trial on a vaccine against COVID-19. Alternative analyses have been presented by Bob Carpenter, Sebastian Kranz, and Chuck Powell. On Monday November 9th 2020, Pfizer and BioNTech issued a press release1 in which Pfizer CEO Dr. Albert Bourla stated: “Today is a great day for science…

Twitter giveth joy, and Twitter taketh it away. This time, Twitter giveth, and in abundance, as I just learned from a tweet of Katie Corker that all APA core titles will require TOP Level 1 transparency for the sharing of data and materials: The Center for Open Science tweet: From the COS statement: “The APA said it will officially begin implementing…

About a year ago my former PhD-student Don van Ravenzwaaij challenged me to write a book that explains Bayesian inference to toddlers, using dinosaurs as the main vehicle of exposition. “I don’t think it’s possible”, Don said. In the words of Michael Jordan, “I took that personally”. Over the past year, I have been tweaking the storyline, and Viktor Beekman…

Summary In the popular indoor mall “Hilvertshof”, in the Dutch town of Hilversum, on Monday October 12th, 2020, at about 3 pm, I counted 175 adults wearing a face mask, and 261 adults not wearing a face mask, for a mask wearing percentage of about 40%. Based on this data collection experience, I also offer four conjectures that future research…