Our Open Letter Was Desk-Rejected at JPSP: An Argument for Sorrow, and an Argument for Joy

In a previous blog post I mentioned an open letter that a group of 27 social psychologists, methodologists, and advocates for open science had sent to Dr. Shinobu Kitayama, incoming editor of Journal of Personality and Social Psychology: Attitudes and Social Cognition (JPSP:ASC). The letter was motivated by a recent editorial in JPSP:ASC in which Dr. Kitayama stated his desire…

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Introducing JASP 0.8.2.0

Released this week, JASP version 0.8.2.0 brings a number of improvements. For data visualization, the most prominent advance is the extension of the “split-by” functionality (courtesy of JASP team member Erik-Jan van Kesteren). To demonstrate how it works, we plot data from a study conducted at the University of Melbourne in the 1970s, examining the possible relation between hair color…

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An Open Letter to Dr. Shinobu Kitayama

Dr. Shinobu Kitayama, the incoming editor of Journal of Personality and Social Psychology: Attitudes and Social Cognition (JPSP:ASC), recently outlined his vision for the future. His main purpose is to “see to it that JPSP:ASC functions as a beacon for the active, field-wide effort toward the constructive, future-oriented, positive transformation of the discipline. It is my hope that engaging in…

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Bayesian Spectacles for Everyone!

On particular occasions I find myself almost indifferent about the distinction between frequentist and Bayesian statistics. Usually this happens on weekends, after a few drinks, when my son has fallen asleep, and I am watching my favorite TV show. In those moments of weakness, I find myself thinking “Why all the fuss — often the two paradigms lead to the…

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Interview With A Team Member: Tim de Jong

In our series Interview With A Team Member, we aim to introduce the people behind the JASP-project. Today we are interviewing Tim de Jong, one of our software developers! Tim de Jong is a software developer at JASP. He is responsible for improving the R analyses and enriching the Bayesian ANOVA and t-tests. To contact Tim, you can send him…

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Redefine Statistical Significance: An Interview with Jim Berger

Jim Berger is one of the most prominent Bayesian statisticians alive today. Berger combines strong mathematical ability with a deep knowledge about the foundations of Bayesian inference; for decades Berger has contributed valuable new insights and procedures, and is partly responsible for the increased prominence of objective Bayesian inference. Moreover, Jim Berger has the rare gift of being able to…

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Exact P-Values Upon Request: Breaking with an APA Guideline

The 6th edition of the APA style manual (American Psychological Association, 2010) states the following on the topic of reporting p-values: “When reporting p values, report exact p values (e.g., p = .031) to two or three decimal places. However, report p values less than .001 as p < .001. The tradition of reporting p values in the form p…

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Interesting Read: ‘Chancing It’ by Robert Matthews

In 34 short chapters, Prof. Robert Matthews provides an engaging tour of practically relevant topics whose treatment benefits from a little “common sense expressed in numbers”. These topics include lotteries, insurance, casinos, and the law. This book distinguishes itself favorably from others in its genre. The chapters are well written and relatively concise, making the work ideally suited for readers…

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Two Summer Workshops in Amsterdam

This year we organize two summer workshops in Amsterdam – the first focuses on Bayesian cognitive modeling, and the second focuses on Bayesian statistics with JASP. Before I outline the content of these workshops, let me recount how it was that bitter envy drove me to practical Bayesian modeling. A little over 10 years ago, in a small guest office…

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A New 5-Minute Video Introducing JASP

Our new introduction video demonstrates the basic functionality of JASP. In just under 5 minutes, the demo discusses data editing, the user-friendly GUI, the presence of both classical and Bayesian analyses, the ways in which JASP facilitates statistical transparency, and more. The video was voiced by Alexander Etz. Editing and animations were made by Alexandra Sarafoglou and Tim Draws. The…

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