The Stat Wars and Their Casualties

The Statistics Debate

October 15, 2020: Noon – 2 pm ET
(17-19:00 London Time)

(Online webinar debate, free but must register to attend on website above)


Debate Host: Dan Jeske (University of California, Riverside)

Jim Berger (Duke University)
Deborah Mayo (Virginia Tech)
David Trafimow (New Mexico State University)

Where do you stand?

  • Given the issues surrounding the misuses and abuse of p-values, do you think p-values should be used?
  • Do you think the use of estimation and confidence intervals eliminates the need for hypothesis tests?
  • Bayes Factors – are you for or against?
  • How should we address the reproducibility crisis?

If you are intrigued by these questions and have an interest in how these questions might be answered – one way of the other – then this is the event for you!

Want to get a sense of the thinking behind the practicality (or not) of various statistical approaches?  Interested in hearing both sides of the story – during the same session!?

This event will be held in a debate type of format. The participants will be given selected questions ahead of time, so they have a chance to think about their responses, but this is intended to be much less of a presentation and more of a give and take between the debaters.

So – let’s have fun with this!  The best way to find out what happens is to register and attend!

September 24: Bayes factors from all sides: who’s worried, who’s not, and why (R. Morey)

The second meeting of our New Phil Stat Forum*:

The Statistics Wars
and Their Casualties

September 24: 15:00 – 16:45  (London time)
10-11:45 am (New York, EDT) 

“Bayes Factors from all sides:
who’s worried, who’s not, and why”

Richard Morey


Richard Morey is a Senior Lecturer in the School of Psychology at the Cardiff University. In 2008, he earned a PhD in Cognition and Neuroscience and a Masters degree in Statistics from the University of Missouri. He is the author of over 50 articles and book chapters, and in 2011 he was awarded the Netherlands Research Organization Veni Research Talent grant Innovational Research Incentives Scheme grant for work in cognitive psychology. His work spans cognitive science, where he develops and critiques statistical models of cognitive phenomena; statistics, where he is interested in the philosophy of statistical inference and the development of new statistical tools for research use; and the practical side of science, where he is interested in increasing openness in scientific methodology. Morey is the author of the BayesFactor software for Bayesian inference and writes regularly on methodological topics at his blog.


R. Morey: Should we Redefine Statistical Significance

Relevant background readings for this meeting covered in the initial LSE 500 Phil Stat Seminar can be found on the Meeting #4 blogpost 
     SIST: Excursion 4 Tour II    Megateam: Redefine Statistical Significance: 

Information and directions for joining our forum are here..

Slides and Video Links:

Morey’s slides “Bayes Factors from all sides: who’s worried, who’s not, and why” are at this link:

Video Link to Morey Presentation:

Video Link to Discussion of Morey Presentation:

Mayo’s Memos: Any info or events that arise that seem relevant to share with y’all before the meeting.

*Meeting 9 of our the general Phil Stat series which began with the LSE Seminar PH500 on May 21

August 20 (meeting 8) of Phil Stat Seminar : Preregistration as a Tool to Evaluate Severity (D. Lakens)


We begin our new Phil Stat forum:

The Statistics Wars
and Their Casualties

August 20: The time is 15:00 – 16:45  (London) 10-11:45 am (New York) EDT

“Preregistration as a Tool to Evaluate
the Severity of a Test”

Daniël Lakens

Eindhoven University of Technology

Reading (by Lakens)

“The value of preregistration for psychological science: A conceptual analysis”, Japanese Psychological Review 62(3), 221–230, (2019).

Optional editorial: “Pandemic researchers — recruit your own best critics”, Nature 581, p. 121, (2020).

Information and directions for joining our forum are here.


Prof. D. Lakens’ slides (PDF)


VIDEO LINKS (3 parts):
(Viewing in full screen mode helps with buffering issues.)

Part 1: Mayo’s Introduction & Lakens’ presentation
Part 2: Lakens’ presentation continued
Part 3: Discussion


New Phil Stat Forum

The Statistics Wars
and Their Casualties

Delayed (from 19-20 June 2020*) is now a monthly remote forum** 

*London School of Economics (CPNSS)

Alexander Bird (King’s College London), Mark Burgman (Imperial College London),
Daniele Fanelli (London School of Economics and Political Science),
Roman Frigg (London School of Economics and Political Science),
David Hand (Imperial College London), Christian Hennig (University of Bologna), Katrin Hohl (City University London), Daniël Lakens (Eindhoven University of Technology), Deborah Mayo (Virginia Tech), Richard Morey (Cardiff University),
Stephen Senn (Edinburgh, Scotland), Jon Williamson (University of Kent)*

While the field of statistics has a long history of passionate foundational controversy the last decade has, in many ways, been the most dramatic. Misuses of statistics, biasing selection effects, and high powered methods of Big-Data analysis, have helped to make it easy to find impressive-looking but spurious, results that fail to replicate. As the crisis of replication has spread beyond psychology and social sciences to biomedicine, genomics and other fields, people are getting serious about reforms.  Many are welcome (preregistration, transparency about data, eschewing mechanical uses of statistics); some are quite radical. The experts do not agree on how to restore scientific integrity, and these disagreements reflect philosophical battles–old and new– about the nature of inductive-statistical inference and the roles of probability in statistical inference and modeling. These philosophical issues simmer below the surface in competing views about the causes of problems and potential remedies. If statistical consumers are unaware of assumptions behind rival evidence-policy reforms, they cannot scrutinize the consequences that affect them (in personalized medicine, psychology, law, and so on). Critically reflecting on proposed reforms and changing standards requires insights from statisticians, philosophers of science, psychologists, journal editors, economists and practitioners from across the natural and social sciences. This workshop will bring together these interdisciplinary insights–from speakers as well as attendees.

Workshop OrganizersD. Mayo and R. Frigg

Logistician (chief logistics and contact person): Jean Miller 

**FORUM: This will be both a continuation of our LSEPH500 Seminar and a link to our delayed (but future) workshop. For information about how to join, see this pdf

For an explanation about the meaning of statistical crises and their casualties see here.

Past & Future Meetings:

[For information about how to join, see this pdf]

August 20, 2020 (15:00-16:45 (London); 10-11:45 a.m. (New York) EDT): Professor Daniël Lakens (Eindhoven University of Technology (mini-bio)) “Preregistration as a Tool to Evaluate the Severity of a Test”. (For slides, recording & readings from this meeting, see this post.)

September 24, 2020 (15:00-16:45 (London); 10-11:45 a.m. (New York) EDT):  Professor Richard Morey (Cardiff University (mini-bio)). “Bayes factors from all sides: who’s worried, who’s not, and why”. (For slides, recording & readings from this meeting, see this post.)

October 15, 2020. Statistics (P-value) Debate. Sponsored by the National Institute of Statistical Science: (For a recording, see this article.)

November 19, 2020 (15:00-16:45 (London); 10-11:45 a.m. (New York) EDT): Stephen Senn (Statistical Consultant, Scotland (mini-bio)).“Randomisation and control in the age of coronavirus?” (Abstract)

December 17, 2020 (15:00-16:45 (London); 10-11:45 a.m. (New York) EDT): D. Mayo (Philosophy, Virginia Tech (mini-bio)) TBA but might do a long promised talk on Birnbaum and the Likelihood Principle.

January 28, 2021 (15:00-16:45 (London); 10-11:45 a.m. (New York) EDT): Alexander Bird (Philosophy, King’s College London,Bertrand Russell Professor, University of Cambridge (mini-bio)). TBA

February 18, 2021 (15:00-16:45 (London); 10-11:45 a.m. (New York) EDT)Christian Hennig (Statistics, University of Bologna (mini-bio)). TBA