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

. (more…)

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 (more…)

New Phil Stat Forum

The Statistics Wars
and Their Casualties

(New Date: April 4-5, 2022*) is now a monthly remote forum** 

*London School of Economics (CPNSS)

Yoav Benjamini (Tel Aviv University), Alexander Bird (University of Cambridge),
Mark Burgman (Imperial College London), Daniele Fanelli (London School of Economics and Political Science), Roman Frigg (London School of Economics and Political Science), Stephen Guettinger (London School of Economics and Political Science), David Hand (Imperial College London), Margherita Harris* (London School of Economics and Political Science), 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)


Meeting 7 (July 30)–Discussion of JSM 2020 Panel on P-values & “Statistical Significance”

All: On July 30 (10am EST) I will give a virtual version of my JSM presentation, remotely like the one I will actually give on Aug 6 at the JSM. Co-panelist Stan Young may as well. One of our surprise guests tomorrow (not at the JSM) will be Yoav Benjamini!  If you’re interested in attending our July 30 practice session* please follow the directions here. Background items for this session are in the “readings” and “memos” of session 5.

Members: Materials resulting from Meeting 7:

“Work of renowned UK psychologist Hans Eysenck ruled ‘unsafe’”, The Guardian (Oct 11, 2019) (LINK).

*unless you’re already on our LSE Phil500 list

JSM 2020 Panel Flyer (PDF)
JSM online program w/panel abstract & information):

Slides & Video Links for Meeting 7:




Meeting 6 (June 25)

VI. (June 25) BONUS MEETING: Power, shpower, severity, positive predictive value (diagnostic model) & a Continuation of The Statistics Wars and Their Casualties

There will also be a guest speaker: Professor David Hand:
      “Trustworthiness of Statistical Analysis”



Meeting 5 (June 18)


V. (June 18) The Statistics Wars and Their Casualties


SIST: Excursion 4 Tour III: pp. 267-286; Farewell Keepsake pp. 436-444

-Amrhein, V., Greenland, S., & McShane, B., (2019). Comment: Retire Statistical Significance, Nature, 567: 305-308.

-Ioannidis J. (2019). “The Importance of Predefined Rules and Prespecified Statistical Analyses: Do Not Abandon Significance.” JAMA. 321(21): 2067–2068. doi:10.1001/jama.2019.4582

-Mayo, DG. (2019), P‐value thresholds: Forfeit at your peril. Eur J Clin Invest, 49: e13170. doi: 10.1111/eci.13170

Recommended (and fun) P-values on Trial: Selective Reporting of (Best Practice Guides Against) Selective Reporting


Meeting 4 (June 11)

getting beyond…

IV. (June 11) Rejection Fallacies: Do P-values exaggerate evidence? Jeffreys-Lindley paradox or Bayes/Fisher disagreement:


SIST: Excursion 4 Tour II

Recommended (if time): Excursion 4 Tour I: The Myth of “The Myth of Objectivity” 

Mayo Memos for Meeting 4


Meeting 3 (June 4)

III. (June 4) Deeper Concepts: Confidence Intervals and Tests: Higgs’ Discovery:


SIST: Excursion 3 Tour III 

(Strongly) Recommended (as much as interests you) Excursion 3 Tour II:It’s the Methods Stupid: Howlers and Chestnuts of Tests

General Info Items:  


at-home seminar room w/ blackboard

(Thebes) conference room for seminar

amp & mike

on the desk outside conference room