Mayo editorial

The ASA controversy on P-values as an illustration of the difficulty of statistics


Christian Hennig
Department of Statistical Sciences
University of Bologna

The ASA controversy on P-values as an illustration of the difficulty of statistics

“I work on Multidimensional Scaling for more than 40 years, and the longer I work on it, the more I realise how much of it I don’t understand. This presentation is about my current state of not understanding.” (John Gower, world leading expert on Multidimensional Scaling, on a conference in 2009)

“The lecturer contradicts herself.” (Student feedback to an ex-colleague for teaching methods and then teaching what problems they have)

1 Limits of understanding

Statistical tests and P-values are widely used and widely misused. In 2016, the ASA issued a statement on significance and P-values with the intention to curb misuse while acknowledging their proper definition and potential use. In my view the statement did a rather good job saying things that are worthwhile saying while trying to be acceptable to those who are generally critical on P-values as well as those who tend to defend their use. As was predictable, the statement did not settle the issue. A “2019 editorial” by some of the authors of the original statement (recommending “to abandon statistical significance”) and a 2021 ASA task force statement, much more positive on P-values, followed, showing the level of disagreement in the profession. Continue reading

Categories: ASA Task Force on Significance and Replicability, Mayo editorial, P-values | 3 Comments

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