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    P Values vs Magnitude-based Inference: All new slideshow.

    Journal Impact Factors 2017: Values from the Scopus database.

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P Values vs Magnitude-based Inference

Will G Hopkins, Institute of Sport Exercise and Active Living, Victoria University, Melbourne, Australia. Email. Reviewer: Alan M Batterham, School of Health and Social Care, University of Teesside, Middlesbrough, UK. Sportscience 21, i, 2017 ( Published May 2017. 2017

A slideshow explaining p values, magnitude-based inference (MBI), and the American Statistical Association's policy statement on p values is now available. The slideshow has the title of the In-brief item in last year's Sportscience, P Values Down But Not Yet Out, and it represents an elaboration of that item. The slideshow was presented at the 8th International Conference on Kinesiology in Opatija, Croatia, May 10-14, 2017 and at various workshops subsequently.

Other resources on statistical inference

A one-hour lecture on data analysis and interpretation has an earlier summary of null-hypothesis testing and MBI.

The article describing the spreadsheet to derive MBI from a p value has a detailed explanation of clinical and non-clinical MBI. To derive MBI from a confidence interval use the spreadsheet to combine/compare effects (and read the accompanying article).

The first peer-reviewed article on MBI published here and in International Journal of Sports Physiology and Performance deals only with non-clinical inference.

The article on progressive statistics published here and in Medicine and Science in Sports and Exercise has a summary of MBI and much, much more.


Journal Impact Factors 2017

Will G Hopkins, Institute of Sport Exercise and Active Living, Victoria University, Melbourne, Australia. Email. Sportscience 21, i, 2017 ( Published September 2017. 2017

Download the workbook (28 KB) of impact factors.

As noted in a 2015 article, I have abandoned Thomson-Reuters' impact factors in favor of Elsevier's, which are derived from a bibliographic database (Scopus) more relevant to sport and exercise science, and which are freely available in a very large workbook (33 MB) at Journal Metrics. Elsevier refers to the impact factor as the CiteScore, but it is calculated in the same manner as the traditional impact factor. I have extracted the values for our journals into a user-friendly small workbook (28 KB), which has spreadsheets sorted by journal title and by 2016 impact factor. As of last year I will not be writing a full article on the impact factors.