Statistical heartburn: an attempt to digest four pizza publications from the Cornell Food and Brand Lab

BMC Nutrition
Tim van der ZeeNicholas J L Brown

Abstract

We present the results of a reanalysis of four articles from the Cornell Food and Brand Lab based on data collected from diners at an Italian restaurant buffet. We calculated whether the means, standard deviations, and test statistics were compatible with the sample size. Test statistics and p values were recalculated. We also applied deductive logic to see whether the claims made in each article were compatible with the claims made in the others. We have so far been unable to obtain the data from the authors of the four articles. A thorough reading of the articles and careful reanalysis of the results revealed a wide range of problems. The sample sizes for the number of diners in each condition are incongruous both within and between the four articles. In some cases, the degrees of freedom of between-participant test statistics are larger than the sample size, which is impossible. Many of the computed F and t statistics are inconsistent with the reported means and standard deviations. In some cases, the number of possible inconsistencies for a single statistic was such that we were unable to determine which of the components of that statistic were incorrect. Our Appendix reports approximately 150 inconsistencies in these four ...Continue Reading

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Citations

Oct 17, 2018·BMJ : British Medical Journal·Marcus R MunafòTheresa M Marteau
Oct 28, 2019·Frontiers in Psychology·Charles SpenceGijs Huisman
Feb 6, 2020·Sports Medicine·Aaron R CaldwellUNKNOWN Consortium for Transparency in Exercise Science (COTES) Collaborators
Aug 30, 2019·The International Journal of Behavioral Nutrition and Physical Activity·Daina KosīteGareth J Hollands
Mar 8, 2021·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·Mariella PaulAntonio Schettino
May 26, 2021·Journal of Clinical Epidemiology·Esmee M BordewijkMadelon van Wely
May 18, 2021·Royal Society Open Science·Sabine HoffmannAnne-Laure Boulesteix

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Software Mentioned

statcheck
rpsychi
GRIM
GRIMMER
Excel
Python
R

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