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How robust are meta-analyses to publication bias? Sensitivity analysis methods and empirical findings
mardi 07 mars 2023
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Descriptif
Publication bias can distort meta-analytic results, sometimes justifying
considerable skepticism toward meta-analyses. This talk will discuss
recently developed statistical sensitivity analyses for publication
bias, which enable statements such as: “For publication bias to shift
the observed point estimate to the null, ‘significant’ results would
need to be at least 10-fold more likely to be published than negative or
‘non-significant’ results” or “no amount of publication bias could
explain away the average effect.” The methods are based on
inverse-probability weighted estimators and use robust estimation
methods to accommodate non-normal population effects, small
meta-analyses, and clustering. Additionally, a meta-analytic point
estimate corrected for “worst-case” publication bias can be obtained
simply by conducting a standard meta-analysis of only the negative and
nonsignificant studies; this method sometimes indicates that no amount
of such publication bias could explain away the results. I will describe
the results of applying the methods to a systematic sample of 58
meta-analyses across multiple scientific disciplines. All methods are
implemented in the R package PublicationBias.
Support en PDF de la conférence de Maya Mathur.
Conférence de Maya Mathur ((Stanford University) dans le cadre du Colloquium du département d'Etudes Cognitives de l'ENS-PSL.
Thèmes :
Sciences cognitives
Catégories:
Colloquium du DEC
Mot-clés :
Publication scientifique,
statistique,
méta-analyse
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Auteur(s)
Maya Mathur
Stanford university
Statisticienne
Plus sur cet auteur
Voir la fiche de l'auteur
Cursus :
Maya Mathur est professeure adjointe à l'unité des sciences quantitatives et au département de pédiatrie de l'université de Stanford. Elle est directrice associée du Stanford Data Science's Center for Open and Reproducible Science (CORES).
Elle est statisticienne et ses recherches méthodologiques portent sur la méta-analyse et d'autres formes de synthèse des données, ainsi que sur l'inférence causale. Elle a reçu des prix de la Society for Epidemiologic Research (2022), de la Society for Research Synthesis Methods (2022) et de l'American Statistical Association (2018).
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Annexes
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Dernière mise à jour :
07/04/2023
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