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Adjustment for Multiplicity

  • Daniel Yekutieli
  • Dan Lin
  • Ziv Shkedy
  • Dhammika Amaratunga
Chapter
Part of the Use R! book series (USE R)

Abstract

The number of comparisons of gene expression level studied in a microarray experiment has been growing literarily at an exponential rate since the beginning of the 1990s. Considering a microarray data analyzed by testing each gene, multiple testing is an immediate concern. When many hypotheses are tested, the probability that a type I error is committed increases sharply with the number of hypotheses. This problem of multiplicity is not unique to microarray technology, yet its magnitude here, where a single experiment may involve many thousands of genes, dramatically intensifies the problem.In this chapter, we discuss a few procedures controlling for the FWER, such as the Bonferroni, Holm, and the maxT procedures. However, the focus of this chapter is controlling the FDR criterion, since it admits a more powerful outcome. We discuss several variations of the Benjamini and Hochberg step-up procedure (BH-FDR 1995), the permutation-based FDR controlling procedures, and the significance analysis of microarrays (SAM) approach of Tusher et al. (Proc Natl Acad Sci 98:5116–5121, 2001) and the Efron et al. (J Am Stat Assoc 96:1151–1160, 2001), and Storey (A direct approach to false discovery rates. Technical Report. Stanford University, Stanford, 2001) Bayesian interpretation of the FDR within the context of microarray data.

Keywords

False Discovery Rate Permutation Matrix True Null Hypothesis False Null Hypothesis Animal Behavior Study 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Daniel Yekutieli
    • 1
  • Dan Lin
    • 2
  • Ziv Shkedy
    • 3
  • Dhammika Amaratunga
    • 4
  1. 1.Department of Statistics and Operations Research, School of Mathematical SciencesTel-Aviv UniversityTel-AvivIsrael
  2. 2.Veterinary Medicine Research and DevelopmentPfizer Animal HealthZaventemBelgium
  3. 3.Interuniversity Institute for Biostatistics and Statistical Bioinformatics (I-BioStat), Center for Statistics (CenStat)Hasselt UniversityDiepenbeekBelgium
  4. 4.Biostatistics and ProgrammingJanssen Pharmaceutical Companies of Johnson & JohnsonRaritanUSA

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