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. 2009 Dec;27(12):1135-7.
doi: 10.1038/nbt1209-1135.

How does multiple testing correction work?

William S Noble  1
Affiliations

How does multiple testing correction work?

William S Noble. Nat Biotechnol. 2009 Dec.

Abstract

Drawing valid conclusions from an experiment often requires associating statistical confidence measures with the observed data. But these measures can be stated in terms of p-values, false discovery rates or q-values. What are the differences? And how should you decide which one to use?

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Figures

Figure 1
Figure 1. Scanning human chromosome 21 for CTCF binding motifs
(A) The position-specific scoring matrix is represented as a sequence logo [9], in which the height of each letter is proportional to the information content at that position. The CTCF model is from [2]. (B) The 20 top-scoring occurrences of the CTCF binding site in human chromosome 21. Coordinates of the starting position of each occurrence are given with respect to human genome assembly NCBI 36.1. (C) A histogram of scores produced by scanning a shuffled version of human chromosome 21 with the CTCF motif. (D) This panel zooms in on the right tail of the distribution shown in panel (C). The blue histogram corresponds to the observed score distribution from scanning a shuffled chromosome, and the grey line corresponds to the analytic distribution. The p-value associated with an observed score of 17 is equal to the area under the curve to the right of 17. (E) The FDR is estimated from the empirical null distribution for a score threshold of 17.00. There are 35 null scores > 17 and 519 observed scores > 17, leading to an estimate of 6.7%. This procedure assumes that the number of observed scores equals the number of null scores.
See this image and copyright information in PMC

References

    1. Phillips JE, Corces VG. CTCF: master weaver of the genome. Cell. 2009;137:1194–1211. - PMC - PubMed
    1. Kim TH, et al. Analysis of the vertebrate insulator protein CTCF-binding sites in the human genome. Cell. 2007;128:1231–1245. - PMC - PubMed
    1. Staden R. Searching for motifs in nucleic acid sequences. Methods in Molecular Biology. 1994;25:93–102. - PubMed
    1. Benjamini Y, Hochberg Y. Controlling the false discovery rate: a practical and powerful approach to multiple testing. Journal of the Royal Statistical Society B. 1995;57:289–300.
    1. Kerr KF. Comments on the analysis of unbalanced microarray data. Bioinformatics. 2009;25:2035–2041. - PMC - PubMed

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