Journal
ANNALS OF APPLIED STATISTICS
Volume 5, Issue 3, Pages 1752-1779Publisher
INST MATHEMATICAL STATISTICS
DOI: 10.1214/11-AOAS466
Keywords
Reproducibility; association; mixture model; copula; iterative algorithm; irreproducible discovery rate; high-throughput experiment; genomics
Categories
Funding
- NIH [1U01HG004695-01, 1-RC2-HG005639-01, R21EY019094]
Ask authors/readers for more resources
Reproducibility is essential to reliable scientific discovery in high-throughput experiments. In this work we propose a unified approach to measure the reproducibility of findings identified from replicate experiments and identify putative discoveries using reproducibility. Unlike the usual scalar measures of reproducibility, our approach creates a curve, which quantitatively assesses when the findings are no longer consistent across replicates. Our curve is fitted by a copula mixture model, from which we derive a quantitative reproducibility score, which we call the irreproducible discovery rate (IDR) analogous to the FDR. This score can be computed at each set of paired replicate ranks and permits the principled setting of thresholds both for assessing reproducibility and combining replicates. Since our approach permits an arbitrary scale for each replicate, it provides useful descriptive measures in a wide variety of situations to be explored. We study the performance of the algorithm using simulations and give a heuristic analysis of its theoretical properties. We demonstrate the effectiveness of our method in a ChIP-seq experiment.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available