PERMUTATION TESTS AND OUTGROUPS

John W H Trueman

doi:10.1111/j.1096-0031.1996.tb00012.x

PERMUTATION TESTS AND OUTGROUPS

Cladistics. 1996 Sep;12(3):253-261. doi: 10.1111/j.1096-0031.1996.tb00012.x.

Author

John W H Trueman¹

Affiliation

¹ Research School of Biological Sciences, Australian National University, Canberra, ACT 0200, Australia.

PMID: 34920628
DOI: 10.1111/j.1096-0031.1996.tb00012.x

Abstract

- Commonly used permutation tail probability (PTP) and topology dependent permutation tail probability (T-PTP) tests incorporate an inappropriate treatment of designated outgroup taxa, and for that reason are biased either for (PTP) or for or against (T-PTP) rejection of the null hypothesis. A modified test is proposed, in which this source of bias is eliminated.