THE RETENTION INDEX AND THE RESCALED CONSISTENCY INDEX

@article{Farris1989THERI,
  title={THE RETENTION INDEX AND THE RESCALED CONSISTENCY INDEX},
  author={James S Farris},
  journal={Cladistics},
  year={1989},
  volume={5}
}
  • J. Farris
  • Published 1 December 1989
  • Mathematics
  • Cladistics
as a measure ol'6t ofa character to a tree, has been widely and successfully employed, but might be capable of some improvement for certain applications. 'The purpose of this note is to dcwrihe two new indices, already in use in Hennig86, and to explain their interpretation. The consistency index, 
Data Decisiveness, Missing Entries, and the DD Index
The decisiveness of a data set has been defined as the degree to which all possible dichotomous trees for that data set differ in length, and the DD statistic (the data decisiveness index) has been
EXACT INDICES, CRITERIA TO SELECT FROM MINIMUM LENGTH TREES
  • Michael J. Sharkey
  • Medicine, Biology
    Cladistics : the international journal of the Willi Hennig Society
  • 1993
TLDR
The consistency index is modified to deal with characters with unknown entries, and three indices are proposed, i.e. the exact consistently index, the exact retention index and the exact rescaled consistency index.
Ratio of explanatory power (REP): a new measure of group support.
TLDR
BS measures the difference in the explanatory power of the two hypotheses, and is therefore a measure of objective support (Grant and Kluge, 2003); it varies between 0 and 1, and it has been employed in empirical studies.
HOMOPLASY AND THE CHOICE AMONG CLADOGRAMS
  • P. Goloboff
  • Medicine, Mathematics
    Cladistics : the international journal of the Willi Hennig Society
  • 1991
TLDR
Despite some recent assertions to the contrary, the consistency index is an appropriate measure of homoplasy (= deviation from hierarchy).
BRANCH SUPPORT AND TREE STABILITY
Abstract— Branch support is quantified as the extra length needed to lose a branch in the consensus of near‐most‐parsimonious trees. This approach is based solely on the original data, as opposed to
EXCESS HOMOPLASY RATIOS
Abstract Archie (1990) prefers his “homoplasy excess ratio” HER to Farris' (1989) 1 ensemble retention index R. HER, he writes, lacks R's defects: R's minimum is not zero, and varies with number of
Measuring Support for Phylogenies: The “Proportional Support Index”
The total support index (Bremer, 1994), a measure of cladogram support, is influenced both by character incongruence and by uninformative characters. A modified version of this index is therefore
Measuring Support for Phylogenies: The “Proportional Support Index”
The total support index (Bremer, 1994), a measure of cladogram support, is influenced both by character incongruence and by uninformative characters. A modified version of this index is therefore
Successive Weighting and Polymorphic Terminals—A Warning to PAUP Users
TLDR
The naïve user of PAUP 3.1 (and earlier versions) is warned about a shortcoming in the program's successive weighting facility, which has been corrected in PAUP* version 4.0.
PARSIMONY AND WEIGHTING: A REPLY TO TURNER AND ZANDEE
  • P. Goloboff
  • Medicine, Biology
    Cladistics : the international journal of the Willi Hennig Society
  • 1995
TLDR
It is shown that there is no basis for Turner and Zandee’s criticism of the Goloboff method of weighting, and that the “new” findings presented are not such-they are well-known facts-and that they constitute in themselves no evidence against the method, or any other.
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The issue of choice among multiple equally parsimonious cladograms, and three statistics considered, are addressed: the consistency index, F-ratio, D and the D measure, an application of the Shannon entropy statistic from Gatlin (1972).
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The purpose of this note is to point out a pitfall in the method of comparing the shapes of trees through their matrices of cladistic difference and to present a new method for comparing shapes of Trees which seems to present fewer difficulties than methods now in use.
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