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Transition Confidence and Modified Mean Values: Confidence Measures for Hypotheses of Character State Transition between Nodes and Ancestral State Optimizations
Author(s) -
Sharkey Michael J.
Publication year - 1999
Publication title -
cladistics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.323
H-Index - 92
eISSN - 1096-0031
pISSN - 0748-3007
DOI - 10.1111/j.1096-0031.1999.tb00253.x
Subject(s) - character (mathematics) , state (computer science) , measure (data warehouse) , transition (genetics) , mathematics , transformation (genetics) , computer science , biology , data mining , algorithm , genetics , geometry , gene
A measure is introduced to quantify the reliability of character state transitions and character state stasis (lack of character state change between nodes). The mean value of a character state at an internal node is altered to obtain a measure termed the modified mean. Modified mean values at connecting nodes are employed to determine the support for hypotheses of character state transition/stasis between the nodes. The lowest of the two neighboring modified mean values implied by an hypothesis of character state transition/stasis is used as a direct measure of support for that hypotheses of character state transformation or stasis between the respective nodes.