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	Provedor de dados Naturalis (2) Autor Jenner, Ronald A. (1) Vaupel Klein, J.C. von (1) Palavra-chave Absence/presence coding (2) Character coding (2) 42.86 (1) A/p coding (1) Binarization (1) Boolean logic (1) Character linkage (1) Character state identity (1) Cladistic (1) Metazoa (1) Metazoan cladistics (1) Nonadditive binary coding (1) Mais... Tipo do documento Article / Letter to the editor (2) Ano 2009 (1) 2002 (1) País Netherlands (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Optimization of character coding and a stepwise execution of cladistic analyses Naturalis Vaupel Klein, J.C. von. The absence/presence routine of character coding is examined in regard to minimizing its inherent redundancy effects with the purpose of optimizing the structuring of a comprehensive, binary datamatrix. Cladistic analytical procedures are next evaluated with respect to the successive use of such a datamatrix at different hierarchical levels. It is concluded that performing a stepwise analysis has various advantages over the more oft en employed techniques, i.e., the ‘total analysis’ routines and the ‘partitioned’ approaches. Tipo: Article / Letter to the editor Palavras-chave: A/p coding; Absence/presence coding; Binarization; Character coding; Character linkage; Cladistic; 42.86. Ano: 2009 URL: http://www.repository.naturalis.nl/record/311950 Boolean logic and character state identity: pitfalls of character coding in metazoan cladistics Naturalis Jenner, Ronald A.. A critical study of the morphological data sets used for the most recent analyses of metazoan cladistics exposes a rather cavalier attitude towards character coding. Binary absence/presence coding is ubiquitous, but without any explicit justification. This uncompromising application of Boolean logic in character coding is remarkable since several recent investigations have nominated absence/presence coding as the most problematic coding method available for standard cladistic analysis. Moreover, the prevalence of unspecified “absence” character states in the published data sets introduces a discrepancy between the theoretical foundations of phylogenetic parsimony and current practices in metazoan cladistics. Because phylogenetic parsimony assumes... Tipo: Article / Letter to the editor Palavras-chave: Metazoan cladistics; Metazoa; Character coding; Character state identity; Boolean logic; Nonadditive binary coding; Absence/presence coding. Ano: 2002 URL: http://www.repository.naturalis.nl/record/534396 Registros recuperados: 2 Primeira ... 1 ... Última

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