Glossary of "Cladistics (2nd ed.)" by Kitching et al. (1998)
- A procedure for weighting characters according to their fit to a cladogram, assessed as the implied number of extra steps. The fitting function is generally concave, which gives more weight to those characters with least homoplasy. See also successive (approximations character) weighting.
- Kitching, I. J., Forey, P. L. Humphries, C. J. & Williams, D. M. 1998. Cladistics, 2nd ed.: the Theory and Practice of Parsimony Analysis. -xii + 228 pp. Oxford University Press, New York.