PubMed · 14179957
The source did not provide an abstract. Follow the original record for more information.
Explore connections, maps & timelines
T LORENTZ, D DURBACH, S LOPIS, L KLUGMAN. 1964-07-11. SINGLE THYROID NODULES.. https://pubmed.ncbi.nlm.nih.gov/14179957/
Cite the original work for its findings. Save a collection to share your selection of sources.
KEEP EXPLORING
Category knowledge allows for both the determination of category membership and an understanding of what the members of a category are like. Diagnostic information is used to determine category membership; prototypical information reflects the most likely features given category membership. Two experiments examined 2 means of category learning, classification and inference learning, in terms of sensitivity to diagnostic and prototypical information. Classification learners were highly sensitive to diagnostic features but not sensitive to nondiagnostic, but prototypical, features. Inference learners were less sensitive to the diagnostic features than were classification learners and were also sensitive to the nondiagnostic, prototypical, features. Discussion focuses on aspects of the 2 learning tasks that might lead to this differential sensitivity and the implications for learning real-world categories.
The influence of nonindependence among sites on phylogenetic reconstructions and bootstrap scores was investigated both analytically and empirically. First, the sampling properties of the bootstrap support in the four-species case was derived for the maximum-parsimony method, assuming either independently or nonindependently evolving sites. The influence of various models of departure from the independence assumption was quantified. Second, trees and bootstrap scores estimated from subsets of consecutive (potentially coevolving) versus dispersed (presumably independent) sites of a ribosomal RNA data set were contrasted. The two approaches consistently suggest that a departure from the assumption of independent sites tends to reduce the amount of phylogenetic information contained in the data, but to increase the apparent statistical support for reconstructed trees, as measured by the bootstrap. In particular, nonindependence can lead to strongly supported wrong internal branches.
In conformity with the nomenclature of the genus Rhizobium published by Young et al. (Int J Syst Evol Microbiol 51, 89-103, 2001), it is proposed that Agrobacterium larrymoorei be named as Rhizobium larrymoorei comb. nov.