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Chi-Square Test of Biological Space Curve Affinities

  • David Dean
  • Leslie F. Marcus
  • Fred L. Bookstein
Chapter
Part of the NATO ASI Series book series (NSSA, volume 284)

Abstract

This project attempts a discrimination of craniofacial shape between Pleistocene and recent humans. In this study three-dimensional craniofacial line tracings, referred to here as ridge curves, were surveyed. By means of a chi-square model, ridge curves taken from fossil specimens considered “transitional” were compared with homologous “average” ridge curves generated from Homo erectus and modern humans, H. sapiens sapiens. Results showed that only two of the five ridge curves, the medial brow and the nuchal torus, were useful in discriminating between these forms and determining the transitional specimens’ affinities. For these two ridge curves the Middle Pleistocene forms showed overwhelming similarity with modern humans. The nature of the separation for the two significant ridge curves was studied with a principal coordinates analysis. This study supports the assignment of Middle Pleistocene transitional specimens to “early” H. sapiens rather than to H. erectus (Dean, 1993).

Keywords

Registration Point Ridge Curve External Occipital Protuberance Craniofacial Shape Superior Nuchal Line 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • David Dean
    • 1
  • Leslie F. Marcus
    • 2
    • 3
  • Fred L. Bookstein
    • 4
  1. 1.Department of AnatomyCase Western Reserve UniversityClevelandUSA
  2. 2.Department of BiologyQueens College of The City University of New YorkNew YorkUSA
  3. 3.Department of InvertebratesAmerican Museum of Natural HistoryNew YorkUSA
  4. 4.Institute of GerontologyUniversity of MichiganAnn ArborUSA

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