Evaluating causes of error in landmark-based data collection using scanners

PloS One
Brian M ShearerMelissa Tallman

Abstract

In this study, we assess the precision, accuracy, and repeatability of craniodental landmarks (Types I, II, and III, plus curves of semilandmarks) on a single macaque cranium digitally reconstructed with three different surface scanners and a microCT scanner. Nine researchers with varying degrees of osteological and geometric morphometric knowledge landmarked ten iterations of each scan (40 total) to test the effects of scan quality, researcher experience, and landmark type on levels of intra- and interobserver error. Two researchers additionally landmarked ten specimens from seven different macaque species using the same landmark protocol to test the effects of the previously listed variables relative to species-level morphological differences (i.e., observer variance versus real biological variance). Error rates within and among researchers by scan type were calculated to determine whether or not data collected by different individuals or on different digitally rendered crania are consistent enough to be used in a single dataset. Results indicate that scan type does not impact rate of intra- or interobserver error. Interobserver error is far greater than intraobserver error among all individuals, and is similar in variance to...Continue Reading

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Citations

Oct 27, 2018·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Sebastian K T S WärmländerSabrina B Sholts
Mar 5, 2019·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Marta Revilla-LeónAmirali Zandinejad
Sep 10, 2019·Journal of Forensic Sciences·Chelsea Cataldo-RamirezLuis Cabo
Oct 3, 2019·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Diana TonevaNikolai Lazarov
Jun 7, 2020·International Journal of Legal Medicine·Andreas BertsatosŠárka Bejdová
Aug 15, 2018·Proceedings of the National Academy of Sciences of the United States of America·Peter J FernándezWilliam L Jungers
Oct 22, 2019·American Journal of Physical Anthropology·Tommaso Mori, Katerina Harvati
Nov 2, 2019·Journal of Human Evolution·Lawrence M FaticaAshley S Hammond
Nov 5, 2020·Journal of Anatomy·Katharine L Balolia, Jason S Massey
May 29, 2021·Integrative Zoology·Giada GiacominiCarlo Meloro
Jul 24, 2021·International Journal of Paleopathology·Samuel BédécarratsHélène Coqueugniot

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Methods Mentioned

BETA
PCA

Software Mentioned

NextEngine
PRIMO
Microscribe
Procrustes
Landmark Editor
PAST
geomorph package for R
morphologika
MorphoJ
Wrap i

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