Application of the multiple imputations method in the morphometric study of theropod teeth
- Autores
- Meso, Jorge G.; Baiano, Mattia Antonio; Archuby, Fernando Miguel; Canale, Juan Ignacio; Salgado, Leonardo
- Año de publicación
- 2018
- Idioma
- inglés
- Tipo de recurso
- documento de conferencia
- Estado
- versión aceptada
- Descripción
- Fil: Meso, Jorge G. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina.
Fil: Meso, Jorge G. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.
Fil: Baiano, Mattia Antonio. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina.
Fil: Baiano, Mattia Antonio. Museo “Carmen Funes”. Nuequén, Argentina.
Fil: Archuby, Fernando. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina.
Fil: Archuby, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.
Fil: Canale, Juan Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.
Fil: Canale, Juan Ignacio. Museo Paleontológico “Ernesto Bachmann”. Neuquén, Argentina.
Fil: Salgado, Leonardo. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina.
Fil: Salgado, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.
number of qualitative and quantitative parameters began to be established and systematized, with the aim of achieving a more precise classification of isolated theropod teeth. Due to exposure of these materials to taphonomic processes, the missing data arerelatively common in the study of these elements. Such loss of information can lead to a drastic reduction of the original dataset, and therefore to biased conclusions. Currently, few statistical programs are available that allow the direct use of incomplete data sets to perform different multivariate methods, but all of them show a low statistical power. The objective of this work is to evaluate the quality of a database obtained after the application of the multiple imputation method to recover lost data. The most common approaches to deal with missing data have different consequences on the dataset and hence on the results of the analysis. "Casewise/variable deletion" consists on removin the specimens or variables that have missing values. In “Mean value imputation” missing values are replaced by their column average, resulting in a reduction of variation and an artificial increase in the power of tests. In the method of “Iterative imputation”, missing values are initially replaced by their column average. An initial PCA run is then used to compute regression values for the missing data. The procedure is iterated until convergence. The results obtained suggest this method provides a better resolution for the identification of isolated teeth. - Materia
-
Paleontología
Theropod Teeth
Mesozoic
Paleontología
Paleontología - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de Río Negro
- OAI Identificador
- oai:rid.unrn.edu.ar:20.500.12049/6117
Ver los metadatos del registro completo
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Application of the multiple imputations method in the morphometric study of theropod teethMeso, Jorge G.Baiano, Mattia AntonioArchuby, Fernando MiguelCanale, Juan IgnacioSalgado, LeonardoPaleontologíaTheropod TeethMesozoicPaleontologíaPaleontologíaFil: Meso, Jorge G. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina.Fil: Meso, Jorge G. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.Fil: Baiano, Mattia Antonio. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina.Fil: Baiano, Mattia Antonio. Museo “Carmen Funes”. Nuequén, Argentina.Fil: Archuby, Fernando. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina.Fil: Archuby, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.Fil: Canale, Juan Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.Fil: Canale, Juan Ignacio. Museo Paleontológico “Ernesto Bachmann”. Neuquén, Argentina.Fil: Salgado, Leonardo. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina.Fil: Salgado, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.number of qualitative and quantitative parameters began to be established and systematized, with the aim of achieving a more precise classification of isolated theropod teeth. Due to exposure of these materials to taphonomic processes, the missing data arerelatively common in the study of these elements. Such loss of information can lead to a drastic reduction of the original dataset, and therefore to biased conclusions. Currently, few statistical programs are available that allow the direct use of incomplete data sets to perform different multivariate methods, but all of them show a low statistical power. The objective of this work is to evaluate the quality of a database obtained after the application of the multiple imputation method to recover lost data. The most common approaches to deal with missing data have different consequences on the dataset and hence on the results of the analysis. "Casewise/variable deletion" consists on removin the specimens or variables that have missing values. In “Mean value imputation” missing values are replaced by their column average, resulting in a reduction of variation and an artificial increase in the power of tests. In the method of “Iterative imputation”, missing values are initially replaced by their column average. An initial PCA run is then used to compute regression values for the missing data. The procedure is iterated until convergence. The results obtained suggest this method provides a better resolution for the identification of isolated teeth.2018-05-14info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfhttps://www.peapaleontologica.org.ar/index.php/peapa/article/view/295/355http://rid.unrn.edu.ar/handle/20.500.12049/6117engXXXII Jornadas Argentinas de Paleontología de Vertebrados & VII Jornadas Tecnicas de Paleontología de Vertebradosinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/4.0/reponame:RID-UNRN (UNRN)instname:Universidad Nacional de Río Negro2025-09-29T14:29:25Zoai:rid.unrn.edu.ar:20.500.12049/6117instacron:UNRNInstitucionalhttps://rid.unrn.edu.ar/jspui/Universidad públicaNo correspondehttps://rid.unrn.edu.ar/oai/snrdrid@unrn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:43692025-09-29 14:29:26.176RID-UNRN (UNRN) - Universidad Nacional de Río Negrofalse |
dc.title.none.fl_str_mv |
Application of the multiple imputations method in the morphometric study of theropod teeth |
title |
Application of the multiple imputations method in the morphometric study of theropod teeth |
spellingShingle |
Application of the multiple imputations method in the morphometric study of theropod teeth Meso, Jorge G. Paleontología Theropod Teeth Mesozoic Paleontología Paleontología |
title_short |
Application of the multiple imputations method in the morphometric study of theropod teeth |
title_full |
Application of the multiple imputations method in the morphometric study of theropod teeth |
title_fullStr |
Application of the multiple imputations method in the morphometric study of theropod teeth |
title_full_unstemmed |
Application of the multiple imputations method in the morphometric study of theropod teeth |
title_sort |
Application of the multiple imputations method in the morphometric study of theropod teeth |
dc.creator.none.fl_str_mv |
Meso, Jorge G. Baiano, Mattia Antonio Archuby, Fernando Miguel Canale, Juan Ignacio Salgado, Leonardo |
author |
Meso, Jorge G. |
author_facet |
Meso, Jorge G. Baiano, Mattia Antonio Archuby, Fernando Miguel Canale, Juan Ignacio Salgado, Leonardo |
author_role |
author |
author2 |
Baiano, Mattia Antonio Archuby, Fernando Miguel Canale, Juan Ignacio Salgado, Leonardo |
author2_role |
author author author author |
dc.subject.none.fl_str_mv |
Paleontología Theropod Teeth Mesozoic Paleontología Paleontología |
topic |
Paleontología Theropod Teeth Mesozoic Paleontología Paleontología |
dc.description.none.fl_txt_mv |
Fil: Meso, Jorge G. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina. Fil: Meso, Jorge G. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina. Fil: Baiano, Mattia Antonio. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina. Fil: Baiano, Mattia Antonio. Museo “Carmen Funes”. Nuequén, Argentina. Fil: Archuby, Fernando. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina. Fil: Archuby, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina. Fil: Canale, Juan Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina. Fil: Canale, Juan Ignacio. Museo Paleontológico “Ernesto Bachmann”. Neuquén, Argentina. Fil: Salgado, Leonardo. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina. Fil: Salgado, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina. number of qualitative and quantitative parameters began to be established and systematized, with the aim of achieving a more precise classification of isolated theropod teeth. Due to exposure of these materials to taphonomic processes, the missing data arerelatively common in the study of these elements. Such loss of information can lead to a drastic reduction of the original dataset, and therefore to biased conclusions. Currently, few statistical programs are available that allow the direct use of incomplete data sets to perform different multivariate methods, but all of them show a low statistical power. The objective of this work is to evaluate the quality of a database obtained after the application of the multiple imputation method to recover lost data. The most common approaches to deal with missing data have different consequences on the dataset and hence on the results of the analysis. "Casewise/variable deletion" consists on removin the specimens or variables that have missing values. In “Mean value imputation” missing values are replaced by their column average, resulting in a reduction of variation and an artificial increase in the power of tests. In the method of “Iterative imputation”, missing values are initially replaced by their column average. An initial PCA run is then used to compute regression values for the missing data. The procedure is iterated until convergence. The results obtained suggest this method provides a better resolution for the identification of isolated teeth. |
description |
Fil: Meso, Jorge G. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-05-14 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/conferenceObject info:eu-repo/semantics/acceptedVersion http://purl.org/coar/resource_type/c_5794 info:ar-repo/semantics/documentoDeConferencia |
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conferenceObject |
status_str |
acceptedVersion |
dc.identifier.none.fl_str_mv |
https://www.peapaleontologica.org.ar/index.php/peapa/article/view/295/355 http://rid.unrn.edu.ar/handle/20.500.12049/6117 |
url |
https://www.peapaleontologica.org.ar/index.php/peapa/article/view/295/355 http://rid.unrn.edu.ar/handle/20.500.12049/6117 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
XXXII Jornadas Argentinas de Paleontología de Vertebrados & VII Jornadas Tecnicas de Paleontología de Vertebrados |
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info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/4.0/ |
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