Operator bias and replicability in comparative taphonomic studies
- Autores
- Do Nascimento Ritter, Matias; Francischini, Heitor; Kuhn, Lidia Aumond; Da Luz, Nathália Carvalho; Michels, Fernando Heck; De Morais, Anderson Luiz Martins; Paim, Protásio Antônio Vervloet; Xavier, Pedro Luis Ammon; de Francesco, Claudio German
- Año de publicación
- 2016
- Idioma
- español castellano
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The operator effect is a well-known analytical bias already quantified in some taphonomic studies. However, the influence of operator bias in the replicability on taphonomic studies has still not been considered. Here, we quantified for the first time this bias using different multivariate statistical techniques, testing if the operator effect is related to the replicability. We analyzed the results reported by 15 operators working on the same dataset. Each operator analyzed 30 bioclasts (bivalve shells) by site, from a total of five sites, considering the following taphonomic attributes: shell fragmentation, edge rounding, corrasion, bioerosion, and color alteration. The operator effect followed the same pattern reported in previous studies, characterized by a worse correspondence for those attributes having more than two levels of damage categories. However, the effect did not appear to have relation to replicability, because nearly all operators found differences among sites. The binary attribute bioerosion exhibited 83% of correspondence among operators, but at the same time it was the taphonomic attribute that showed the highest dispersion among operators (28%). Therefore, we concluded that binary attributes, despite indicating a reduction of the operator effect diminishes replicability, resulting in different interpretations of concordant data. We found that a variance value of nearly 8% among operators was enough to generate a different taphonomic interpretation, in a Q-mode cluster analysis. The results reported here showed that the statistical method employed influences the level of replicability and comparability of a study and that the availability of results may be a valid alternative to reduce bias.
Fil: Do Nascimento Ritter, Matias. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Francischini, Heitor. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Kuhn, Lidia Aumond. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Da Luz, Nathália Carvalho. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Michels, Fernando Heck. Universidade Federal do Rio Grande do Sul; Brasil
Fil: De Morais, Anderson Luiz Martins. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Paim, Protásio Antônio Vervloet. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Xavier, Pedro Luis Ammon. Universidade Federal do Rio Grande do Sul; Brasil
Fil: de Francesco, Claudio German. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina - Materia
-
ANALYTICAL BIAS
BIOCLASTS
STATISTICAL APPROACHES
TAPHONOMIC ATTRIBUTES - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/66792
Ver los metadatos del registro completo
id |
CONICETDig_311b5ccff29c47ffeff4517f68a2b90b |
---|---|
oai_identifier_str |
oai:ri.conicet.gov.ar:11336/66792 |
network_acronym_str |
CONICETDig |
repository_id_str |
3498 |
network_name_str |
CONICET Digital (CONICET) |
spelling |
Operator bias and replicability in comparative taphonomic studiesEl sesgo del operador en la replicabilidad de los estudios tafonómicos comparativosDo Nascimento Ritter, MatiasFrancischini, HeitorKuhn, Lidia AumondDa Luz, Nathália CarvalhoMichels, Fernando HeckDe Morais, Anderson Luiz MartinsPaim, Protásio Antônio VervloetXavier, Pedro Luis Ammonde Francesco, Claudio GermanANALYTICAL BIASBIOCLASTSSTATISTICAL APPROACHESTAPHONOMIC ATTRIBUTEShttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The operator effect is a well-known analytical bias already quantified in some taphonomic studies. However, the influence of operator bias in the replicability on taphonomic studies has still not been considered. Here, we quantified for the first time this bias using different multivariate statistical techniques, testing if the operator effect is related to the replicability. We analyzed the results reported by 15 operators working on the same dataset. Each operator analyzed 30 bioclasts (bivalve shells) by site, from a total of five sites, considering the following taphonomic attributes: shell fragmentation, edge rounding, corrasion, bioerosion, and color alteration. The operator effect followed the same pattern reported in previous studies, characterized by a worse correspondence for those attributes having more than two levels of damage categories. However, the effect did not appear to have relation to replicability, because nearly all operators found differences among sites. The binary attribute bioerosion exhibited 83% of correspondence among operators, but at the same time it was the taphonomic attribute that showed the highest dispersion among operators (28%). Therefore, we concluded that binary attributes, despite indicating a reduction of the operator effect diminishes replicability, resulting in different interpretations of concordant data. We found that a variance value of nearly 8% among operators was enough to generate a different taphonomic interpretation, in a Q-mode cluster analysis. The results reported here showed that the statistical method employed influences the level of replicability and comparability of a study and that the availability of results may be a valid alternative to reduce bias.Fil: Do Nascimento Ritter, Matias. Universidade Federal do Rio Grande do Sul; BrasilFil: Francischini, Heitor. Universidade Federal do Rio Grande do Sul; BrasilFil: Kuhn, Lidia Aumond. Universidade Federal do Rio Grande do Sul; BrasilFil: Da Luz, Nathália Carvalho. Universidade Federal do Rio Grande do Sul; BrasilFil: Michels, Fernando Heck. Universidade Federal do Rio Grande do Sul; BrasilFil: De Morais, Anderson Luiz Martins. Universidade Federal do Rio Grande do Sul; BrasilFil: Paim, Protásio Antônio Vervloet. Universidade Federal do Rio Grande do Sul; BrasilFil: Xavier, Pedro Luis Ammon. Universidade Federal do Rio Grande do Sul; BrasilFil: de Francesco, Claudio German. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaSociedade Brasileira de Paleontologia2016-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/66792Do Nascimento Ritter, Matias; Francischini, Heitor; Kuhn, Lidia Aumond; Da Luz, Nathália Carvalho; Michels, Fernando Heck; et al.; Operator bias and replicability in comparative taphonomic studies; Sociedade Brasileira de Paleontologia; Revista Brasileira de Paleontologia; 19; 3; 12-2016; 449-4641519-75302236-1715CONICET DigitalCONICETspainfo:eu-repo/semantics/altIdentifier/doi/10.4072/rbp.2016.3.10info:eu-repo/semantics/altIdentifier/url/http://www.sbpbrasil.org/revista/edicoes/19_3/10_Ritter%20et%20al_pg449a464_online.pdfinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:48:25Zoai:ri.conicet.gov.ar:11336/66792instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:48:25.54CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Operator bias and replicability in comparative taphonomic studies El sesgo del operador en la replicabilidad de los estudios tafonómicos comparativos |
title |
Operator bias and replicability in comparative taphonomic studies |
spellingShingle |
Operator bias and replicability in comparative taphonomic studies Do Nascimento Ritter, Matias ANALYTICAL BIAS BIOCLASTS STATISTICAL APPROACHES TAPHONOMIC ATTRIBUTES |
title_short |
Operator bias and replicability in comparative taphonomic studies |
title_full |
Operator bias and replicability in comparative taphonomic studies |
title_fullStr |
Operator bias and replicability in comparative taphonomic studies |
title_full_unstemmed |
Operator bias and replicability in comparative taphonomic studies |
title_sort |
Operator bias and replicability in comparative taphonomic studies |
dc.creator.none.fl_str_mv |
Do Nascimento Ritter, Matias Francischini, Heitor Kuhn, Lidia Aumond Da Luz, Nathália Carvalho Michels, Fernando Heck De Morais, Anderson Luiz Martins Paim, Protásio Antônio Vervloet Xavier, Pedro Luis Ammon de Francesco, Claudio German |
author |
Do Nascimento Ritter, Matias |
author_facet |
Do Nascimento Ritter, Matias Francischini, Heitor Kuhn, Lidia Aumond Da Luz, Nathália Carvalho Michels, Fernando Heck De Morais, Anderson Luiz Martins Paim, Protásio Antônio Vervloet Xavier, Pedro Luis Ammon de Francesco, Claudio German |
author_role |
author |
author2 |
Francischini, Heitor Kuhn, Lidia Aumond Da Luz, Nathália Carvalho Michels, Fernando Heck De Morais, Anderson Luiz Martins Paim, Protásio Antônio Vervloet Xavier, Pedro Luis Ammon de Francesco, Claudio German |
author2_role |
author author author author author author author author |
dc.subject.none.fl_str_mv |
ANALYTICAL BIAS BIOCLASTS STATISTICAL APPROACHES TAPHONOMIC ATTRIBUTES |
topic |
ANALYTICAL BIAS BIOCLASTS STATISTICAL APPROACHES TAPHONOMIC ATTRIBUTES |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
The operator effect is a well-known analytical bias already quantified in some taphonomic studies. However, the influence of operator bias in the replicability on taphonomic studies has still not been considered. Here, we quantified for the first time this bias using different multivariate statistical techniques, testing if the operator effect is related to the replicability. We analyzed the results reported by 15 operators working on the same dataset. Each operator analyzed 30 bioclasts (bivalve shells) by site, from a total of five sites, considering the following taphonomic attributes: shell fragmentation, edge rounding, corrasion, bioerosion, and color alteration. The operator effect followed the same pattern reported in previous studies, characterized by a worse correspondence for those attributes having more than two levels of damage categories. However, the effect did not appear to have relation to replicability, because nearly all operators found differences among sites. The binary attribute bioerosion exhibited 83% of correspondence among operators, but at the same time it was the taphonomic attribute that showed the highest dispersion among operators (28%). Therefore, we concluded that binary attributes, despite indicating a reduction of the operator effect diminishes replicability, resulting in different interpretations of concordant data. We found that a variance value of nearly 8% among operators was enough to generate a different taphonomic interpretation, in a Q-mode cluster analysis. The results reported here showed that the statistical method employed influences the level of replicability and comparability of a study and that the availability of results may be a valid alternative to reduce bias. Fil: Do Nascimento Ritter, Matias. Universidade Federal do Rio Grande do Sul; Brasil Fil: Francischini, Heitor. Universidade Federal do Rio Grande do Sul; Brasil Fil: Kuhn, Lidia Aumond. Universidade Federal do Rio Grande do Sul; Brasil Fil: Da Luz, Nathália Carvalho. Universidade Federal do Rio Grande do Sul; Brasil Fil: Michels, Fernando Heck. Universidade Federal do Rio Grande do Sul; Brasil Fil: De Morais, Anderson Luiz Martins. Universidade Federal do Rio Grande do Sul; Brasil Fil: Paim, Protásio Antônio Vervloet. Universidade Federal do Rio Grande do Sul; Brasil Fil: Xavier, Pedro Luis Ammon. Universidade Federal do Rio Grande do Sul; Brasil Fil: de Francesco, Claudio German. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina |
description |
The operator effect is a well-known analytical bias already quantified in some taphonomic studies. However, the influence of operator bias in the replicability on taphonomic studies has still not been considered. Here, we quantified for the first time this bias using different multivariate statistical techniques, testing if the operator effect is related to the replicability. We analyzed the results reported by 15 operators working on the same dataset. Each operator analyzed 30 bioclasts (bivalve shells) by site, from a total of five sites, considering the following taphonomic attributes: shell fragmentation, edge rounding, corrasion, bioerosion, and color alteration. The operator effect followed the same pattern reported in previous studies, characterized by a worse correspondence for those attributes having more than two levels of damage categories. However, the effect did not appear to have relation to replicability, because nearly all operators found differences among sites. The binary attribute bioerosion exhibited 83% of correspondence among operators, but at the same time it was the taphonomic attribute that showed the highest dispersion among operators (28%). Therefore, we concluded that binary attributes, despite indicating a reduction of the operator effect diminishes replicability, resulting in different interpretations of concordant data. We found that a variance value of nearly 8% among operators was enough to generate a different taphonomic interpretation, in a Q-mode cluster analysis. The results reported here showed that the statistical method employed influences the level of replicability and comparability of a study and that the availability of results may be a valid alternative to reduce bias. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-12 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/66792 Do Nascimento Ritter, Matias; Francischini, Heitor; Kuhn, Lidia Aumond; Da Luz, Nathália Carvalho; Michels, Fernando Heck; et al.; Operator bias and replicability in comparative taphonomic studies; Sociedade Brasileira de Paleontologia; Revista Brasileira de Paleontologia; 19; 3; 12-2016; 449-464 1519-7530 2236-1715 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/66792 |
identifier_str_mv |
Do Nascimento Ritter, Matias; Francischini, Heitor; Kuhn, Lidia Aumond; Da Luz, Nathália Carvalho; Michels, Fernando Heck; et al.; Operator bias and replicability in comparative taphonomic studies; Sociedade Brasileira de Paleontologia; Revista Brasileira de Paleontologia; 19; 3; 12-2016; 449-464 1519-7530 2236-1715 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
spa |
language |
spa |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.4072/rbp.2016.3.10 info:eu-repo/semantics/altIdentifier/url/http://www.sbpbrasil.org/revista/edicoes/19_3/10_Ritter%20et%20al_pg449a464_online.pdf |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Paleontologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Paleontologia |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
_version_ |
1844613504174129152 |
score |
13.070432 |