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dc.contributor.author
Do Nascimento Ritter, Matias  
dc.contributor.author
Francischini, Heitor  
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Kuhn, Lidia Aumond  
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Da Luz, Nathália Carvalho  
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Michels, Fernando Heck  
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De Morais, Anderson Luiz Martins  
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Paim, Protásio Antônio Vervloet  
dc.contributor.author
Xavier, Pedro Luis Ammon  
dc.contributor.author
de Francesco, Claudio German  
dc.date.available
2018-12-19T19:10:17Z  
dc.date.issued
2016-12  
dc.identifier.citation
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  
dc.identifier.issn
1519-7530  
dc.identifier.uri
http://hdl.handle.net/11336/66792  
dc.description.abstract
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.  
dc.format
application/pdf  
dc.language.iso
spa  
dc.publisher
Sociedade Brasileira de Paleontologia  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Analytical Bias  
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Bioclasts  
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Statistical Approaches  
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Taphonomic Attributes  
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Meteorología y Ciencias Atmosféricas  
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Ciencias de la Tierra y relacionadas con el Medio Ambiente  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Operator bias and replicability in comparative taphonomic studies  
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El sesgo del operador en la replicabilidad de los estudios tafonómicos comparativos  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2018-11-05T19:16:51Z  
dc.identifier.eissn
2236-1715  
dc.journal.volume
19  
dc.journal.number
3  
dc.journal.pagination
449-464  
dc.journal.pais
Brasil  
dc.journal.ciudad
Porto Alegre  
dc.description.fil
Fil: Do Nascimento Ritter, Matias. Universidade Federal do Rio Grande do Sul; Brasil  
dc.description.fil
Fil: Francischini, Heitor. Universidade Federal do Rio Grande do Sul; Brasil  
dc.description.fil
Fil: Kuhn, Lidia Aumond. Universidade Federal do Rio Grande do Sul; Brasil  
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Fil: Da Luz, Nathália Carvalho. Universidade Federal do Rio Grande do Sul; Brasil  
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Fil: Michels, Fernando Heck. Universidade Federal do Rio Grande do Sul; Brasil  
dc.description.fil
Fil: De Morais, Anderson Luiz Martins. Universidade Federal do Rio Grande do Sul; Brasil  
dc.description.fil
Fil: Paim, Protásio Antônio Vervloet. Universidade Federal do Rio Grande do Sul; Brasil  
dc.description.fil
Fil: Xavier, Pedro Luis Ammon. Universidade Federal do Rio Grande do Sul; Brasil  
dc.description.fil
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  
dc.journal.title
Revista Brasileira de Paleontologia  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.4072/rbp.2016.3.10  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sbpbrasil.org/revista/edicoes/19_3/10_Ritter%20et%20al_pg449a464_online.pdf