Alberto Martín-Martín

Alberto Martín-Martín
University of Granada | UGR · Departamento de Información y Comunicación

About

91
Publications
189,372
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2,249
Citations

Publications

Publications (91)
Preprint
Full-text available
RESUMEN La pretensión de este trabajo es descubrir si en los últimos años en España se han producido cambios sustanciales en sus patrones de publicación científica; más concretamente, en los medios de comunicación (editoriales y revistas) empleados para difundir los resultados de la investigación y en la tipología de publicaciones utilizadas. El es...
Article
The information sources that are often used to monitor and to obtain a better understanding of the system of scholarly communication (such as Web of Science, Scopus, and Google Scholar) have historically been distributed under restrictive use licenses. However, in a scenario where science and scientific communication are undergoing a process of dig...
Preprint
Full-text available
Unlike other academic bibliographic databases, Google Scholar intentionally operates in a way that does not maintain coverage stability: documents that stop being available to Google Scholar's crawlers are removed from the system. This can also affect Google Scholar's citation graph (citation counts can decrease). Furthermore, because Google Schola...
Article
New sources of citation data have recently become available, such as Microsoft Academic, Dimensions, and the OpenCitations Index of CrossRef open DOI-to-DOI citations (COCI). Although these have been compared to the Web of Science Core Collection (WoS), Scopus, or Google Scholar, there is no systematic evidence of their differences across subject c...
Preprint
Full-text available
New sources of citation data have recently become available, such as Microsoft Academic, Dimensions, and the OpenCitations Index of CrossRef open DOI-to-DOI citations (COCI). Although these have been compared to the Web of Science (WoS), Scopus, or Google Scholar, there is no systematic evidence of their differences across subject categories. In re...
Preprint
Full-text available
SUMARIO 1. El caso: anatomía del preprint viral publicado en bioRxiv 2. El impacto mediático del preprint: viralidad de la ciencia escandalosa 3. El impacto científico del preprint: el castigo del olvido 4. Las lecciones de este caso: reflexionando sobre los nuevos retos de la comunicación científica 4.1 Abriendo de par en par las puertas del peer...
Preprint
Full-text available
RESUMEN El objetivo de este ensayo es responder a la pregunta de por qué seguimos empleando en España el Factor de Impacto (FI) y demás indicadores bibliométricos de recuentos de citas para evaluar el rendimiento de científicos e instituciones. A pesar del nacimiento en las dos últimas décadas de nuevas fuentes de datos de citación e indicadores bi...
Article
Full-text available
Being able to find, assess and place new research within a field of knowledge, is integral to any research project. For social scientists this process is increasingly likely to take place on Google Scholar, closely followed by traditional scholarly databases. In this post, we analyse the relative coverage of the three main research databases, Googl...
Technical Report
Full-text available
Se presentan listados por campos científicos y disciplinas de las revistas científicas españolas que figuran en Google Scholar Metrics (GSM). Se ordenan de acuerdo con el índice h que es el indicador bibliométrico adoptado por Google. Se pretende con este trabajo comprobar la amplitud en la cobertura que posee Google Scholar Metrics de las revistas...
Technical Report
Full-text available
Se presentan rankings por campos científicos y disciplinas de las revistas científicas españolas que figuran en Google Scholar Metrics (GSM). Se ordenan de acuerdo con el índice h que es el indicador bibliométrico adoptado por Google. Se pretende con este trabajo comprobar la amplitud en la cobertura que posee Google Scholar Metrics de las revistas...
Article
Full-text available
Despite citation counts from Google Scholar (GS), Web of Science (WoS), and Scopus being widely consulted by researchers and sometimes used in research evaluations, there is no recent or systematic evidence about the differences between them. In response, this paper investigates 2,448,055 citations to 2299 English-language highly-cited documents fr...
Technical Report
Full-text available
The aim of this report is to present a ranking of Sports science journals covered in Google Scholar Metrics (GSM) for the period 2013-2017). Google Scholar Metrics does not currently allow to group and sort all journals belonging to a scientific discipline. Therefore, in an attempt to overcome this limitation, we have used the diversity of search p...
Presentation
Full-text available
This presentation contains the contents of the conference paper presented at STI Conference, held in Leiden (Netherlands). The main goal of the presentation is to assess whether Google Scholar’s Classic Papers can be used reliably for identifying highly-cited documents. Additionally, specific strengths and shortcomings are highlighted. The use of...
Preprint
Full-text available
In June 2017 Google Scholar launched a new product called Classic Papers. This service currently displays the most cited English-language original research articles by fields and published in 2006. The main goal of this work is to describe the main characteristics and features of this Google Scholar’s new service, as well as to highlight its main s...
Preprint
Despite citation counts from Google Scholar (GS), Web of Science (WoS), and Scopus being widely consulted by researchers and sometimes used in research evaluations, there is no recent or systematic evidence about the differences between them. In response, this paper investigates 2,448,055 citations to 2,299 English-language highly-cited documents f...
Article
Full-text available
This article uses Google Scholar (GS) as a source of data to analyse Open Access (OA) levels across all countries and fields of research. All articles and reviews with a DOI and published in 2009 or 2014 and covered by the three main citation indexes in the Web of Science (2,269,022 documents) were selected for study. The links to freely available...
Technical Report
Full-text available
The 2015 edition of Google Scholar Metrics was released on Juny 25 th 2015. There haven't been any structural changes respect to previous versions, which means that most of its limitations still persist. Continuity and stability are the norm in this edition. The total number of publications that can be visualized in the 2015 rankings is 7,211. Now,...
Article
Full-text available
This study explores the extent to which bibliometric indicators based on counts of highly-cited documents could be affected by the choice of data source. The initial hypothesis is that databases that rely on journal selection criteria for their document coverage may not necessarily provide an accurate representation of highly-cited documents across...
Preprint
The launch of Google Scholar back in 2004 meant a revolution not only in the scientific information search market but also in research evaluation processes. Its dynamism, unparalleled coverage, and uncontrolled indexing make of Google Scholar an unusual product, especially when compared to traditional bibliographic databases. Conceived primarily as...
Preprint
Full-text available
The current ways in which documents are made freely accessible in the Web no longer adhere to the models established Budapest/Bethesda/Berlin (BBB) definitions of Open Access (OA). Since those definitions were established, OA-related terminology has expanded, trying to keep up with all the variants of OA publishing that are out there. However, the...
Preprint
Full-text available
This paper describes the creation of “Scholar Mirrors”, a prototype web application that aims to provide a quick but accurate representation of the situation of a scientific discipline by integrating data from multiple online platforms. We chose the discipline of Bibliometrics / Scientometrics as a case study. After carrying out a series of keyword...
Preprint
The current ways in which documents are made freely accessible in the Web no longer adhere to the models established Budapest/Bethesda/Berlin (BBB) definitions of Open Access (OA). Since those definitions were established, OA-related terminology has expanded, trying to keep up with all the variants of OA publishing that are out there. However, the...
Preprint
Full-text available
The launch of Google Scholar (GS) marked the beginning of a revolution in the scientific information market. This search engine, unlike traditional databases, automatically indexes information from the academic web. Its ease of use, together with its wide coverage and fast indexing speed, have made it the first tool most scientists currently turn t...
Conference Paper
Full-text available
The current ways in which documents are made freely accessible in the Web no longer adhere to the models established Budapest/Bethesda/Berlin (BBB) definitions of Open Access (OA). Since those definitions were established, OA-related terminology has expanded, trying to keep up with all the variants of OA publishing that are out there. However, the...
Presentation
Full-text available
Google Scholar contains a vast wealth of citation data, but this data is not easily accessible. This slides present some of the main strengths and weaknesses of Google Scholar citation data, as compared to the citation databases that are most frequently used for bibliometric analyses (Web of Science and Scopus). It also describes our own workflow t...
Preprint
Full-text available
This study explores the extent to which bibliometric indicators based on counts of highly-cited documents could be affected by the choice of data source. The initial hypothesis is that databases that rely on journal selection criteria for their document coverage may not necessarily provide an accurate representation of highly-cited documents across...
Preprint
This study explores the extent to which bibliometric indicators based on counts of highly-cited documents could be affected by the choice of data source. The initial hypothesis is that databases that rely on journal selection criteria for their document coverage may not necessarily provide an accurate representation of highly-cited documents across...
Preprint
An abrupt drop in the number of Spanish scientific journals covered in the last edition of Google Scholar Metrics (2012-2016) has been detected. The total count decreased from 1,101 in the 2011-2015 edition, to 599 in the 2012-2016 edition. An analysis by disciplines is carried out to detect which ones have been affected the most. After considering...
Article
Full-text available
The new web-based academic communication platforms do not only enable researchers to better advertise their academic outputs, making them more visible than ever before, but they also provide a wide supply of metrics to help authors better understand the impact their work is making. This study has three objectives: a) to analyse the uptake of some o...
Preprint
This article uses Google Scholar (GS) as a source of data to analyse Open Access (OA) levels across all countries and fields of research. All articles and reviews with a DOI and published in 2009 or 2014 and covered by the three main citation indexes in the Web of Science (2,269,022 documents) were selected for study. The links to freely available...
Preprint
Full-text available
The launch of Google Scholar (GS) marked the beginning of a revolution in the scientific information market. This search engine, unlike traditional databases, automatically indexes information from the academic web. Its ease of use, together with its wide coverage and fast indexing speed, have made it the first tool most scientists currently turn t...
Technical Report
Full-text available
Rankings are presented by scientific fields and disciplines of Spanish scientific journals listed in Google Scholar Metrics (GSM). They are sorted according to the h-index. It pretends with this work to test the breadth of coverage that has Google Scholar Metrics of Spanish scientific journals. The two criteria used by Google Scholar Metrics to inc...
Article
Full-text available
This article describes a procedure to generate a snapshot of the structure of a specific scientific community and their outputs based on the information available in Google Scholar Citations (GSC). We call this method multifaceted analysis of disciplines through academic profiles (MADAP). The international community of researchers working in Biblio...
Article
Full-text available
Google Scholar (GS) is an academic search engine and discovery tool launched by Google (now Alphabet) in November 2004. The fact that GS provides the number of citations received by each article from all other indexed articles (regardless of their source) has led to its use in bibliometric analysis and academic assessment tasks, especially in socia...
Chapter
Full-text available
The launch of Google Scholar back in 2004 meant a revolution not only in the scientific information search market but also in research evaluation processes. Its dynamism, unparalleled coverage, and uncontrolled indexing make of Google Scholar an unusual product, especially when compared to traditional bibliographic databases. Conceived primarily as...
Preprint
Full-text available
This paper describes the creation of “Journal Scholar Metrics” (JSM), a prototype web application that ranks journals in the areas of Arts, Humanities, and Social Sciences (AH&SS) on the basis of the citations their articles have received according to Google Scholar Metrics (GSM). To identify as many AH&SS journals as possible, a master list of 66,...
Presentation
Full-text available
Since its launch in 2004, Google Scholar has become the tool of choice for most researchers worldwide to carry out searches of academic literature. In addition to that, the -for the first time free- availability of a massive amount of citation data raised the question of the suitability of this tool for citation-based analyses. In this seminar I wi...
Conference Paper
Full-text available
This paper describes the creation of " Journal Scholar Metrics " (JSM), a prototype web application that ranks journals in the areas of Arts, Humanities, and Social Sciences (AH&SS) on the basis of the citations their articles have received according to Google Scholar Metrics (GSM). To identify as many AH&SS journals as possible, a master list of 6...
Article
Full-text available
Purpose Google Scholar Citations (GSC) provides an institutional affiliation link which groups together authors who belong to the same institution. The purpose of this work is to ascertain whether this feature is able to identify and normalize all the institutions entered by the authors, and whether it is able to assign all researchers to their ow...
Poster
Full-text available
The objective of this work is to present a prototype web application (Scholar Mirrors which collects mainly author-level indicators from several of academic and social platforms for a specific community of researchers (in this case, the Bibliometrics/Scientometrics community).
Data
List of top ten most cited papers published in 2006 in 252 disciplines. Total number of articles: 2515
Article
Full-text available
The academic social network site ResearchGate (RG) has its own indicator, RG Score, for its members. The high profile nature of the site means that the RG Score may be used for recruitment, promotion and other tasks for which researchers are evaluated. In response, this study investigates whether it is reasonable to employ the RG Score as evidence...
Preprint
Full-text available
Academic profiling services are a pervasive feature of scholarly life. Alberto Martín-Martín, Enrique Orduna-Malea and Emilio Delgado López-Cózar discuss the advantages and disadvantages of major profile platforms and look at the role of ego in how these services are built and used. Scholars validate these services by using them and should be aware...
Presentation
Full-text available
The two faces of Google Scholar Opening the academic Pandora’s Box Why do we call it a big data bibliometric tool? Drawbacks Google Scholar, Google Scholar Citations, Google Scholar Metrics
Working Paper
Full-text available
Recently, a review concluded that Google Scholar (GS) is not a suitable source of information "for identifying recent conference papers or other gray literature publications". The goal of this letter is to demonstrate that GS can be an effective tool to search and find gray literature, as long as appropriate search strategies are used. To do this,...
Article
Full-text available
Recently, a review concluded that Google Scholar (GS) is not a suitable source of information "for identifying recent conference papers or other gray literature publications". The goal of this letter is to demonstrate that GS can be an effective tool to search and find gray literature, as long as appropriate search strategies are used. To do this,...
Article
Full-text available
The main objective of this paper is to empirically test whether the identification of highly-cited documents through Google Scholar is feasible and reliable. To this end, we carried out a longitudinal analysis (1950 to 2013), running a generic query (filtered only by year of publication) to minimise the effects of academic search engine optimisatio...
Presentation
Full-text available
Presentación utilizada en el curso de doctorado impartido en la Escuela de Doctorado de Humanidades, Ciencias Sociales y Jurídicas de la Universidad de Granada destinado a enseñar a los doctorandos cómo buscar y gestionar la bibliografía de su tesis. Los contenidos desarrollados son los siguientes: 1. La elaboración de una estrategia de búsqueda 2....
Data
This file contains the supplementary data to the article entitled "Do ResearchGate Scores create ghost academic reputations?", accepted for its publication in Scientometrics. TABLE OF CONTENTS: Appendix A. Outlier authors ..................................................................................... 2 Appendix B Excellence authors ...........
Data
This document encloses the supplementary material: I. Compilation of studies on the comparative size between Google Scholar, Web of Science and Scopus (publications, citations, unique citations, h-index) II. Compilation of studies on the correlation between Google Scholar, Web of Science and Scopus (authors, citations, and average h-index) Referen...
Article
Full-text available
The main objective of this paper is to identify the set of highly-cited documents in Google Scholar and to define their core characteristics (document types, language, free availability, source providers, and number of versions), under the hypothesis that the wide coverage of this search engine may provide a different portrait about this document s...
Technical Report
Full-text available
The objective of this report is to present a list of proceedings (conferences, workshops, symposia, meetings) in the areas of Computer Science, Electrical & Electronic Engineering, and Communications covered by Google Scholar Metrics and ranked according to their h-index. Google Scholar Metrics only displays publications that have published at leas...
Book
Full-text available
Google Scholar brought a true revolution in the way scientific information is searched, found, and accessed. The simple search box, already a de facto standard for searching information, takes users to numerous and relevant results including all document types, written in any language, and published in any country. Using this search engine is easy,...
Article
Full-text available
This study aims to promote reflection and bring attention to the potential adverse effects of academic social networks on science. These academic social networks, where authors can display their publications, have become new scientific communication channels, accelerating the dissemination of research results, facilitating data sharing, and strongl...
Article
Full-text available
Pretende este trabajo provocar la reflexión y alertar de los posibles peligros para la ciencia que encierran las nuevas redes sociales académicas que tanto éxito están teniendo en nuestros días. Las redes sociales académicas donde los autores pueden mostrar sus publicaciones se han convertido en nuevos canales de comunicación científica, pues agili...
Technical Report
Full-text available
Se presentan rankings por campos científicos y disciplinas de las revistas científicas españolas que figuran en Google Scholar Metrics (GSM). Se ordenan de acuerdo con el índice h que es el indicador bibliométrico adoptado por Google. Se pretende con este trabajo comprobar la amplitud en la cobertura que posee Google Scholar Metrics de las revistas...
Article
Full-text available
The main goal of this article is to describe the purpose and content of a new branch of bibliometrics: ALMetrics (Author- Level Metrics). ALMetrics is focused on the quantitative analysis of an author’s performance by measuring the dimensions of their intellectual activity as shown through varied metric indicators. This article will list, define, a...
Presentation
Full-text available
Presentación elaborada para la impartición de un curso dentro del Programa de Doctorado en Estudios Migratorios de la Universidad de Granada sobre visibilidad y divulgación de la producción científica. El objetivo es enseñar a construir una identidad científica digital, que mejore la difusión y transmisión de la producción científica de un investig...
Article
Full-text available
ResearchGate es una de las más importantes redes sociales académicas, con más de 9 millones de usuarios y 80 millones de documentos. Además de importantes herramientas de networking social académico y ofertas de empleo, proporciona un amplio catálogo de indicadores bibliométricos, entre los que se encuentra ResearchGate Score. El objetivo principal...
Article
A study released by the Google Scholar team found an apparently increasing fraction of citations to old articles from studies published in the last 24 years (1990–2013). To demonstrate this finding we conducted a complementary study using a different data source (Journal Citation Reports), metric (aggregate cited half-life), time spam (2003–2013),...