doi.org/10.4185/rlcs-2020-1454
Article

Uses of the podcast for educational purposes. Systematic mapping of the literature in WoS and Scopus (2014-2019)
Usos del podcast para fines educativos. Mapeo sistemático de la literatura en WoS y Scopus (2014-2019)

Iñaki Celaya1
María Soledad Ramírez-Montoy2
Concepción Naval1
Elena Arbués1

1University of Navarra. Spain
2Tecnológico de Monterrey. México

Abstract
Introduction: There is little research available on the educational use of the audio podcast. The published literature (2014-2019) was reviewed, classifying uses, contexts, and categories of the audio podcast for educational purposes, and identifying authors and reference journals in the field. Methodology: The Systematic Mapping of Literature method was applied to a sample of open access articles indexed in the Web of Science and Scopus databases. The filtering of the sample was carried out according to inclusion and exclusion criteria.
Results and conclusions: 81 articles were found that highlight the main educational uses of the podcast and coincide in its usefulness to support learning in formal, non-formal, and informal educational institutions and settings. This work provides researchers, educators, and institutions with an updated baseline to further explore the educational strengths of the podcast.

Keywords: podcast, e-learning, systematic mapping of literature, open educational resources, educommunication, education.

Resumen
Introducción: la investigación disponible sobre el aprovechamiento educativo del podcast de audio es escasa. Se revisó la literatura publicada (2014-2019) clasificando usos, contextos y categorías del podcast de audio con fines educativos, e identificando autores y revistas de referencia en el ámbito. Metodología: se aplicó el método de Mapeo Sistemático de la Literatura a una muestra de artículos indexados de acceso abierto en las bases de datos Web of Science y Scopus. El filtrado de la muestra se llevó a cabo de acuerdo con unos criterios de inclusión y exclusión. Resultados y conclusiones: se hallaron 81 artículos que destacan los principales usos educativos del podcast y coinciden en su utilidad para apoyar el aprendizaje en instituciones y entornos educativos formales, no formales e informales. Este trabajo brinda a investigadores, educadores e instituciones una línea base actualizada para seguir explorando las virtudes educativas del podcast.

Palabras clave: podcast, e-learning, mapeo sistemático de la literatura, recursos educativos abiertos, educomunicación, educación.

Contents
1. Introduction. 2. Method. 2.1. Research questions. 2.2. Boolean search strings. 2.3. Inclusion and exclusion criteria. 3. Results. 4. Discussion and conclusions. 5. References.

Correspondence
Iñaki Celaya. University of Navarra. Spain. icelaya@alumni,unav.es
María Soledad Ramírez-Montoya. Tecnológico de Monterrey. México. solramirez@tec.mx
Concepción Naval. University of Navarra. Spain. cnaval@unav.es
Elena Arbués. University of Navarra. Spain. earbues@unav.es

Received: 29/10/2019.
Accepted: 17/04/2020.
Published: 31/07/2020.

Financing
This article has the collaboration of the consolidated Character, Education, and Citizenship Research Group of the University of Navarra (https://bit.ly/2ltO3qN);  Project 266632 “Bi-National Laboratory on Smart Sustainable Energy Management and Technology Training” also participates, supported by CONACYT SENER Fund for energy sustainability (Agreement: S0019¬2014¬01). Support from CONACYT and Tecnológico de Monterrey as responsible for the project is appreciated (https://bit.ly/2krVhLO). Likewise, the funding of the Association of Friends of the University of Navarra (https://bit.ly/2lCFNEN) is appreciated.  

Dates:
Start of research: 02/01/2019.
End of research: 08/01/2019.

How to cite this article / Standard reference
Celaya, I., Ramírez-Montoya, M. S., Naval, C., & Arbués, E. (2020). Uses of the podcast for educational purposes. Systematic mapping of the literature in WoS and Scopus (2014-2019). Revista Latina de Comunicación Social, (77), 179-201. https://www.doi.org/10.4185/RLCS-2020-1454

Translation by Paula González (Universidad Católica Andrés Bello,Venezuela).

1. Introduction

Educommunication studies phenomena that emanate from the synergies between communication and education. It not only tries to educate through the media, but also promotes education aimed at information management, internet-related technology, and the mass media (Aguaded, 2005; 2011; 2012). The emergence of the Web 2.0 of O’Reilly (2005) was a stimulus for citizen participation on the internet, a context that according to Naval and Arbués (2015) configures privileged spaces for participation.  From this, what Jenkins, Purushotma, Werigel, Clinton, and Robinson (2009) have called participatory culture is consolidated. In this context, the ability to critically discern and value the vast amount of information available becomes essential. Gone are concepts such as computer literacy and information literacy (Gallado, 2013; Bundy, 2004), focused on managing the media in its most technical dimension. The paradigm of media education is more appropriate insofar as it considers aspects related to content and its consumption. As Naval, Serrano-Puche, Sádaba, and Arbués (2016) indicate, media education is already a priority, both in the educational system and in the main international organizations. Along these lines, Khan (2009) delves into the challenges of media education and establishes that collaboration between governments, companies, and civil society is crucial to advance on this path (p. 10).
The transformation of information into knowledge occurs through a directed human process, a coordination of cognitive skills that gives meaning to the data, to order it coherently, so that it is useful and can solve problems (Díaz, 2012). This is how the information society construct evolves into the knowledge society construct (Castells, 2006; Phillips, Hameed, & El Akhdary, 2017). The people who make up society continually appropriate elements of the environment, process them as knowledge, and educate themselves, which is known as informal learning (Esclapez, 2008).
On the other hand, in the formal education system, the mentioned elements are crystallized through approaches derived from e-learning, m-learning (learning through mobile devices), and u-learning (ubiquitous learning), among others. Along these lines, Keegan (2005) highlights the latent learning opportunities on mobile platforms -tablets, telephones, and their complementary services linked to the internet- a field that has been called m-learning. For their part, Burbules (2012; 2014) and Zapata-Ros (2012) explain how u-learning takes advantage of the omnipresence of those media and sources with educational potential provided by the knowledge society, which overcome many of the limitations of traditional education systems.  
The open education movement seeks to overcome the limitations of access and intellectual property that traditional analog resources present (Blessinger & Bliss, 2016). Unesco (2002) defends the proliferation of new Open Educational Resources (OER), supported by Information and Communication Technologies (ICT), with non-commercial uses. Those educational materials or activities that allow open access training practices are created and used. Consequently, D’Antoni (2009) points out that citizens, educators, and institutions have been the main benefited agents.
The most relevant advances of the open educational movement have been promoting quality open content, breaking down barriers to open educational content, and encouraging people around the world to use OER. These, according to a four-stage taxonomy, range from the production of activities and OER available on the internet to the selection and use of materials through repositories and connectors that act as catalog infomediaries; as well as the dissemination of open practices in academic, governmental, and institutional settings, NGOs, academies, companies, and other instances, and mobilization practices that allow them to be integrated into training actions (Ramírez-Montoya, 2018; Ramírez-Montoya and Burgos, 2012).
It is really interesting to observe how currently the majority of media with educational potential based on ICT escape purely educational or communicative categorizations and acquire a dual nature. This is what happens with blogs, vlogs, wikis, or podcasts, among others: they are educommunicative objects. Among them, the podcast format, in particular, is a digital media of the 2.0 era. According to Sellas (2011), it began to be defined in the early 2000s, as a result of the exchange of audio files between technophile users, but it officially took shape in 2004, when technology journalist Ben Hammersley (2004) described the consolidation of these practices in an article called Audible revolution. While it has been popularly called «internet radio», Gallego (2010) links the identity of the podcast to automatic syndication via RSS protocol, which allows its free and gratuitous distribution over the internet, as well as its deferred consumption on user demand.
The podcast format can contain only audio or associated video as well, in which case it is called a video podcast or vodcast, which is similar to the videoblog format. Podcasting is experiencing a significant boom as a means of communication in recent years, where audio predominates. It is analogous to the YouTube phenomenon in the field of audio since it collects amateur initiatives while serving as an extension to traditional media, and platforms such as Spotify or Apple Podcasts serve as showcases. The United States is the country where most podcasts are listened to. Edison Research (2019) concludes that 90 million Americans, 32% of the population, would have listened to podcasts in the past month. The data in Spain is more modest, 350,000 listeners, 1.2% of Internet users, according to EGM (2017). However, it is a format that shows an upward consumption trend.
The educational community has experimented from very early on with the podcast format. Research on its educational use has been promoted in its beginnings by university projects such as the Duke Digital Initiative, which in its edition from 2005 to 2006 explored the potential of the production and consumption of academic content in audio and video podcast formats. (Earp, Belanger, & O`Brien, 2006). Borges (2009) pointed out cognitive advantages due to its use in the classroom and greater involvement, self-management, availability of the material, continuity in the study, understanding, and reduction of anxiety (pp. 35-36); he also emphasized that recorded classes or lecturecasting is only one of its possible applications (p. 43). The EDUCAUSE organization, which promotes innovation in higher education through ICT, uses the podcast as a means of broadcasting interviews on innovation, good educational practices, and teacher training. Also in this line, but in the informal sphere, the podcast has been studied as a container and diffuser for scientific disclosure (de-Lara-González & del-Campo-Cañizares, 2018), while authors such as Forbes & Khoo (2015) have focused on its usefulness to deliver education in a non-classroom mode.
Regarding meta-studies on podcasting, the review that Hew (2009) presented a decade ago stands out, in addition to more recent works focused on the areas of radio communication (Arribas, Gutiérrez, Fragoso, & Arcos, 2018), training in emergency medicine (Paterson, Thoma, Milne, Lin, & Chan, 2015), language learning (Hasan & Hoon, 2013; Lomicka & Lord, 2011), and higher education (McGarr, 2009). These works are very specific and do not address the educational uses of the podcast in an aggregated and multidisciplinary way. Consequently, we consider novel an updated review that explores the literature regarding the podcast for educational purposes in all disciplines, to obtain information on the current state of the object of study. 
This work presents the results obtained from a systematic mapping of the literature, which was carried out in early 2019, to know the educational uses that have been given to the audio podcast. For this, the literature between January 2014 and February 2019 was located in the main databases (Scopus and Web of Science), spanning a five-year period. The method applied in the study and the obtained results are detailed, as well as the analysis of the data, which updates the state of the art on the educational podcast. The conclusions point to both the educational and academic communities, delving into the educational virtuality of podcasting, and also illuminating new lines of research that may be useful to develop future research on the subject.

2. Method

The Systematic Mapping of Literature is a research method that allows tracing the evidence in a domain with a high level of granularity. This helps to identify evidence groups and evidence gaps to develop future literature reviews and primary studies (Kitchenham & Charters, 2007; Kitchenham, Pretorius, Budgen, Brereton, Turner, Niazi, & Linkman, 2010). It is common to use mapping as a preliminary (descriptive) phase to a systematic (analytical) review, which gives more context and structure to the object of study (cascade, 2012).

2.1. Research questions

First of all, as suggested by the collaborations of Kroll, Richardson, Prikladnicki, and Audy (2018) and Petersen, Vakkalanka, and Kuzniarz (2015), a series of research questions (RQ) were established, to focus the search strategy.

Secondly, to answer the proposed RQs, a search strategy was designed that was limited to journal articles indexed in the Scopus and WoS databases (sci-e; ssci; a&hci; esci), which were chosen based on their vast collection and extensive reputation in the scientific field. The axes of the article selection strategy were the establishment of inclusion, duplication, and exclusion criteria, applied to Boolean search strings.

2.2. Boolean search strings

Search strings made up of Boolean expressions based on the keywords podcast, online radio, profcast, lecturecasting, education, and train were used. With these parameters, 2,447 initial results were obtained: 1,659 in Scopus and 788 in WoS. The raw results were obtained from the search strings reflected in Table 1.

Table 1. Search strings.


Source: own elaboration.

2.3. Inclusion and exclusion criteria

The proposed inclusion and exclusion criteria for filtering the original sample were decided based on pragmatism, seeking a reasonable balance between quantity and quality. According to Table 2, those articles from closed journals were excluded due to the difficulty of accessing the full text. According to Melero and Hernández-San-Miguel (2014) and García-Peñalvo (2017), open science facilitates the circulation of research data among researchers and guarantees the reproducibility of studies. Furthermore, studies such as that of Breugelmans, Roberge, Tippett, Durning, Struck, and Makanga (2018), McKiernan et al., (2016), Piwowar et al., (2018), and Wang, Liu, Mao, and Fang (2015) suggest that open access articles tend to have a greater scientific impact measured in bibliographic citations. On the other hand, it was decided not to filter by discipline, since the podcast has been used for educational purposes in areas other than education. The language variable was not limited. Studies using video podcasts were discarded. The vodcast appears in multiple educational research works where, many times, audio and video are included under the same podcast concept, without distinction. This conceptual disparity can lead to confusion since these are different resources, as Brabazon (2016) points out, who also indicates that the added value of video in content assimilation is debatable (p. 135). These differences and the fact that video in education has been in fashion in recent years leads us to focus our attention this time on the audio podcast.

Table 2. Inclusion and exclusion criterio.


Source: own elaboration.

Once the initial search was filtered according to the inclusion criteria, 169 items remained: 76 in Scopus and 93 in WoS. Duplicate items were then removed. For this, priority was given to the Scopus database, and, consequently, 34 duplicate WoS items were discarded. Subsequently, the titles and abstracts of each of the remaining articles were read. An additional 54 articles were rejected after applying the exclusion criteria. Figure 1 shows a diagram with the filtering process carried out until obtaining the final sample.

Source: own elaboration.

Figure 1. Diagram with the sample filtering steps.

3. Results

RQ1 - How many open-access studies on the educational treatment of the audio podcast are there in the Scopus and WoS databases between January 2014 and February 2019? After completely filtering the sample, a total of 81 articles related to the educational use of the podcast were obtained, which are included in Table 3.

Table 3. The final sample of articles on the educational use of the podcast.

Source: own elaboration.

The publicly accessible database with the 81 articles included in the final sample is available at (https://bit.ly/2yLSaoF).

Source: own elaboration.


Figure 2. Open access articles based on the year of publication in the Scopus and WoS databases.

The relationship of publications based on the year of publication (Figure 2) follows a stable trend over time, slightly upward. The years with the most publications were 2017 and 2018 (both with 22 articles) while 2014 and 2016 were the years in which the least was published (8 and 11 articles respectively). The 2019 data (5 articles) is conditioned by the search dates, February of that year, so they should not be taken into account in the bibliometric analysis.
Based on the databases, Scopus has 50 articles (62%) and WoS has 31 (38%). It is striking how the total number of final items decreases when adding the filter of open access articles only. The reason is that there are fewer open access journals available.
Subsequently, the titles and abstracts of the articles were analyzed to obtain the answer to the remaining RQs. In some cases, when the abstract did not offer enough information, the full text was consulted.

RQ1.1 – What research methods were applied in the studies?

The results show that the majority of the analyzed studies applied empirical methods, 43 in their quantitative aspect and another 24 mixed. Also, 14 theoretical articles were registered. Table 4 includes the articles classified according to the research method used and their percentage of the total sample.

Table 4. Research methods applied by the studies.


Source: own elaboration.

RQ1.2 – What is the geographical distribution of the authors who published the most in the area? 
Of the 81 analyzed articles, the countries with the most publications are the United States (19), Canada (12), the United Kingdom (7), Spain (7), and Brazil (5) respectively. It can be seen in Figure 3 that North America concentrates much of the total published. The criteria used to establish geographic origin was the provenance of the university to which the first author of each article was affiliated.

Source: own elaboration.


Figure 3. The number of publications by country.

RQ1.3 – Which are the most cited articles?

The articles totaled 345 citations. Considering the quartiles according to the impact index of the journals, the sample of articles is distributed as follows: 18 articles in Q1, 20 in Q2, 13 in Q3, and 4 in Q4. A further 26 articles were registered from the WoS Emerging Sources Citation Index (ESCI) database. As table 5 indicates, 47% of all studies were published in the first two quartiles. 

Table 5. Classification of articles according to the quartile of their journal.


Source: own elaboration.

To answer more concisely to RQ1.3, those articles with 10 or more citations were identified, which were considered high impact. They were represented hierarchically in Figure 4, according to criteria of the number of citations and relative weight in the different impact quartiles.

Source: own elaboration.


Figure 4. Articles with more than 10 citations ordered according to their quartile.

Most articles with more citations were located in Q2, with a total of 5 articles and 122 citations in total. Q1 is the second most important, with 3 high impact articles that added 109 citations. In Q3 only 1 high-impact article was found, with 13 citations in total. No article with more than 10 citations was found belonging to the Q4 or ESCI.

RQ4 – Which are the journals that published the most on the subject? 

Eight journals with more than one published article were identified (Table 6), which bring together 35% of the entire studied sample. As for the topic area, they can be divided between medical education journals (19 articles) and educational technology journals (6 articles). The Western Journal of Emergency Medicine (10) and the Canadian Journal of Emergency Medicine (4) stand out by the number of publications, both belonging to the medical field.

Table 6. Journals with more than two publications.


Source: own elaboration.

RQ2 - In what contexts did the studies take place?

To answer RQ2, the Ramírez-Montoya and García-Peñalvo (2018) classification was used, which classifies the contexts of educational performance in academic, social, business, and cultural. Thus, the articles were analyzed according to the context in which the research had been carried out.
Specifically, 35 articles were found in the academic context, 10 in the social context, 9 in the business context, and 1 related to the cultural context. Table 7 shows the relationship of the articles according to each of the contexts, while Figure 5 classifies the studies in an academic context according to the specific educational stage in which they are included.

Table 7. Contexts of the studies.


Source: own elaboration.

Source: own elaboration.


Figure 5. Distribution of articles in academic context according to their educational stage.

RQ3 - What are the thematic categories in which the educational use of the audio podcast was structured?

Finally, RQ3 identified the emerging categories according to the most specific approaches of the studies, grouping them according to the educational function they confer to the podcast (production, selection/use, dissemination, and mobilization). 

Table 8 shows how studies conceive podcasting according to the taxonomy of open educational practices and the percentage weight of each category. According to the above, and considering the podcast format as OER, 23 articles on production (28%), 30 articles on selection/use (37%), 3 articles on dissemination (4%), and 25 articles focused on mobilization (31%) were found.

Table 8. Studies according to their educational function


Source: own elaboration.

4. Discussion and conclusions

The sample of articles studied draws a constant publication trend from 2014 to the present as shown in Figure 2. Half of the articles are in the upper quartiles of impact, Q1 and Q2 (Table 5), even more so the most cited (Figure 4). The studies present a practical approach to the subject: they apply mostly empirical methods, both quantitative and mixed (Table 4). The trend towards empirical research is similar to that of Hew's study (2009). The survey and interview were the most widely used methods in empirical studies, along with others such as the case study. Regarding regions, the United States, Canada, United Kingdom, Spain, and Brazil were the countries that published the most articles on the subject (Figure 3). It is not surprising that the United States and Canada appear in the first place, given that media studies such as Edison Research (2019) already showed that North America is the region with the largest presence of podcasting worldwide.
On the other hand, it should be noted that most of the scientific production focuses on academic contexts, specifically formal education centers, although also to a lesser extent on social and business contexts (Table 7). However, as Figure 5 shows, it is in the higher education stage where the bulk of the research has been concentrated. McGarr (2009) distinguishes between three categories regarding the implementation of podcasts in higher education: substitute and complementary to the lessons, or creative, which would imply that students create content from what they have learned. For their part, Forbes and Khoo (2015) found that student-generated podcasts had the potential for distance formative evaluation, as well as to share ideas between students and teachers. However, considering the increasing complexity of the aforementioned categories, the most common literature focuses on the substitute and complementary categories, with creative production being more expensive and, therefore, scarce.
Regarding the specific uses of the podcast format, or categories that emerge from the studies, it was found that the literature affects the production, selection, and use of podcast resources and their mobilization for educational purposes (Table 8). The spectrum of educational uses has oscillated in the past between the use of podcast content for dissemination in universities and educational centers (McGarr, 2009; Lomicka & Lord, 2011; de-Lara-González & del-Campo-Cañizares, 2018, p. 351), and an application of the format itself as a vehicle to deliver training in a non-face-to-face mode (Hasan & Hoon, 2013; Forbes & Khoo, 2015). The accomplished mapping uncovers a varied list of proposals around the podcast that the researchers carried out in the last 5 years: they study podcasting in formal education settings in its various educational stages; but also, in the institutional sphere, concerning personnel training. The uses are very varied, the main ones being language teaching, training of medical personnel, digital literacy, and social and health education in informal contexts. The role of the podcast as a means of disseminating scientific production is also documented, to a lesser extent, which refers to its role as an instrument for broadcasting (Ramírez-Montoya and Burgos, 2012). In light of the above, it can be seen that the interest in the educational podcast not only continues but that, judging by the results, its uses evolve over time.
This systematic mapping finds its main limitation in the selection of the object of study. On the one hand, it was resolved to limit the concept of the podcast to that format consisting of syndicated digital files in audio format, since as explained in the introductory part, this work considers that podcasts and vodcasts are concepts with differentiable characteristics. Consequently, all those studies that refer to video podcasts were discarded. On the other hand, the search was limited to studies published in open access based on accessibility and opportunity criteria (Table 2), consciously renouncing to many other quality articles that might have been interesting for the review. Furthermore, the nature of a systematic mapping per se implies a limitation of depth in the analysis. The aim is to present the topic in a more descriptive than analytical way. Also, limiting the search to the last 5 years leaves out previously published works. However, this is a deliberate decision in the design of this research, considering that this previous stage is covered by the third-party reviews cited in the introduction.
To overcome the aforementioned limitations, it is considered valuable for future research to continue delving into the podcast for educational purposes through a systematic review, which would describe the depth of the localized studies and compare them with each other. Additionally, the present mapping detected a deficit of studies oriented towards the infant, primary, and secondary educational stages in scientific production with more impact (Figure 5). As a hypothesis, this lack could be explained as a consequence of the eminently practical and not so much investigative profile of many teachers of these educational stages, who would go to conferences and congresses rather than to journals. However, higher education professionals would be more familiar with the scientific publishing system. Thus, we encourage researchers to study what is published in the so-called "gray literature" that could shed light on the uses of podcasting in these mentioned educational stages.
Based on the analyzed studies, we conclude that the podcast is a multipurpose medium that continues to be used in various ways in education: in its facet of educommunicative object, it has been used to disseminate scientific and social knowledge, instruct in institutional settings, as well as to promote critical and reflective attitudes. As OER, it has been applied in all educational stages, at a distance or in classroom settings, in formal, non-formal, and informal education contexts. Besides, referring to its ease of production, it has been used to work with learning communities and in the development of repositories with training content. Podcasting is one more technological tool at the service of education.

References

  1. Aguaded, I. (2005). Estrategias de edu-comunicación en la sociedad audiovisual. Comunicar, 12(24), 25-34. http://hdl.handle.net/10272/1208
  2. Aguaded, I. (2011). La educación mediática, un movimiento internacional imparable La ONU, Europa y España apuestan por la educomunicación [Media education: an international unstoppable phenomenon UN, Europe and Spain support for edu-communication]. Comunicar, 18(37), 7-8. https://doi.org/10.3916/C37-2011-01-01
  3. Aguaded, I. (2012). La educomunicación: una apuesta de mañana, necesaria para hoy. Aularia: Revista Digital de Comunicación, 1(2), 259-261. http://rabida.uhu.es/dspace/bitstream/handle/10272/6342/La_educomunicacion.pdf?sequence=2
  4. Arribas, R. G., Gutiérrez, F. J. H., Fregoso, M. V., & Arcos, C. A. M. (2018). Estudios sobre el podcast radiofónico: revisión sistemática bibliográfica en WOS y Scopus que denota una escasa producción científica. Revista Latina de Comunicación Social, (73), 1398-1411. http://dx.doi.org/10.4185/RLCS-2018-1313
  5. Borges, F. (2009). Profcasts: aprender y enseñar con podcasts. Editorial UOC.
  6. Blessinger, P., & Bliss, T. (2016). Introduction to Open Education: Towards a Human Rights Theory. En Blessinger, P., & Bliss, T. (Eds.), Open Education: International Perspectives in Higher Education (pp. 11-30). Open Book. http://www.jstor.org/stable/j.ctt1sq5v9n.6 Conference Name:ACM Woodstock conference
  7. Brabazon, T. (2016). Digital dieting: From information obesity to intellectual fitness. Routledge.
  8. Breugelmans, J. G., Roberge, G., Tippett, C., Durning, M., Struck, D. B., & Makanga, M. M. (2018). Scientific impact increases when researchers publish in open access and international collaboration: A bibliometric analysis on poverty-related disease papers. PLOS ONE 13(9): e0203156. https://doi.org/10.1371/journal.pone.0203156
  9. Bundy, A. (Ed.). (2004). Australian and New Zealand information leteracy framework, principles, standards and practice. Australian and New Zealand Institute for Information Literacy, 2. http://www.libnet.sh.cn/upload/htmleditor/File/130620025617.pdf
  10. Burbules, N. C. (2012). El aprendizaje ubicuo y el futuro de la enseñanza [Ubiquitous Learning and the Future of Teaching]. Encounters, 13, 3-14. https://ojs.library.queensu.ca/index.php/encounters/article/download/4472/4513/0
  11. Burbules, N. C. (2014). El aprendizaje ubicuo: nuevos contextos, nuevos procesos. Entramados: educación y sociedad, 1(1), 131-134. 13. https://fh.mdp.edu.ar/revistas/index.php/entramados/article/view/1084/1127
  12. CASCADE. (2012). Mapping in literature reviews. https://as.exeter.ac.uk/media/universityofexeter/academicservices/educationenhancement/cascade/Mapping_in_literature_reviews.pdf
  13. Castells, M. (2006). The network society: From knowledge to policy. En Castells, M., & Cardoso, G. (Eds.). The network society: From knowledge to policy (pp. 3-23). Johns Hopkins Center for Transatlantic Relations. https://www.dhi.ac.uk/san/waysofbeing/data/communication-zangana-castells-2006.pdf
  14. D’Antoni, S. (2009). Open Educational Resources: reviewing initiatives and issues. Open Learning: The Journal of Open, Distance and e-Learning, 24(1), 3-10. https://doi.org/10.1080/02680510802625443
  15. de-Lara-González, A., & del-Campo-Cañizares, E. (2018). El podcast como medio de divulgación científica y su capacidad para conectar con la audiencia. Revista Mediterránea de Comunicación / Mediterranean Journal of Communication, 9(1), 347-359. https://doi.org/10.14198/MEDCOM2018.9.1.15
  16. Díaz, V. A. (2012). Pensar la sociedad de la información/conocimiento. Biblioteca Universitaria, 15(1), 35-47. http://dx.doi.org/10.22201/dgb.0187750xp.2012.1.40  
  17. Earp, S., Belanger, Y., & O’Brien, L. (2006). Duke digital initiative end of year report. Duke University. https://learninginnovation.duke.edu/pdf/reports/ddiEval0506_final.pdf
  18. Edison Research. (2019). The Infinite Dial 2019. http://www.edisonresearch.com/wp-content/uploads/2019/03/Infinite-Dial-2019-PDF-1.pdf
  19. EGM. (2017). 1ª ola EGM: el consumo de podcasts en España representa el 1,6% de la escucha total de radio. https://www.aimc.es/a1mc-c0nt3nt/uploads/2017/05/170419_egm_2017ola1.pdf
  20. Esclapez, T. C. (2008). La enseñanza que no se ve: educación informal en el siglo XXI (Vol. 7). Narcea Ediciones.
  21. Forbes, D., & Khoo, E. (2015). Voice over distance: a case of podcasting for learning in online teacher education. Distance Education, 36(3), 335-350. https://doi.org/10.1080/01587919.2015.1084074
  22. Gallado, E. E. (2013). Competencia digital: revisión integradora de la literatura. Revista de Ciencias de la Educación Academicus, 1(3), 56-62. http://www.ice.uabjo.mx/media/15/2017/04/Art3_7.pdf
  23. Gallego, J. I. (2010). Podcasting: distribución de contenidos sonoros y nuevas formas de negocio en la empresa radiofónica española (Tesis doctoral). Universidad Complutense de Madrid, Madrid. https://eprints.ucm.es/11205/1/T32070.pdf
  24. García-Peñalvo, F. J. (2017). Mitos y realidades del acceso abierto. Education in the Knowledge Society, 18(1), 7-20. https://www.redalyc.org/pdf/5355/535554765001.pdf
  25. Hammersley, B. (12 de febrero de 2004). Audible revolution. The Guardian. https://www.theguardian.com/media/2004/feb/12/broadcasting.digitalmedia 
  26. Hasan, M. M., & Hoon, T. B. (2013). Podcast Applications in Language Learning: A Review of Recent Studies. English Language Teaching, 6(2), 128–135. https://files.eric.ed.gov/fulltext/EJ1076962.pdf
  27. Hew, K. F. (2009). Use of Audio Podcast in K-12 and Higher Education: A Review of Research Topics and Methodologies. Educational Technology Research and Development, 57(3), 333–357. http://dx.doi.org/10.1007/s11423-008-9108-3
  28. Jenkins, H., Purushotma, R., Werigel, M., Clinton, K., & Robinson, A.J. (2009). Confronting the challenges of participatory culture: Media Education for the 21st century. The MIT Press.
  29. Keegan, D. (2005). Mobile learning: the next generation of learning. Distance Education International, 36, 137-143. http://www.cin.ufpe.br/~mlearning/intranet/m-learning/book.doc
  30. Khan, A. W. (2009). Foreward: Unesco. En Frau-Meigs, D., & Torrent, J. (Eds.). Mapping media education policies in the world: visions, programmes and challenges. Grupo Comunicar. https://unesdoc.unesco.org/ark:/48223/pf0000181917.locale=es
  31. Kitchenham, B., & Charters, S. (2007). Guidelines for performing systematic literature reviews in software engineering. Keele University & University of Durham. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.117.471&rep=rep1&type=pdf
  32. Kitchenham, B., Pretorius, R., Budgen, D., Brereton, O. P., Turner, M., Niazi, M., & Linkman, S. (2010). Systematic literature reviews in software engineering–a tertiary study. Information and software technology, 52(8), 792-805. https://doi.org/10.1016/j.infsof.2010.03.006
  33. Kroll, J., Richardson, I., Prikladnicki, R., & Audy, J. L. (2018). Empirical evidence in follow the sun software development: a systematic mapping study. Information and Software Technology, 93, 30-44. https://doi.org/10.1016/j.infsof.2017.08.011
  34. Lomicka, L., & Lord, G. (2011). Podcasting–past, present and future: Applications of academic podcasting in and out of the language classroom. En Academic podcasting and mobile assisted language learning: Applications and outcomes (pp. 1-20). IGI Global.
  35. McGarr, O. (2009). Podcasting in higher education: a review of the literature with particular reference to its influence on the traditional lecture. Australasian Journal of Educational Technology, 25(3), 309-321. https://doi.org/10.14742/ajet.1136
  36. McKiernan, E. C., Bourne, P. E., Brown, C. T., Buck, S., Kenall, A., Lin, J., McDougall, D., Nosek, B. A., Ram, K., Soderberg, C. K., Spies, J. R., Thaney, K., Updegrove, A., Woo, K. H., & Yarkoni, T. (2016). Point of view: How open science helps researchers succeed. Elife, 5. https://elifesciences.org/articles/16800
  37. Melero, R. y Hernández-San-Miguel, J. (2014). Acceso abierto a los datos de investigación, una vía hacia la colaboración científica. Revista Española de Documentación Científica, 37(4). http://redc.revistas.csic.es/index.php/redc/article/view/869/1175
  38. Naval, C., & Arbués, E. (2015). Del uso de Internet en la promoción de virtudes sociales. Un caso concreto: Parlamento Cívico. Teoría De La Educación. Revista Interuniversitaria, 27(1), 33-52. http://revistas.usal.es/index.php/1130-3743/article/view/teoredu20152713352/13434
  39. Naval, C., Serrano-Puche, J., Sádaba, C., y Arbués, E. (2016). Sobre la necesidad de desconectar: algunos datos y propuestas. Education in the Knowledge Society, 17(2), 73-90. http://hdl.handle.net/10171/41534
  40. O�Reilly, T. (2005). What Is Web 2.0. O’Reilly Media Inc. http://goo.gl/HzTN3N
  41. Paterson, Q. S., Thoma, B., Milne, W. K., Lin, M., & Chan, T. M. (2015). A Systematic Review and Qualitative Analysis to Determine Quality Indicators for Health Professions Education Blogs and Podcasts. Journal Of Graduate Medical Education, 7(4), 549–554. https://doi.org/10.4300/JGME-D-14-00728.1
  42. Petersen, K., Vakkalanka, S., & Kuzniarz, L. (2015). Guidelines for conducting systematic mapping studies in software engineering: An update. Information and Software Technology, 64, 1–18. https://doi.org/10.1016/j.infsof.2015.03.007
  43. Phillips, F., Yu, C. Y., Hameed, T., & El Akhdary, M. A. (2017). The knowledge society’s origins and current trajectory. International Journal of Innovation Studies, 1(3), 175-191. https://doi.org/10.1016/j.ijis.2017.08.001
  44. Piwowar, H., Priem, J., Larivière, V., Alperin, J. P., Matthias, L., Norlander, B., Farley, A., West, J., & Haustein, S. (2018). The state of OA: a large-scale analysis of the prevalence and impact of Open Access articles. PeerJ, 6. https://doi.org/10.7717/peerj.4375
  45. Ramírez-Montoya, M. S. (2018). Innovación abierta, interdisciplinaria y colaborativa para formar en sustentabilidad energética a través de MOOCs e investigación educativa. Education in the Knowledge Society (EKS), 19(4), 11-30. https://doi.org/10.14201/eks20171821932
  46. Ramírez-Montoya, M. S. y Burgos, J. V. (Coords.) (2012). Movimiento educativo abierto: Acceso, colaboración y movilización de recursos educativos abiertos. [eBook]. Lulú editorial digital. http://catedra.ruv.itesm.mx/handle/987654321/564
  47. Ramírez-Montoya, M. S., & García-Peñalvo, F. (2018). Co-creation and open innovation: Systematic literature review. [Co-creación e innovación abierta: Revisión sistemática de literatura]. Comunicar, 54, 09-18. https://doi.org/10.3916/C54-2018-01
  48. Sellas, T. (2011). El Podcasting: la (r)evolución sonora. Editorial UOC.
  49. Unesco. (2002). Forum on the impact of open courseware for higher education in developing countries: Final report. https://unesdoc.unesco.org/ark:/48223/pf0000128515.locale=es
  50. Wang, X., Liu, C., Mao, W., & Fang, Z. (2015). The open access advantage considering citation, article usage and social media attention. Scientometrics, 103(2), 555-564. https://link.springer.com/content/pdf/10.1007%2Fs11192-015-1547-0.pdf
  51. Zapata Ros, M. (2015). Teorías y modelos sobre el aprendizaje en entornos conectados y ubicuos. Bases para un nuevo modelo teórico a partir de una visión crítica del “conectivismo”. Education in the Knowledge Society (EKS), 16(1), 69-102. http://revistas.usal.es/index.php/eks/article/view/eks201516169102

Authors

Iñaki Celaya
Teacher, pedagogue, and Master in Research in Social Sciences from the University of Navarra. Research Staff in Training and student of the Doctoral Program in Education and Psychology of the University of Navarra, since 2017. His research focuses on the educational virtuality of digital media, specifically the audio podcast format, which is part of the consolidated “Character, Education, and Citizenship” Research Group of the University of Navarra. He collaborates in teaching in the degrees of Education and Psychology. He has carried out a research stay at the School of Humanities and Education of the Tecnológico de Monterrey (Mexico) from January to June 2019.
icelaya@alumni.unav.es
Orcid ID:  https://orcid.org/0000-0003-0384-3575
Google Scholar: https://bit.ly/2kicHus

María Soledad Ramírez Montoya
Ph.D. in Philosophy and Educational Sciences from the University of Salamanca and Senior Researcher at the School of Humanities and Education at the Tecnológico de Monterrey. She is director of the Unesco Chair: “Open Educational Movement for Latin America”, director of the office of the International Council for Open and Distance Education (ICDE): OER Latin America, main researcher in the Strengthening Information Society Research Capacity Alliance (SIRCA) network, the main organizer of the Latin American Regional Open Network for Educational and Social Research (CLARISE by its acronym in Spanish). She is a member of the National System of Researchers in Mexico. Her lines of research are teaching strategies, technological resources for education, the training of educational researchers, and the open education movement. Her professional experience includes teaching activities at all educational levels, dean of postgraduate studies in humanities and education, department director, coordinator of research groups, and pedagogical consulting. She is a guest research professor in doctoral programs at European Universities (the University of Salamanca, University of Huelva, and the International University of La Rioja) and Latin American Universities (the Pontifical Catholic University of Peru, Particular Technical University of Loja, Catholic University of Peru, and the University of La Sabana).
solramirez@tec.mx
Índice H: according to GSM = 33; i10 = 105
Orcid ID: https://orcid.org/0000-0002-1274-706X
Google Scholar: https://bit.ly/2k4abrw 

Concepción Naval
Professor and Dean of the Faculty of Education and Psychology of the University of Navarra. Her research focuses on citizenship education and social participation, the social impact on young people of communication technologies, educational innovation in higher education, and character education. She initiated and directs the consolidated “Character, Education, and Citizenship” Research Group of the University of Navarra and the project "Researching and promoting character education in Central and South American secondary schools". Templeton World Charity Foundation (2016-2019): https://bit.ly/2jZ5PBQ She has directed the Editorial Board of the journal “Estudios sobre educación” since its beginnings in 2001 (Q2 in SJR, 2018). She is a member of the Editorial Board of the "Journal of Social Sciences Education" (Germany) and the Journal "Citizenship, Teaching, and Learning" (UK); of the Editorial Board of the “Revista Interuniversitaria de Formación del Profesorado”, of the Journal “Sembrando Ideas”, and of the “Revista Perspectiva Educacional” (Chile), among others. She has been Oliver Smithies Lecturer, Oxford University; Visiting Professor, Teachers College, Columbia University; Visiting Scholar Research, University of Harvard, University of Notre Dame (USA), International Bureau of Education (Unesco); Guest Professor, Universidad Panamericana, Mexico; Fellow of the Salzburg Seminar. She was a member of the group of experts of the project "A Study on Active Citizenship Indicators" financed by the European Commission, DG Education and Culture.
cnaval@unav.es
Índice H: according to GSM = 22; i10 = 65
Orcid ID: https://orcid.org/0000-0002-5927-9398
Google Scholar:  https://bit.ly/2jZkxsx

Elena Arbués
Hired Doctorate Professor and Vice Dean of Students of the Faculty of Education and Psychology at the University of Navarra. Her research focuses on teaching experimental science in primary education, as well as civic education, and promoting social participation. She has been Visiting Postdoctoral Scholar during 2013 at Balliol College, Holywell Manor, University of Oxford. She is a member of several research projects financed in public calls, she is currently a research member of the project "Service-Learning (APS) and employability of university students in Spain: skills for job placement" (MINECO State Plan (2017-2021) EDU2017 -82629-R).
earbues@unav.es
Índice H: according to GSM = 7; i10 = 4
Orcid ID: https://orcid.org/0000-0001-5872-830X
Google Scholar: https://bit.ly/2lTKCK5