June 9, 2019
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Article

Hierarchical graph maps for visualization of collaborative recommender systems

Publicated to: JOURNAL OF INFORMATION SCIENCE. 40 (1): 97-106 - 2014-02-01 40(1), DOI: 10.1177/0165551513507407

Authors:

Hernando, A; Moya, R; Ortega, F; Bobadilla, J
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Affiliations

Univ Politecn Madrid, FilmAffin Com Res Team, Madrid 28031, Spain - Author
Univ Politecn Madrid, Madrid 28031, Spain - Author

Abstract

In this paper we provide a method that allows the visualization of similarity relationships present between items of collaborative filtering recommender systems, as well as the relative importance of each of these. The objective is to offer visual representations of the recommender system's set of items and of their relationships; these graphs show us where the most representative information can be found and which items are rated in a more similar way by the recommender system's community of users. The visual representations achieved take the shape of phylogenetic trees, displaying the numerical similarity and the reliability between each pair of items considered to be similar. As a case study we provide the results obtained using the public database Movielens 1M, which contains 3900 movies.
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Keywords

Hierarchical graph mapsItemsOf-the-artRecommender systemsRepresentationTreeVisualization

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal JOURNAL OF INFORMATION SCIENCE due to its progression and the good impact it has achieved in recent years, according to the agency Scopus (SJR), it has become a reference in its field. In the year of publication of the work, 2014, it was in position , thus managing to position itself as a Q1 (Primer Cuartil), in the category Information Systems. Notably, the journal is positioned above the 90th percentile.

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2026-04-24:

  • Google Scholar: 28
  • WoS: 14
  • Scopus: 15
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Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2026-04-24:

  • The use, from an academic perspective evidenced by the Altmetric agency indicator referring to aggregations made by the personal bibliographic manager Mendeley, gives us a total of: 27.
  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 27 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

  • The Total Score from Altmetric: 4.
  • The number of mentions on the social network X (formerly Twitter): 1 (Altmetric).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.
  • Assignment of a Handle/URN as an identifier within the deposit in the Institutional Repository: https://oa.upm.es/33096/

As a result of the publication of the work in the institutional repository, statistical usage data has been obtained that reflects its impact. In terms of dissemination, we can state that, as of

  • Views: 451
  • Downloads: 477
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Leadership analysis of institutional authors

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (HERNANDO ESTEBAN, ANTONIO) and Last Author (BOBADILLA SANCHO, JESUS).

the author responsible for correspondence tasks has been BOBADILLA SANCHO, JESUS.

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Awards linked to the item

This research was supported by the Spanish Ministerio de Educacion, Cutura y Deporte TIN2012-32682 project.
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