This paper analyzes the role of different origins to news media in selective exposure. We rely on a unique web-tracking online dataset from Spain to identify points of access to news outlets and study the influence of direct navigation and news-referred platforms (i.e., from Facebook and Google) on selective exposure. We also explore cross-level interactions between origins to news and political interest and ideology. We find that direct navigation increases selective exposure while Google reduces it. We also find that the relationship between origins to news and selective exposure is strongly moderated by ideology, suggesting that search engines and social media are not content neutral. Our findings suggest a rather complex picture regarding selective exposure online.

Whether people live in echo-chambers when they consume political information online has been the subject of much academic and public debate. This article contributes to this debate combining survey and web-tracking online data from Spain, a country known for its high political parallelism. We find that users spend more time in outlets of their political leanings but, generally, they engage in considerable cross-partisan media exposure, especially those in the left. In addition, we use a quasi experiment to test how major news events affect regular patterns of news consumption, and particularly, selective exposure. We find that the nature of news explains changes in users’ overall consumption behaviour, but this has less to do with the type of event than with the interest it arouses. More importantly, we find that users become more polarized along party lines as the level of news consumption and interest for news increases.

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Carlos Aguilar-Paredes es profesor asociado en comunicación audiovisual en la Facultad de Biblioteconomía y Documentación de la Universitat de Barcelona. Doctor por la UB, su investigación se centra en la búsqueda de metodologías cuantitativas para el análisis de contenidos audiovisuales tanto en medios tradicionales como en internet.

In order to analyze and detect neural activations and inhibitions in film spectators to shot changes by cut in films, we developed a methodology based on comparisons of recorded EEG signals and analyzed the event-related desynchronization/synchronization (ERD/ERS). The aim of the research is isolating these neuronal responses from other visual and auditory features that covary with film editing. This system of comparing pairs of signals using permutation tests, the Spearman correlation, and slope analysis is implemented in an automated way through sliding windows, analyzing all the registered electrodes signals at all the frequency bands defined. Through this methodology, we are able to locate, identify, and quantify the variations in neuronal rhythms in specific cortical areas and frequency ranges with temporal precision. Our results detected that after a cut there is a synchronization in theta rhythms during the first 188 ms with left lateralization, and also a desynchronization between 250 ms and 750 ms in the delta frequency band. The cortical area where most of these neuronal responses are detected in both cases is the parietal area.