This article presents key results of a comparative journalists' survey on media accountability, for which 1762 journalists in 14 countries had been interrogated online. The article explores how European journalists perceive the impact of old versus new media accountability instruments on professional journalistic standards -established instruments like press councils, ethics codes, ombudsmen and media criticism, but also more recent online instruments like newsroom blogs and criticism via social media. Thus, the study also adds empirical data to the current debate about the future of media self-regulation in Europe, ignited by the Leveson Inquiry in the United Kingdom as well as the European Commission's High-Level Group on Media Freedom and Pluralism.

This article analyzes the ethical discussion focusing on the Facebook emotional contagion experiment published by the <em>Proceedings of the National Academy of Sciences</em> in 2014. The massive-scale experiment manipulated the News Feeds of a large amount of Facebook users and was successful in proving that emotional contagion happens also in online environments. However, the experiment caused ethical concerns within and outside academia mainly for two intertwined reasons, the first revolving around the idea of research as manipulation, and the second focusing on the problematic definition of informed consent. The article concurs with recent research that the era of social media and big data research are posing a significant challenge to research ethics, the practice and views of which are grounded in the pre social media era, and reflect the classical ethical stances of utilitarianism and deontology.

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