In recent years, fact-checking journalism has become one of the dominant strategies to tackle disinformation. For these entities to be effective and gain the trust of citizens, it is essential that they carry out their work under the principles of ideological neutrality, especially when they try to verify political discourse. This paper, groundbreaking in the Spanish context, aims to analyze the verification practices and possible partisan biases of political fact-checking in Spain through a specific study applied to Newtral, the main fact-checker specialized in politics in this country. The political verification practices used by this fact-checker since the beginning of its activity (October 2018-October 2022) were analyzed through quantitative content analysis. In a second phase, the same study was replicated, applied only to the discourse of the main national political leaders. The s...

news production processes and workflows. This is occurring simultaneously with a paradigm shift in news consumption patterns, in addition to the growing use of Artificial Intelligence (AI) within this environment. Based on studies regarding the perceived credibility of news and Cognitive Dissonance Theory, this research questions whether university students in the field of communication, who will be the future professionals in this sector, are able to distinguish between fake news created by AI from real news produced by humans. Methodology. A survey was carried out to measure the degree of truthfulness, accuracy, clarity and, consequently, the credibility of a total of six news stories created using ChatGPT as well as real news stories addressing health, migration and environment issues. Results and conclusions. It was found that the participants were not able to distinguish between fak...