<p>The objective of this research was to analyze the effect of feedback on discrimination and recognition of true and false news. For this, 2 experiments were carried out with the participation of 93 young people, who judged the truth or falsity of news presented in text and image, related to 4 categories of products and services, by means of a forced choice task. For the analysis of the information, the Signal Detection Theory (SDT) was used, a methodology that allows the independent study of discrimination, recognition and decision-making, related to information processing. The results show a positive effect of the feedback on the discrimination indices, and a null effect on the recognition indices. Initially the participants prefer to report the news as fake in case of uncertainty, which shows a context of mistrust, thanks to the feedback the doubt decreases so the decision criterion is neutralized. These findings show the need to present news readers with sources of immediate verification that allow them to improve information processing and decision-making.</p>