What metric is described as social media-based in the context of publication evaluation?

The correct answer is Altmetrics, as it refers specifically to metrics that assess the impact and reach of publications through social media and other online platforms. Altmetrics are a modern approach to measuring the dissemination and influence of research beyond traditional citation metrics. They include data like the number of mentions on social media, shares, likes, and discussions, reflecting how a publication is perceived and engaged with in an online setting.

This metric is particularly valuable because it provides insights into the immediate public engagement and visibility of research outputs, contrasting with traditional metrics like impact factors and citation rates, which often lag behind in reflecting current discussions and trends. While impact factors and citation rates evaluate scholarly impact through established academic channels, they do not capture the breadth of interactions and conversations occurring in real time on social media platforms.

Journal rank, while an important measure of a journal’s reputation and influence within its field, does not specifically focus on social media dynamics. Therefore, Altmetrics are distinct in their emphasis on the online visibility and engagement of publications, making it the most accurate answer in the context of social media-based evaluation.