Bias scores can be generated from articles. A bias score generator can be configured to aggregate and process articles to identify entities and policies that appear in the articles and to generate sentiment values for the entities and policies. Aspect-based targeted sentiment analysis may be employed to generate the sentiment values. The bias score generator can process the sentiment values to generate a bias score for each article. Bias scores for multiple articles can be combined to generate a media bias score for a source of the articles. Bias loaded words and bias loaded snippets may also be used to generate a media bias score.