This is not an article about ethical philosophy per se. The article is concerned with how people actually think when they make moral judgments, not how they should think, or what their conclusions ought to be. In particular, the article asserts that people don't think in utilitarian terms when they make moral judgments.

Besides, it's not like every paper related to ethics should contain a summary of every ethical framework you listed. It's a research paper, and its intended audience knows those things already. It's not a syllabus for a sophomore survey course on ethics.