Selection, Not Salience: The Shape and Limits of Personalization in Social Highlighting
Does personalizing what a reader sees pay off, and where does it stop? Using a social web highlighter and a co-readership identity control (the same document highlighted by many users, which holds document and topic fixed and asks whether a person's own history predicts their marks better than another reader's does), we map the shape and limits of personalization across reading altitudes. At the document altitude we give the clean, leakage-free, identity-controlled measurement that prior next-document evaluations could only upper-bound: a person's history identifies which documents in a co-reading neighborhood are theirs, with an own-versus-other gap of +0.169 against community negatives ...
| Authors | Kazuki Nakayashiki, Keisuke Watanabe |
|---|---|
| Primary category | cs.IR |
| Published | 9 June 2026 |
| Last updated at source | 9 June 2026 |
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